- 21 Mar, 2012 3 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds authored
Pull networking merge from David Miller: "1) Move ixgbe driver over to purely page based buffering on receive. From Alexander Duyck. 2) Add receive packet steering support to e1000e, from Bruce Allan. 3) Convert TCP MD5 support over to RCU, from Eric Dumazet. 4) Reduce cpu usage in handling out-of-order TCP packets on modern systems, also from Eric Dumazet. 5) Support the IP{,V6}_UNICAST_IF socket options, making the wine folks happy, from Erich Hoover. 6) Support VLAN trunking from guests in hyperv driver, from Haiyang Zhang. 7) Support byte-queue-limtis in r8169, from Igor Maravic. 8) Outline code intended for IP_RECVTOS in IP_PKTOPTIONS existed but was never properly implemented, Jiri Benc fixed that. 9) 64-bit statistics support in r8169 and 8139too, from Junchang Wang. 10) Support kernel side dump filtering by ctmark in netfilter ctnetlink, from Pablo Neira Ayuso. 11) Support byte-queue-limits in gianfar driver, from Paul Gortmaker. 12) Add new peek socket options to assist with socket migration, from Pavel Emelyanov. 13) Add sch_plug packet scheduler whose queue is controlled by userland daemons using explicit freeze and release commands. From Shriram Rajagopalan. 14) Fix FCOE checksum offload handling on transmit, from Yi Zou." * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1846 commits) Fix pppol2tp getsockname() Remove printk from rds_sendmsg ipv6: fix incorrent ipv6 ipsec packet fragment cpsw: Hook up default ndo_change_mtu. net: qmi_wwan: fix build error due to cdc-wdm dependecy netdev: driver: ethernet: Add TI CPSW driver netdev: driver: ethernet: add cpsw address lookup engine support phy: add am79c874 PHY support mlx4_core: fix race on comm channel bonding: send igmp report for its master fs_enet: Add MPC5125 FEC support and PHY interface selection net: bpf_jit: fix BPF_S_LDX_B_MSH compilation net: update the usage of CHECKSUM_UNNECESSARY fcoe: use CHECKSUM_UNNECESSARY instead of CHECKSUM_PARTIAL on tx net: do not do gso for CHECKSUM_UNNECESSARY in netif_needs_gso ixgbe: Fix issues with SR-IOV loopback when flow control is disabled net/hyperv: Fix the code handling tx busy ixgbe: fix namespace issues when FCoE/DCB is not enabled rtlwifi: Remove unused ETH_ADDR_LEN defines igbvf: Use ETH_ALEN ... Fix up fairly trivial conflicts in drivers/isdn/gigaset/interface.c and drivers/net/usb/{Kconfig,qmi_wwan.c} as per David.
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/wqLinus Torvalds authored
Pull workqueue changes from Tejun Heo: "This contains only one commit which cleans up UP allocation path a bit." * 'for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: use percpu allocator for cwq on UP
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroupLinus Torvalds authored
Pull cgroup changes from Tejun Heo: "Out of the 8 commits, one fixes a long-standing locking issue around tasklist walking and others are cleanups." * 'for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup: Walk task list under tasklist_lock in cgroup_enable_task_cg_list cgroup: Remove wrong comment on cgroup_enable_task_cg_list() cgroup: remove cgroup_subsys argument from callbacks cgroup: remove extra calls to find_existing_css_set cgroup: replace tasklist_lock with rcu_read_lock cgroup: simplify double-check locking in cgroup_attach_proc cgroup: move struct cgroup_pidlist out from the header file cgroup: remove cgroup_attach_task_current_cg()
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- 20 Mar, 2012 21 commits
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Oleg Nesterov authored
Minor cleanup. de_thread()->setmax_mm_hiwater_rss() looks a bit strange, move it into exec_mmap() which plays with old_mm. Signed-off-by:
Oleg Nesterov <oleg@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Oleg Nesterov authored
exit_notify() changes ->exit_signal if the parent already did exec. This doesn't really work, we are not going to send the signal now if there is another live thread or the exiting task is traced. The parent can exec before the last dies or the tracer detaches. Move this check into do_notify_parent() which actually sends the signal. The user-visible change is that we do not change ->exit_signal, and thus the exiting task is still "clone children" for do_wait()->eligible_child(__WCLONE). Hopefully this is fine, the current logic is racy anyway. Signed-off-by:
Oleg Nesterov <oleg@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Oleg Nesterov authored
exit_notify() checks "tsk->self_exec_id != tsk->parent_exec_id" to handle the "we have changed execution domain" case. We can change do_thread() to always set ->exit_signal = SIGCHLD and remove this check to simplify the code. We could change setup_new_exec() instead, this looks more logical because it increments ->self_exec_id. But note that de_thread() already resets ->exit_signal if it changes the leader, let's keep both changes close to each other. Note that we change ->exit_signal lockless, this changes the rules. Thereafter ->exit_signal is not stable under tasklist but this is fine, the only possible change is OLDSIG -> SIGCHLD. This can race with eligible_child() but the race is harmless. We can race with reparent_leader() which changes our ->exit_signal in parallel, but it does the same change to SIGCHLD. The noticeable user-visible change is that the execing task is not "visible" to do_wait()->eligible_child(__WCLONE) right after exec. To me this looks more logical, and this is consistent with mt case. Signed-off-by:
Oleg Nesterov <oleg@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Oleg Nesterov authored
The child must not control its ->exit_signal, it is the parent who decides which signal the child should use for notification. This means that CLONE_PARENT should not use "clone_flags & CSIGNAL", the forking task is the sibling of the new process and their parent doesn't control exit_signal in this case. This patch uses ->exit_signal of the forking process, but perhaps we should simply use SIGCHLD. We read group_leader->exit_signal lockless, this can race with the ORIGINAL_SIGNAL -> SIGCHLD transition, but this is fine. Potentially this change allows to kill self_exec_id/parent_exec_id. Signed-off-by:
Oleg Nesterov <oleg@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Benjamin LaHaise authored
While testing L2TP functionality, I came across a bug in getsockname(). The IP address returned within the pppol2tp_addr's addr memember was not being set to the IP address in use. This bug is caused by using inet_sk() on the wrong socket (the L2TP socket rather than the underlying UDP socket), and was likely introduced during the addition of L2TPv3 support. Signed-off-by:
Benjamin LaHaise <bcrl@kvack.org> Signed-off-by:
James Chapman <jchapman@katalix.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Dave Jones authored
no socket layer outputs a message for this error and neither should rds. Signed-off-by:
Dave Jones <davej@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usbLinus Torvalds authored
Pull USB merge for 3.4-rc1 from Greg KH: "Here's the big USB merge for the 3.4-rc1 merge window. Lots of gadget driver reworks here, driver updates, xhci changes, some new drivers added, usb-serial core reworking to fix some bugs, and other various minor things. There are some patches touching arch code, but they have all been acked by the various arch maintainers." * tag 'usb-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (302 commits) net: qmi_wwan: add support for ZTE MF820D USB: option: add ZTE MF820D usb: gadget: f_fs: Remove lock is held before freeing checks USB: option: make interface blacklist work again usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver USB: ohci-pxa27x: add clk_prepare/clk_unprepare calls USB: use generic platform driver on ath79 USB: EHCI: Add a generic platform device driver USB: OHCI: Add a generic platform device driver USB: ftdi_sio: new PID: LUMEL PD12 USB: ftdi_sio: add support for FT-X series devices USB: serial: mos7840: Fixed MCS7820 device attach problem usb: Don't make USB_ARCH_HAS_{XHCI,OHCI,EHCI} depend on USB_SUPPORT. usb gadget: fix a section mismatch when compiling g_ffs with CONFIG_USB_FUNCTIONFS_ETH USB: ohci-nxp: Remove i2c_write(), use smbus USB: ohci-nxp: Support for LPC32xx USB: ohci-nxp: Rename symbols from pnx4008 to nxp USB: OHCI-HCD: Rename ohci-pnx4008 to ohci-nxp usb: gadget: Kconfig: fix typo for 'different' usb: dwc3: pci: fix another failure path in dwc3_pci_probe() ...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/ttyLinus Torvalds authored
Pull TTY/serial patches from Greg KH: "tty and serial merge for 3.4-rc1 Here's the big serial and tty merge for the 3.4-rc1 tree. There's loads of fixes and reworks in here from Jiri for the tty layer, and a number of patches from Alan to help try to wrestle the vt layer into a sane model. Other than that, lots of driver updates and fixes, and other minor stuff, all detailed in the shortlog." * tag 'tty-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (132 commits) serial: pxa: add clk_prepare/clk_unprepare calls TTY: Wrong unicode value copied in con_set_unimap() serial: PL011: clear pending interrupts serial: bfin-uart: Don't access tty circular buffer in TX DMA interrupt after it is reset. vt: NULL dereference in vt_do_kdsk_ioctl() tty: serial: vt8500: fix annotations for probe/remove serial: remove back and forth conversions in serial_out_sync serial: use serial_port_in/out vs serial_in/out in 8250 serial: introduce generic port in/out helpers serial: reduce number of indirections in 8250 code serial: delete useless void casts in 8250.c serial: make 8250's serial_in shareable to other drivers. serial: delete last unused traces of pausing I/O in 8250 pch_uart: Add module parameter descriptions pch_uart: Use existing default_baud in setup_console pch_uart: Add user_uartclk parameter pch_uart: Add Fish River Island II uart clock quirks pch_uart: Use uartclk instead of base_baud mpc5200b/uart: select more tolerant uart prescaler on low baudrates tty: moxa: fix bit test in moxa_start() ...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/stagingLinus Torvalds authored
Pull big staging driver updates from Greg KH: "Here is the big drivers/staging/ merge for 3.4-rc1 Lots of new driver updates here, with the addition of a few new ones, and only one moving out of the staging tree to the "real" part of the kernel (the hyperv scsi driver, acked by the scsi maintainer). There are also loads of cleanups, fixes, and other minor things in here, all self-contained in the drivers/staging/ tree. Overall we reversed the recent trend by adding more lines than we removed: 379 files changed, 37952 insertions(+), 14153 deletions(-)" * tag 'staging-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (360 commits) staging/zmem: Use lockdep_assert_held instead of spin_is_locked Staging: rtl8187se: r8180_wx.c: Cleaned up comments Staging: rtl8187se: r8180_wx.c: Removed old comments Staging: rtl8187se: r8180_dm.c: Removed old comments Staging: android: ram_console.c: Staging: rtl8187se: r8180_dm.c: Fix comments Staging: rtl8187se: r8180_dm.c: Fix spacing issues Staging: rtl8187se: r8180_dm.c Fixed indentation issues Staging: rtl8187se: r8180_dm.c: Fix brackets Staging: rtl8187se: r8180_dm.c: Removed spaces before tab stop staging: vme: fix section mismatches in linux-next 20120314 Staging: rtl8187se: r8180_core.c: Fix some long line issues Staging: rtl8187se: r8180_core.c: Fix some spacing issues Staging: rtl8187se: r8180_core.c: Removed trailing spaces staging: mei: remove driver internal versioning Staging: rtl8187se: r8180_core.c: Cleaned up if statement staging: ozwpan depends on NET staging: ozwpan: added maintainer for ozwpan driver staging/mei: propagate error codes up in the write flow drivers:staging:mei Fix some typos in staging/mei ...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-coreLinus Torvalds authored
Pull driver core patches for 3.4-rc1 from Greg KH: "Here's the big driver core merge for 3.4-rc1. Lots of various things here, sysfs fixes/tweaks (with the nlink breakage reverted), dynamic debugging updates, w1 drivers, hyperv driver updates, and a variety of other bits and pieces, full information in the shortlog." * tag 'driver-core-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (78 commits) Tools: hv: Support enumeration from all the pools Tools: hv: Fully support the new KVP verbs in the user level daemon Drivers: hv: Support the newly introduced KVP messages in the driver Drivers: hv: Add new message types to enhance KVP regulator: Support driver probe deferral Revert "sysfs: Kill nlink counting." uevent: send events in correct order according to seqnum (v3) driver core: minor comment formatting cleanups driver core: move the deferred probe pointer into the private area drivercore: Add driver probe deferral mechanism DS2781 Maxim Stand-Alone Fuel Gauge battery and w1 slave drivers w1_bq27000: Only one thread can access the bq27000 at a time. w1_bq27000 - remove w1_bq27000_write w1_bq27000: remove unnecessary NULL test. sysfs: Fix memory leak in sysfs_sd_setsecdata(). intel_idle: Revert change of auto_demotion_disable_flags for Nehalem w1: Fix w1_bq27000 driver-core: documentation: fix up Greg's email address powernow-k6: Really enable auto-loading powernow-k7: Fix CPU family number ...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-miscLinus Torvalds authored
Pull char and misc patches for 3.4-rc1 from Greg KH: "Not much here, just a few minor fixes and some conversions to the module_*_driver() functions, making the codebase smaller." * tag 'char-misc-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: misc: bmp085: Use unsigned long to store jiffies char/ramoops: included linux/err.h twice misc: bmp085: Handle jiffies overflow correctly misc: fsa9480: Remove obsolete cleanup for clientdata char: Fix typo in tlclk.c char: Fix typo in viotape.c cs5535-mfgpt: don't call __init function from __devinit MISC: convert drivers/misc/* to use module_spi_driver() MISC: convert drivers/misc/* to use module_i2c_driver() MISC: convert drivers/misc/* to use module_platform_driver()
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Dan Carpenter authored
We should be testing "if (vnode->flags & (1 << 4))" instead of "if (vnode->flags & 4) {". The current test checks if the data was modified instead of deleted. Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull timer changes for v3.4 from Ingo Molnar * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (32 commits) ntp: Fix integer overflow when setting time math: Introduce div64_long cs5535-clockevt: Allow the MFGPT IRQ to be shared cs5535-clockevt: Don't ignore MFGPT on SMP-capable kernels x86/time: Eliminate unused irq0_irqs counter clocksource: scx200_hrt: Fix the build x86/tsc: Reduce the TSC sync check time for core-siblings timer: Fix bad idle check on irq entry nohz: Remove ts->Einidle checks before restarting the tick nohz: Remove update_ts_time_stat from tick_nohz_start_idle clockevents: Leave the broadcast device in shutdown mode when not needed clocksource: Load the ACPI PM clocksource asynchronously clocksource: scx200_hrt: Convert scx200 to use clocksource_register_hz clocksource: Get rid of clocksource_calc_mult_shift() clocksource: dbx500: convert to clocksource_register_hz() clocksource: scx200_hrt: use pr_<level> instead of printk time: Move common updates to a function time: Reorder so the hot data is together time: Remove most of xtime_lock usage in timekeeping.c ntp: Add ntp_lock to replace xtime_locking ...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull scheduler changes for v3.4 from Ingo Molnar * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits) printk: Make it compile with !CONFIG_PRINTK sched/x86: Fix overflow in cyc2ns_offset sched: Fix nohz load accounting -- again! sched: Update yield() docs printk/sched: Introduce special printk_sched() for those awkward moments sched/nohz: Correctly initialize 'next_balance' in 'nohz' idle balancer sched: Cleanup cpu_active madness sched: Fix load-balance wreckage sched: Clean up parameter passing of proc_sched_autogroup_set_nice() sched: Ditch per cgroup task lists for load-balancing sched: Rename load-balancing fields sched: Move load-balancing arguments into helper struct sched/rt: Do not submit new work when PI-blocked sched/rt: Prevent idle task boosting sched/wait: Add __wake_up_all_locked() API sched/rt: Document scheduler related skip-resched-check sites sched/rt: Use schedule_preempt_disabled() sched/rt: Add schedule_preempt_disabled() sched/rt: Do not throttle when PI boosting sched/rt: Keep period timer ticking when rt throttling is active ...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull perf events changes for v3.4 from Ingo Molnar: - New "hardware based branch profiling" feature both on the kernel and the tooling side, on CPUs that support it. (modern x86 Intel CPUs with the 'LBR' hardware feature currently.) This new feature is basically a sophisticated 'magnifying glass' for branch execution - something that is pretty difficult to extract from regular, function histogram centric profiles. The simplest mode is activated via 'perf record -b', and the result looks like this in perf report: $ perf record -b any_call,u -e cycles:u branchy $ perf report -b --sort=symbol 52.34% [.] main [.] f1 24.04% [.] f1 [.] f3 23.60% [.] f1 [.] f2 0.01% [k] _IO_new_file_xsputn [k] _IO_file_overflow 0.01% [k] _IO_vfprintf_internal [k] _IO_new_file_xsputn 0.01% [k] _IO_vfprintf_internal [k] strchrnul 0.01% [k] __printf [k] _IO_vfprintf_internal 0.01% [k] main [k] __printf This output shows from/to branch columns and shows the highest percentage (from,to) jump combinations - i.e. the most likely taken branches in the system. "branches" can also include function calls and any other synchronous and asynchronous transitions of the instruction pointer that are not 'next instruction' - such as system calls, traps, interrupts, etc. This feature comes with (hopefully intuitive) flat ascii and TUI support in perf report. - Various 'perf annotate' visual improvements for us assembly junkies. It will now recognize function calls in the TUI and by hitting enter you can follow the call (recursively) and back, amongst other improvements. - Multiple threads/processes recording support in perf record, perf stat, perf top - which is activated via a comma-list of PIDs: perf top -p 21483,21485 perf stat -p 21483,21485 -ddd perf record -p 21483,21485 - Support for per UID views, via the --uid paramter to perf top, perf report, etc. For example 'perf top --uid mingo' will only show the tasks that I am running, excluding other users, root, etc. - Jump label restructurings and improvements - this includes the factoring out of the (hopefully much clearer) include/linux/static_key.h generic facility: struct static_key key = STATIC_KEY_INIT_FALSE; ... if (static_key_false(&key)) do unlikely code else do likely code ... static_key_slow_inc(); ... static_key_slow_inc(); ... The static_key_false() branch will be generated into the code with as little impact to the likely code path as possible. the static_key_slow_*() APIs flip the branch via live kernel code patching. This facility can now be used more widely within the kernel to micro-optimize hot branches whose likelihood matches the static-key usage and fast/slow cost patterns. - SW function tracer improvements: perf support and filtering support. - Various hardenings of the perf.data ABI, to make older perf.data's smoother on newer tool versions, to make new features integrate more smoothly, to support cross-endian recording/analyzing workflows better, etc. - Restructuring of the kprobes code, the splitting out of 'optprobes', and a corner case bugfix. - Allow the tracing of kernel console output (printk). - Improvements/fixes to user-space RDPMC support, allowing user-space self-profiling code to extract PMU counts without performing any system calls, while playing nice with the kernel side. - 'perf bench' improvements - ... and lots of internal restructurings, cleanups and fixes that made these features possible. And, as usual this list is incomplete as there were also lots of other improvements * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (120 commits) perf report: Fix annotate double quit issue in branch view mode perf report: Remove duplicate annotate choice in branch view mode perf/x86: Prettify pmu config literals perf report: Enable TUI in branch view mode perf report: Auto-detect branch stack sampling mode perf record: Add HEADER_BRANCH_STACK tag perf record: Provide default branch stack sampling mode option perf tools: Make perf able to read files from older ABIs perf tools: Fix ABI compatibility bug in print_event_desc() perf tools: Enable reading of perf.data files from different ABI rev perf: Add ABI reference sizes perf report: Add support for taken branch sampling perf record: Add support for sampling taken branch perf tools: Add code to support PERF_SAMPLE_BRANCH_STACK x86/kprobes: Split out optprobe related code to kprobes-opt.c x86/kprobes: Fix a bug which can modify kernel code permanently x86/kprobes: Fix instruction recovery on optimized path perf: Add callback to flush branch_stack on context switch perf: Disable PERF_SAMPLE_BRANCH_* when not supported perf/x86: Add LBR software filter support for Intel CPUs ...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull irq/core changes for v3.4 from Ingo Molnar * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq: Remove paranoid warnons and bogus fixups genirq: Flush the irq thread on synchronization genirq: Get rid of unnecessary IRQTF_DIED flag genirq: No need to check IRQTF_DIED before stopping a thread handler genirq: Get rid of unnecessary irqaction field in task_struct genirq: Fix incorrect check for forced IRQ thread handler softirq: Reduce invoke_softirq() code duplication genirq: Fix long-term regression in genirq irq_set_irq_type() handling x86-32/irq: Don't switch to irq stack for a user-mode irq
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull RCU changes for v3.4 from Ingo Molnar. The major features of this series are: - making RCU more aggressive about entering dyntick-idle mode in order to improve energy efficiency - converting a few more call_rcu()s to kfree_rcu()s - applying a number of rcutree fixes and cleanups to rcutiny - removing CONFIG_SMP #ifdefs from treercu - allowing RCU CPU stall times to be set via sysfs - adding CPU-stall capability to rcutorture - adding more RCU-abuse diagnostics - updating documentation - fixing yet more issues located by the still-ongoing top-to-bottom inspection of RCU, this time with a special focus on the CPU-hotplug code path. * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (48 commits) rcu: Stop spurious warnings from synchronize_sched_expedited rcu: Hold off RCU_FAST_NO_HZ after timer posted rcu: Eliminate softirq-mediated RCU_FAST_NO_HZ idle-entry loop rcu: Add RCU_NONIDLE() for idle-loop RCU read-side critical sections rcu: Allow nesting of rcu_idle_enter() and rcu_idle_exit() rcu: Remove redundant check for rcu_head misalignment PTR_ERR should be called before its argument is cleared. rcu: Convert WARN_ON_ONCE() in rcu_lock_acquire() to lockdep rcu: Trace only after NULL-pointer check rcu: Call out dangers of expedited RCU primitives rcu: Rework detection of use of RCU by offline CPUs lockdep: Add CPU-idle/offline warning to lockdep-RCU splat rcu: No interrupt disabling for rcu_prepare_for_idle() rcu: Move synchronize_sched_expedited() to rcutree.c rcu: Check for illegal use of RCU from offlined CPUs rcu: Update stall-warning documentation rcu: Add CPU-stall capability to rcutorture rcu: Make documentation give more realistic rcutorture duration rcutorture: Permit holding off CPU-hotplug operations during boot rcu: Print scheduling-clock information on RCU CPU stall-warning messages ...
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Gao feng authored
Since commit 299b0767(ipv6: Fix IPsec slowpath fragmentation problem) In func ip6_append_data,after call skb_put(skb, fraglen + dst_exthdrlen) the skb->len contains dst_exthdrlen,and we don't reduce dst_exthdrlen at last This will make fraggap>0 in next "while cycle",and cause the size of skb incorrent Fix this by reserve headroom for dst_exthdrlen. Signed-off-by:
Gao feng <gaofeng@cn.fujitsu.com> Acked-by:
Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Reported-by:
Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull core/locking changes for v3.4 from Ingo Molnar * 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: futex: Simplify return logic futex: Cover all PI opcodes with cmpxchg enabled check
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull core/iommu changes for v3.4 from Ingo Molnar * 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/iommu/intel: Increase the number of iommus supported to MAX_IO_APICS x86/iommu/intel: Fix identity mapping for sandy bridge
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- 19 Mar, 2012 16 commits
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Linus Torvalds authored
* branch 'dcache-word-accesses': vfs: use 'unsigned long' accesses for dcache name comparison and hashing This does the name hashing and lookup using word-sized accesses when that is efficient, namely on x86 (although any little-endian machine with good unaligned accesses would do). It does very much depend on little-endian logic, but it's a very hot couple of functions under some real loads, and this patch improves the performance of __d_lookup_rcu() and link_path_walk() by up to about 30%. Giving a 10% improvement on some very pathname-heavy benchmarks. Because we do make unaligned accesses past the filename, the optimization is disabled when CONFIG_DEBUG_PAGEALLOC is active, and we effectively depend on the fact that on x86 we don't really ever have the last page of usable RAM followed immediately by any IO memory (due to ACPI tables, BIOS buffer areas etc). Some of the bit operations we do are a bit "subtle". It's commented, but you do need to really think about the code. Or just consider it black magic. Thanks to people on G+ for some of the optimized bit tricks.
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Linus Torvalds authored
For some odd historical reason, the final mixing round for the dentry cache hash table lookup had an insane "xor with big constant" logic. In two places. The big constant that is being xor'ed is GOLDEN_RATIO_PRIME, which is a fairly random-looking number that is designed to be *multiplied* with so that the bits get spread out over a whole long-word. But xor'ing with it is insane. It doesn't really even change the hash - it really only shifts the hash around in the hash table. To make matters worse, the insane big constant is different on 32-bit and 64-bit builds, even though the name hash bits we use are always 32-bit (and the bits from the pointer we mix in effectively are too). It's all total voodoo programming, in other words. Now, some testing and analysis of the hash chains shows that the rest of the hash function seems to be fairly good. It does pick the right bits of the parent dentry pointer, for example, and while it's generally a bad idea to use an xor to mix down the upper bits (because if there is a repeating pattern, the xor can cause "destructive interference"), it seems to not have been a disaster. For example, replacing the hash with the normal "hash_long()" code (that uses the GOLDEN_RATIO_PRIME constant correctly, btw) actually just makes the hash worse. The hand-picked hash knew which bits of the pointer had the highest entropy, and hash_long() ends up mixing bits less optimally at least in some trivial tests. So the hash function overall seems fine, it just has that really odd "shift result around by a constant xor". So get rid of the silly xor, and replace the down-mixing of the bits with an add instead of an xor that tends to not have the same kind of destructive interference issues. Some stats on the resulting hash chains shows that they look statistically identical before and after, but the code is simpler and no longer makes you go "WTF?". Also, the incoming hash really is just "unsigned int", not a long, and there's no real point to worry about the high 26 bits of the dentry pointer for the 64-bit case, because they are all going to be identical anyway. So also change the hashing to be done in the more natural 'unsigned int' that is the real size of the actual hashed data anyway. Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Bjørn Mork authored
Fixes: drivers/built-in.o: In function `qmi_wwan_bind_shared': qmi_wwan.c:(.text+0x25b686): undefined reference to `usb_cdc_wdm_register' make[1]: *** [.tmp_vmlinux1] Error 1 Reported-by:
Randy Dunlap <rdunlap@xenotime.net> Signed-off-by:
Bjørn Mork <bjorn@mork.no> Acked-by:
Randy Dunlap <rdunlap@xenotime.net> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Mugunthan V N authored
This patch adds support for TI's CPSW driver. The three port switch gigabit ethernet subsystem provides ethernet packet communication and can be configured as an ethernet switch. Supports 10/100/1000 Mbps. Signed-off-by:
Cyril Chemparathy <cyril@ti.com> Signed-off-by:
Sriramakrishnan A G <srk@ti.com> Signed-off-by:
Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Mugunthan V N authored
TI CPSW ethernet switch has a built-in address lookup engine. This patch adds the code necessary for programming this module. Signed-off-by:
Cyril Chemparathy <cyril@ti.com> Signed-off-by:
Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Heiko Schocher authored
Signed-off-by:
Heiko Schocher <hs@denx.de> Signed-off-by:
Anatolij Gustschin <agust@denx.de> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Eugenia Emantayev authored
Prevent race condition between commands on comm channel. Happened while unloading the driver when switching from event to polling mode. VF got completion on the last command before switching to polling mode, but toggle was not changed. After the fix - VF will not write the next command before toggle is updated. Signed-off-by:
Eugenia Emantayev <eugenia@mellanox.co.il> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Peter Pan(潘卫平) authored
Liang Zheng(lzheng@redhat.com) found that in the following topo, bonding does not send igmp report when we trigger a fail-over of bonding. eth0-- |-- bond0 -- br0 eth1-- modprobe bonding mode=1 miimon=100 resend_igmp=10 ifconfig bond0 up ifenslave bond0 eth0 eth1 brctl addbr br0 ifconfig br0 192.168.100.2/24 up brctl addif br0 bond0 Add 192.168.100.2(br0) into a multicast group, like 224.10.10.10, then trigger a fali-over in bonding. You can see that parameter "resend_igmp" does not work. The reason is that when we add br0 into a multicast group, it does not propagate multicast knowledge down to its ports. If we choose to propagate multicast knowledge down to all ports for bridge, then we have to track every change that is done to bridge, and keep a backup for all ports. It is hard to track, I think. Instead I choose to modify bonding to send igmp report for its master. Changelog: V2: correct comments V3: move this check into bond_resend_igmp_join_requests() V4: only send igmp reports if bond is enslaved to a bridge Signed-off-by:
Weiping Pan <panweiping3@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Vladimir Ermakov authored
Add compatible string for MPC5125 FEC. The FEC on MPC5125 additionally supports RMII PHY interface. Configure controller/PHY interface type according to the optional phy-connection-type property in the ethernet node. This property should be either "rmii" or "mii". Signed-off-by:
Vladimir Ermakov <vooon341@gmail.com> Signed-off-by:
Anatolij Gustschin <agust@denx.de> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
Matt Evans spotted that x86 bpf_jit was incorrectly handling negative constant offsets in BPF_S_LDX_B_MSH instruction. We need to abort JIT compilation like we do in common_load so that filter uses the interpreter code and can call __load_pointer() Reference: http://lists.openwall.net/netdev/2011/07/19/11 Thanks to Indan Zupancic to bring back this issue. Reported-by:
Matt Evans <matt@ozlabs.org> Reported-by:
Indan Zupancic <indan@nul.nu> Signed-off-by:
Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yi Zou authored
As suggested by Ben, this adds the clarification on the usage of CHECKSUM_UNNECESSARY on the outgoing patch. Also add the usage description of NETIF_F_FCOE_CRC and CHECKSUM_UNNECESSARY for the kernel FCoE protocol driver. This is a follow-up to the following: http://patchwork.ozlabs.org/patch/147315/Signed-off-by:
Yi Zou <yi.zou@intel.com> Cc: Ben Hutchings <bhutchings@solarflare.com> Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Cc: www.Open-FCoE.org <devel@open-fcoe.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yi Zou authored
Fix a bug when using 'ethtool -K ethx tx off' to turn off tx ip checksum, FCoE CRC offload should not be impacte. The skb_checksum_help() is needed only if it's not FCoE traffic for ip checksum, regardless of ethtool toggling the tx ip checksum on or off. Instead of using CHECKSUM_PARTIAL, we will use CHECKSUM_UNNECESSARY as a proper indication to avoid sw ip checksum on FCoE frames. Ref. to original discussion thread: http://patchwork.ozlabs.org/patch/146567/ CC: "James E.J. Bottomley" <JBottomley@parallels.com> CC: Robert Love <robert.w.love@intel.com> Signed-off-by:
Yi Zou <yi.zou@intel.com> Tested-by:
Ross Brattain <ross.b.brattain@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yi Zou authored
This is related to fixing the bug of dropping FCoE frames when disabling tx ip checksum by 'ethtool -K ethx tx off'. The FCoE protocol stack driver would use CHECKSUM_UNNECESSARY on tx path instead of CHECKSUM_PARTIAL (as indicated in the 2/2 of this series). To do so, netif_needs_gso() has to be changed here to not do gso for both CHECKSUM_PARTIAL and CHECKSUM_UNNECESSARY. Ref. to original discussion thread: http://patchwork.ozlabs.org/patch/146567/Signed-off-by:
Yi Zou <yi.zou@intel.com> Tested-by:
Ross Brattain <ross.b.brattain@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alexander Duyck authored
This patch allows us to avoid a Tx hang when SR-IOV is enabled. This hang can be triggered by sending small packets at a rate that was triggering Rx missed errors from the adapter while the internal Tx switch and at least one VF are enabled. This was all due to the fact that under heavy stress the Rx FIFO never drained below the flow control high water mark. This resulted in the Tx FIFO being head of line blocked due to the fact that it relies on the flow control high water mark to determine when it is acceptable for the Tx to place a packet in the Rx FIFO. The resolution for this is to set the FCRTH value to the RXPBSIZE - 32 so that even if the ring is almost completely full we can still place Tx packets on the Rx ring and drop incoming Rx traffic if we do not have sufficient space available in the Rx FIFO. Signed-off-by:
Alexander Duyck <alexander.h.duyck@intel.com> Tested-by:
Sibai Li <sibai.li@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Haiyang Zhang authored
Instead of dropping the packet, we keep the skb buffer, and return NETDEV_TX_BUSY to let upper layer retry send. This will not cause endless loop, because the host is taking data away from ring buffer, and we have called the stop_queue before returning NETDEV_TX_BUSY. The stop_queue was called in the function netvsc_send() in file netvsc.c, then it returns to rndis_filter_send(), which returns to netvsc_start_xmit() in file netvsc_drv.c. So the NETDEV_TX_BUSY is indeed returned AFTER queue is stopped. Signed-off-by:
Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by:
K. Y. Srinivasan <kys@microsoft.com> Acked-by:
Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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