- 01 Oct, 2009 17 commits
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KAMEZAWA Hiroyuki authored
This patch clean up/fixes for memcg's uncharge soft limit path. Problems: Now, res_counter_charge()/uncharge() handles softlimit information at charge/uncharge and softlimit-check is done when event counter per memcg goes over limit. Now, event counter per memcg is updated only when memory usage is over soft limit. Here, considering hierarchical memcg management, ancesotors should be taken care of. Now, ancerstors(hierarchy) are handled in charge() but not in uncharge(). This is not good. Prolems: 1. memcg's event counter incremented only when softlimit hits. That's bad. It makes event counter hard to be reused for other purpose. 2. At uncharge, only the lowest level rescounter is handled. This is bug. Because ancesotor's event counter is not incremented, children should take care of them. 3. res_counter_uncharge()'s 3rd argument is NULL in most case. ops under res_counter->lock should be small. No "if" sentense is better. Fixes: * Removed soft_limit_xx poitner and checks in charge and uncharge. Do-check-only-when-necessary scheme works enough well without them. * make event-counter of memcg incremented at every charge/uncharge. (per-cpu area will be accessed soon anyway) * All ancestors are checked at soft-limit-check. This is necessary because ancesotor's event counter may never be modified. Then, they should be checked at the same time. Reviewed-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Paul Menage <menage@google.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Balbir Singh <balbir@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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KAMEZAWA Hiroyuki authored
__css_put() doesn't check a bug as refcnt goes to minus. I think it should be caught. This patch adds a check for it. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Paul Menage <menage@google.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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KAMEZAWA Hiroyuki authored
__mem_cgroup_largest_soft_limit_node() returns a mem_cgroup_per_zone "mz" with incremnted mz->mem->css's refcnt. Then, the caller of this function has to call css_put(mz->mem->css). But, mz can be !NULL even if "not found" i.e. without css_get(). By this, css->refcnt will go down to minus. This may cause various things...one of results will be initite-loop in css_tryget() as this. INFO: RCU detected CPU 0 stall (t=10000 jiffies) sending NMI to all CPUs: NMI backtrace for cpu 0 CPU 0: <snip> <<EOE>> <IRQ> [<ffffffff810884bd>] trace_hardirqs_off+0xd/0x10 [<ffffffff8102a940>] flat_send_IPI_mask+0x90/0xb0 [<ffffffff8102a9c9>] flat_send_IPI_all+0x69/0x70 [<ffffffff81027372>] arch_trigger_all_cpu_backtrace+0x62/0xa0 [<ffffffff810bff8e>] __rcu_pending+0x7e/0x370 [<ffffffff810c02c7>] rcu_check_callbacks+0x47/0x130 [<ffffffff81063a26>] update_process_times+0x46/0x70 [<ffffffff81085930>] tick_sched_timer+0x60/0x160 [<ffffffff810858d0>] ? tick_sched_timer+0x0/0x160 [<ffffffff8107a03a>] __run_hrtimer+0xba/0x150 [<ffffffff8107a325>] hrtimer_interrupt+0xd5/0x1b0 [<ffffffff81426dfe>] ? trace_hardirqs_off_thunk+0x3a/0x3c [<ffffffff8142cacd>] smp_apic_timer_interrupt+0x6d/0x9b [<ffffffff8100cb33>] apic_timer_interrupt+0x13/0x20 <EOI> [<ffffffff811317b6>] ? mem_cgroup_walk_tree+0x156/0x180 [<ffffffff811316d3>] ? mem_cgroup_walk_tree+0x73/0x180 [<ffffffff81131692>] ? mem_cgroup_walk_tree+0x32/0x180 [<ffffffff81131a00>] ? mem_cgroup_get_local_stat+0x0/0x110 [<ffffffff81131d5b>] ? mem_control_stat_show+0x14b/0x330 [<ffffffff810a57fd>] ? cgroup_seqfile_show+0x3d/0x60 Above shows CPU0 caught in css_tryget()'s inifinite loop because of bad refcnt. This is a fix to set mz=NULL at the top of retry path. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Paul Menage <menage@google.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Richard Röjfors authored
Some configurations of the Timberdale FPGA has the uartlite included. Signed-off-by: Richard Röjfors <richard.rojfors@mocean-labs.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Randy Dunlap authored
This patch size comment is like so last millenium. Update it to modern times. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Albert Herranz authored
Some manufacturers provide vendor information in non-vendor specific CIS tuples. For example, Broadcom uses an Extended Function tuple to provide the MAC address on some of their network cards, as in the case of the Nintendo Wii WLAN daughter card. This patch allows passing whitelisted FUNCE tuples unknown to the SDIO core to a matching SDIO driver instead of rejecting them and failing. Signed-off-by: Albert Herranz <albert_herranz@yahoo.es> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Huang Shijie authored
The page_address_in_vma() is not only used in unuse_vma(). Signed-off-by: Huang Shijie <shijie8@gmail.com> Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Samuel Thibault authored
Just like ip_fast_csum, the assembly snippet in csum_ipv6_magic needs a memory clobber, as it is only passed the address of the buffer, not a memory reference to the buffer itself. This caused failures in Hurd's pfinetv4 when we tried to compile it with gcc-4.3 (bogus checksums). Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Acked-by: "David S. Miller" <davem@davemloft.net> Cc: Andi Kleen <andi@firstfloor.org> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Mark Salter authored
Fix some build failures when using gcc-4.x for MN10300. Firstly, __get_user() fails to build because the pointer points to a const and __gu_val ends up being read-only: In file included from include/linux/mempolicy.h:62, from init/main.c:50: include/linux/pagemap.h: In function 'fault_in_pages_readable': include/linux/pagemap.h:394: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:394: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:394: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:400: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:400: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:400: error: read-only variable '__gu_val' used as 'asm' output make[1]: *** [init/main.o] Error 1 Secondly, gcc-4 doesn't allow casts of lvalues: UPD include/linux/compile.h arch/mn10300/kernel/rtc.c: In function 'calibrate_clock': arch/mn10300/kernel/rtc.c:170: error: lvalue required as left operand of assignment arch/mn10300/kernel/rtc.c:172: error: lvalue required as left operand of assignment make[1]: *** [arch/mn10300/kernel/rtc.o] Error 1 These are seen with gcc 4.2.1. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Joe Perches authored
Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Marek Vasut <marek.vasut@gmail.com> Acked-by: Tomas Cech <sleep_walker@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Jiri Slaby authored
Stanse found (again) a BKL imbalance in vt_ioctl. It's easily triggerable by ioctl(dev_tty_fd, VT_SETACTIVATE, NULL); Introduced by commit d3b5cffc Author: Alan Cox <alan@linux.intel.com> Date: Sat Sep 19 13:13:26 2009 -0700 vt: add an activate and lock Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Alan Cox <alan@linux.intel.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Andrew Morton authored
Revert 45d80eea ("m68k: convert to asm-generic/hardirq.h") - it fails to compile due to an inclusion tangle: In file included from include/linux/irq.h:12, from include/asm-generic/hardirq.h:6, from /usr/src/devel/arch/m68k/include/asm/hardirq_mm.h:6, from /usr/src/devel/arch/m68k/include/asm/hardirq.h:4, from include/linux/hardirq.h:10, from /usr/src/devel/arch/m68k/include/asm/system_mm.h:69, from /usr/src/devel/arch/m68k/include/asm/system.h:4, from include/linux/list.h:7, from include/linux/preempt.h:11, from include/linux/spinlock.h:50, from include/linux/seqlock.h:29, from include/linux/time.h:8, from include/linux/timex.h:56, from include/linux/sched.h:56, from arch/m68k/kernel/asm-offsets.c:14: include/linux/smp.h:17: error: field 'list' has incomplete type Cc: Christoph Hellwig <hch@lst.de> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Mike Frysinger authored
The asm-generic/gpio.h header uses the might_sleep() macro but doesn't include the header for it, so any source code that might include linux/gpio.h before linux/kernel.h can easily lead to a build failure. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Alexey Dobriyan authored
[akpm@linux-foundation.org: fix KVM] Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Andrew Morton authored
drivers/input/input.c:1277: warning: 'input_dev_reset' defined but not used Acked-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Paul Mundt authored
Starting from commit 4a496226 "reduce symbol table for loaded modules (v2)", the kernel/module.c build is broken with CONFIG_KALLSYMS disabled. CC kernel/module.o kernel/module.c:1995: warning: type defaults to 'int' in declaration of 'Elf_Hdr' kernel/module.c:1995: error: expected ';', ',' or ')' before '*' token kernel/module.c: In function 'load_module': kernel/module.c:2203: error: 'strmap' undeclared (first use in this function) kernel/module.c:2203: error: (Each undeclared identifier is reported only once kernel/module.c:2203: error: for each function it appears in.) kernel/module.c:2239: error: 'symoffs' undeclared (first use in this function) kernel/module.c:2239: error: implicit declaration of function 'layout_symtab' kernel/module.c:2240: error: 'stroffs' undeclared (first use in this function) make[1]: *** [kernel/module.o] Error 1 make: *** [kernel/module.o] Error 2 There are three different issues: - layout_symtab() takes a const Elf_Ehdr - layout_symtab() needs to return a value - symoffs/stroffs/strmap are referenced by the load_module() code despite being ifdefed out, which seems unnecessary given the noop behaviour of layout_symtab()/add_kallsyms() in the case of CONFIG_KALLSYMS=n. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Jan Beulich <jbeulich@novell.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: ax25: Fix possible oops in ax25_make_new net: restore tx timestamping for accelerated vlans Phonet: fix mutex imbalance sit: fix off-by-one in ipip6_tunnel_get_prl net: Fix sock_wfree() race net: Make setsockopt() optlen be unsigned.
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- 30 Sep, 2009 23 commits
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Jarek Poplawski authored
In ax25_make_new, if kmemdup of digipeat returns an error, there would be an oops in sk_free while calling sk_destruct, because sk_protinfo is NULL at the moment; move sk->sk_destruct initialization after this. BTW of reported-by: Bernard Pidoux F6BVP <f6bvp@free.fr> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
Since commit 9b22ea56 ( net: fix packet socket delivery in rx irq handler ) We lost rx timestamping of packets received on accelerated vlans. Effect is that tcpdump on real dev can show strange timings, since it gets rx timestamps too late (ie at skb dequeueing time, not at skb queueing time) 14:47:26.986871 IP 192.168.20.110 > 192.168.20.141: icmp 64: echo request seq 1 14:47:26.986786 IP 192.168.20.141 > 192.168.20.110: icmp 64: echo reply seq 1 14:47:27.986888 IP 192.168.20.110 > 192.168.20.141: icmp 64: echo request seq 2 14:47:27.986781 IP 192.168.20.141 > 192.168.20.110: icmp 64: echo reply seq 2 14:47:28.986896 IP 192.168.20.110 > 192.168.20.141: icmp 64: echo request seq 3 14:47:28.986780 IP 192.168.20.141 > 192.168.20.110: icmp 64: echo reply seq 3 Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Rémi Denis-Courmont authored
From: Rémi Denis-Courmont <remi.denis-courmont@nokia.com> port_mutex was unlocked twice. Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Sascha Hlusiak authored
When requesting all prl entries (kprl.addr == INADDR_ANY) and there are more prl entries than there is space passed from userspace, the existing code would always copy cmax+1 entries, which is more than can be handled. This patch makes the kernel copy only exactly cmax entries. Signed-off-by: Sascha Hlusiak <contact@saschahlusiak.de> Acked-By: Fred L. Templin <Fred.L.Templin@boeing.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
Commit 2b85a34e (net: No more expensive sock_hold()/sock_put() on each tx) opens a window in sock_wfree() where another cpu might free the socket we are working on. A fix is to call sk->sk_write_space(sk) while still holding a reference on sk. Reported-by: Jike Song <albcamus@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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David S. Miller authored
This provides safety against negative optlen at the type level instead of depending upon (sometimes non-trivial) checks against this sprinkled all over the the place, in each and every implementation. Based upon work done by Arjan van de Ven and feedback from Linus Torvalds. Signed-off-by: David S. Miller <davem@davemloft.net>
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Linus Torvalds authored
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched_clock: Fix atomicity/continuity bug by using cmpxchg64() x86: Provide an alternative() based cmpxchg64()
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Eric Dumazet authored
Commit def0a9b2 (sched_clock: Make it NMI safe) assumed cmpxchg() of 64bit values was available on X86_32. That is not so - and causes some subtle scheduler misbehavior due to incorrect timestamps off to up by ~4 seconds. Two symptoms are known right now: - interactivity problems seen by Arjan: up to 600 msecs latencies instead of the expected 20-40 msecs. These latencies are very visible on the desktop. - incorrect CPU stats: occasionally too high percentages in 'top', and crazy CPU usage stats. Reported-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: John Stultz <johnstul@us.ibm.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20090930170754.0886ff2e@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Arjan van de Ven authored
cmpxchg64() today generates, to quote Linus, "barf bag" code. cmpxchg64() is about to get used in the scheduler to fix a bug there, but it's a prerequisite that cmpxchg64() first be made non-sucking. This patch turns cmpxchg64() into an efficient implementation that uses the alternative() mechanism to just use the raw instruction on all modern systems. Note: the fallback is NOT smp safe, just like the current fallback is not SMP safe. (Interested parties with i486 based SMP systems are welcome to submit fix patches for that.) Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> [ fixed asm constraint bug ] Fixed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20090930170754.0886ff2e@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds authored
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: MIPS: Avoid spurious make includecheck message MIPS: VPE: Get rid of BKL. MIPS: VPE: Fix build after the credential changes a while ago. MIPS: Excite: Get rid of BKL. MIPS: Sibyte: Get rid of BKL. MIPS: BCM63xx: Add PCMCIA & Cardbus support. MIPS: MSP71xx: request_irq() failure ignored in msp_pcibios_config_access() MIPS: Decrease size of au1xxx_dbdma_pm_regs[][] MIPS: SMP: Inline arch_send_call_function_{single_ipi,ipi_mask} MIPS: SMP: Fix build. MIPS: MIPSxx SC: Avoid destructive invalidation on partial L2 cachelines. MIPS: Sibyte: Fix compilation error. MIPS: BCM1480: Re-apply patch lost due to bad resolution of merge conflict. MIPS: BCM63xx: Add serial driver for bcm63xx integrated UART. MIPS: Loongson2: Fix typo "enalbe" -> "enable" MIPS: SMTC: Remove duplicate structure field initialization MIPS: Remove duplicated #include MIPS: BCM63xx: Remove duplicated #include
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Ralf Baechle authored
arch/mips/include/asm/unaligned.h: linux/unaligned/generic.h is included more than once. Entirely legitimate but just noise. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
It's not obvious what good it was supposed to do here anyway. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Maxime Bizon authored
Signed-off-by: Maxime Bizon <mbizon@freebox.fr> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Roel Kluin authored
Produce an error if request_irq() fails. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Cc: "Ithamar R. Adema" <ithamar.adema@team-embedded.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Roel Kluin authored
There are 16 individual channels (NUM_DBDMA_CHANS) to save/restore plus the global ddma block config (the +1). The last register in a channel can be skipped since it's read-only (at offset 0x18). Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Cc: Manuel Lauss <manuel.lauss@googlemail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
commit 48a048fe Author: Rusty Russell <rusty@rustcorp.com.au> Date: Thu Sep 24 09:34:44 2009 -0600 apparently only passed the "looks good" level of QA ;-) Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Kevin Cernekee authored
This extends commit a8ca8b64 to cover MIPSxx-style board cache code. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Mark Mason authored
Build error introduced by d4f587c6. Signed-off-by: Mark Mason <mmason@upwardaccess.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
Patch 14275ccdb1e4b487cca745aba994699c426a31ee and d5dedd45 are conflicting and the conflict was resolved badly in merge 92241940be501f798cb21db344bbb3d1ec3c4f1c resulting in the BCM1480 changes of 14275ccdb1e4b487cca745aba994699c426a31ee getting lost. Sort out the damage. Reported and initial patch by Mark Mason <mmason@upwardaccess.com>. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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