- 29 Mar, 2006 2 commits
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Oleg Nesterov authored
I think it is enough to take tasklist_lock for reading while changing child_reaper: Reparenting needs write_lock(tasklist_lock) Only one thread in a thread group can do exec() sighand->siglock garantees that get_signal_to_deliver() will not see a stale value of child_reaper. This means that we can change child_reaper earlier, without calling zap_other_threads() twice. "child_reaper = current" is a NOOP when init does exec from main thread, we don't care. Signed-off-by:
Oleg Nesterov <oleg@tv-sign.ru> Acked-by:
"Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Eric W. Biederman authored
After looking at the problem of init calling exec some more I figured out an easy way to make the code work. The actual symptom without out this patch is that all threads will die except pid == 1, and the thread calling exec. The thread calling exec will wait forever for pid == 1 to die. Since pid == 1 does not install a handler for SIGKILL it will never die. This modifies the tests for init from current->pid == 1 to the equivalent current == child_reaper. And then it causes exec in the ugly case to modify child_reaper. The only weird symptom is that you wind up with an init process that doesn't have the oldest start time on the box. Signed-off-by:
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- 28 Mar, 2006 38 commits
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Linus Torvalds authored
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 3388/1: ixp23xx: add core ixp23xx support [ARM] 3417/1: add support for logicpd pxa270 card engine [ARM] 3387/1: ixp23xx: add defconfig [ARM] 3377/2: add support for intel xsc3 core [ARM] Move ice-dcc code into misc.c [ARM] Fix decompressor serial IO to give CRLF not LFCR [ARM] proc-v6: mark page table walks outer-cacheable, shared. Enable NX. [ARM] nommu: trivial patch for arch/arm/lib/Makefile [ARM] 3416/1: Update LART site URL [ARM] 3415/1: Akita: Add missing EXPORT_SYMBOL [ARM] 3414/1: ep93xx: reset ethernet controller before uncompressing
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Linus Torvalds authored
* master.kernel.org:/home/rmk/linux-2.6-serial: [SERIAL] Provide Cirrus EP93xx AMBA PL010 serial support. [SERIAL] amba-pl010: allow platforms to specify modem control method [SERIAL] Remove obsoleted au1x00_uart driver [SERIAL] Small time UART configuration fix for AU1100 processor
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Lennert Buytenhek authored
Patch from Lennert Buytenhek This patch adds support for the Intel ixp23xx series of CPUs. The ixp23xx is an XSC3 based CPU with 512K of L2 cache, a 64bit 66MHz PCI interface, two DDR RAM interfaces, QDR RAM interfaces, two gigabit MACs, two 10/100 MACs, expansion bus, four microengines, a Media and Switch Fabric unit almost identical to the one on the ixp2400, two xscale (8250ish) UARTs and a bunch of other stuff. This patch adds the core ixp23xx support code, and support for the ADI Engineering Roadrunner, Intel IXDP2351, and IP Fabrics Double Espresso platforms. Signed-off-by:
Deepak Saxena <dsaxena@plexity.net> Signed-off-by:
Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk>
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Lennert Buytenhek authored
Patch from Lennert Buytenhek Add support for the LogicPD PXA270 Card Engine. Signed-off-by:
Nicolas Pitre <nico@cam.org> Signed-off-by:
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Lennert Buytenhek authored
Patch from Lennert Buytenhek Add ixp23xx defconfig. Signed-off-by:
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Lennert Buytenhek authored
Patch from Lennert Buytenhek This patch adds support for the new XScale v3 core. This is an ARMv5 ISA core with the following additions: - L2 cache - I/O coherency support (on select chipsets) - Low-Locality Reference cache attributes (replaces mini-cache) - Supersections (v6 compatible) - 36-bit addressing (v6 compatible) - Single instruction cache line clean/invalidate - LRU cache replacement (vs round-robin) I attempted to merge the XSC3 support into proc-xscale.S, but XSC3 cores have separate errata and have to handle things like L2, so it is simpler to keep it separate. L2 cache support is currently a build option because the L2 enable bit must be set before we enable the MMU and there is no easy way to capture command line parameters at this point. There are still optimizations that can be done such as using LLR for copypage (in theory using the exisiting mini-cache code) but those can be addressed down the road. Signed-off-by:
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Linus Torvalds authored
* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] cpufreq_conservative: keep ignore_nice_load and freq_step values when reselected [CPUFREQ] powernow: remove private for_each_cpu_mask() [CPUFREQ] hotplug cpu fix for powernow-k8 [PATCH] cpufreq_ondemand: add range check [PATCH] cpufreq_ondemand: keep ignore_nice_load value when it is reselected [PATCH] cpufreq_ondemand: Warn if it cannot run due to too long transition latency [PATCH] cpufreq_conservative: alternative initialise approach [PATCH] cpufreq_conservative: make for_each_cpu() safe [PATCH] cpufreq_conservative: alter default responsiveness [PATCH] cpufreq_conservative: aligning of codebase with ondemand
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git://brick.kernel.dk/data/git/linux-2.6-blockLinus Torvalds authored
* 'cfq-merge' of git://brick.kernel.dk/data/git/linux-2.6-block: [BLOCK] cfq-iosched: seek and async performance fixes [PATCH] ll_rw_blk: fix 80-col offender in put_io_context() [PATCH] cfq-iosched: small cfq_choose_req() optimization [PATCH] [BLOCK] cfq-iosched: change cfq io context linking from list to tree
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Linus Torvalds authored
* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Implement futex_atomic_cmpxchg_inatomic().
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Mattia Dongili authored
Keep the value of ignore_nice_load and freq_step of the conservative governor after the governor is deselected and reselected. Signed-off-by:
Mattia Dongili <malattia@linux.it> Signed-off-by:
Dave Jones <davej@redhat.com>
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Andrew Morton authored
kernel/futex_compat.c: In function `compat_sys_futex': kernel/futex_compat.c:140: warning: passing arg 1 of `do_futex' makes integer from pointer without a cast kernel/futex_compat.c:140: warning: passing arg 5 of `do_futex' makes integer from pointer without a cast Not sure what Ingo was thinking of here. Put the casts back in. Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Jesper Juhl authored
Get rid of unnessesary casts of kmalloc() return value in sound/ Signed-off-by:
Jesper Juhl <jesper.juhl@gmail.com> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Alexey Dobriyan authored
Fix a lot of typos. Eyeballed by jmc@ in OpenBSD. Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Jesper Juhl authored
Fix a few trivial mistakes in Documentation/cputopology.txt Signed-off-by:
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Jesper Juhl authored
Fix "signed vs unsigned" in nmi_watchdog_tick. Signed-off-by:
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Jesper Juhl authored
vfree() does it's own NULL checking, no need for explicit check before calling it. Signed-off-by:
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Jesper Juhl authored
There's no need to check pointers for NULL before handing them to vfree(). Signed-off-by:
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Jesper Juhl authored
vfree() checks for NULL, no need to do it explicitly. Signed-off-by:
Zach Brown <zab@zabbo.net> Signed-off-by:
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Jesper Juhl authored
There's no need to check the vfree() argument for NULL. Signed-off-by:
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Matthias Gehre authored
Replace all occurences of 0xff.. in calls to function pci_set_dma_mask() and pci_set_consistant_dma_mask() with the corresponding DMA_xBIT_MASK from linux/dma-mapping.h. Signed-off-by:
Matthias Gehre <M.Gehre@gmx.de> Signed-off-by:
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Marcelo Feitoza Parisi authored
They deal with wrapping correctly and are nicer to read. Signed-off-by:
Marcelo Feitoza Parisi <marcelo@feitoza.com.br> Signed-off-by:
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Marcelo Feitoza Parisi authored
They deal with wrapping correctly and are nicer to read. Signed-off-by:
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Marcelo Feitoza Parisi authored
It deals with wrapping correctly and is nicer to read. Signed-off-by:
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Marcelo Feitoza Parisi authored
They deal with wrapping correctly and are nicer to read. Signed-off-by:
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Adrian Bunk authored
Nowadays, even Debian stable ships a microcode_ctl utility recent enough to no longer use this ioctl. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Acked-by:
Tigran Aivazian <tigran_aivazian@symantec.com> Signed-off-by:
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Jesper Juhl authored
Add missing files and descriptions to Documentation/filesystems/00-INDEX Signed-off-by:
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Arjan van de Ven authored
This is a conversion to make the various file_operations structs in fs/ const. Basically a regexp job, with a few manual fixups The goal is both to increase correctness (harder to accidentally write to shared datastructures) and reducing the false sharing of cachelines with things that get dirty in .data (while .rodata is nicely read only and thus cache clean) Signed-off-by:
Arjan van de Ven <arjan@infradead.org> Signed-off-by:
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Arjan van de Ven authored
Mark the f_ops members of inodes as const, as well as fix the ripple-through this causes by places that copy this f_ops and then "do stuff" with it. Signed-off-by:
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Andrew Morton authored
Tweak the proc setup code so things work OK with const proc_dir_entry.proc_fops. Signed-off-by:
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KAMEZAWA Hiroyuki authored
Replace for_each_cpu with for_each_possible_cpu. Modifies occurences in documentaion. for_each_cpu in whatisRCU.txt should be for_each_online_cpu ??? (I'm not sure..) Signed-off-by:
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by:
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KAMEZAWA Hiroyuki authored
This patch replaces for_each_cpu with for_each_possible_cpu. under arch/i386. Signed-off-by:
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KAMEZAWA Hiroyuki authored
This patch replaces for_each_cpu with for_each_possible_cpu. Signed-off-by:
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KAMEZAWA Hiroyuki authored
This patch replaces for_each_cpu with for_each_possible_cpu. Signed-off-by:
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KAMEZAWA Hiroyuki authored
replaces for_each_cpu with for_each_possible_cpu(). Signed-off-by:
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KAMEZAWA Hiroyuki authored
for_each_cpu() is a for-loop over cpu_possible_map. for_each_online_cpu is for-loop cpu over cpu_online_map. .....for_each_cpu() is not sufficiently explicit and can lead to mistakes. This patch adds for_each_possible_cpu() in preparation for the removal of for_each_cpu(). Signed-off-by:
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Vadim Lobanov authored
Remove an unnecessary level of indirection in allocating and freeing select bits, as per the select_bits_alloc() and select_bits_free() functions. Both select.c and compat.c are updated. Signed-off-by:
Vadim Lobanov <vlobanov@speakeasy.net> Signed-off-by:
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Eric Dumazet authored
Cc: Andi Kleen <ak@muc.de> Signed-off-by:
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Andi Kleen authored
Optimize select and poll by a using stack space for small fd sets This brings back an old optimization from Linux 2.0. Using the stack is faster than kmalloc. On a Intel P4 system it speeds up a select of a single pty fd by about 13% (~4000 cycles -> ~3500) It also saves memory because a daemon hanging in select or poll will usually save one or two less pages. This can add up - e.g. if you have 10 daemons blocking in poll/select you save 40KB of memory. I did a patch for this long ago, but it was never applied. This version is a reimplementation of the old patch that tries to be less intrusive. I only did the minimal changes needed for the stack allocation. The cut off point before external memory is allocated is currently at 832bytes. The system calls always allocate this much memory on the stack. These 832 bytes are divided into 256 bytes frontend data (for the select bitmaps of the pollfds) and the rest of the space for the wait queues used by the low level drivers. There are some extreme cases where this won't work out for select and it falls back to allocating memory too early - especially with very sparse large select bitmaps - but the majority of processes who only have a small number of file descriptors should be ok. [TBD: 832/256 might not be the best split for select or poll] I suspect more optimizations might be possible, but they would be more complicated. One way would be to cache the select/poll context over multiple system calls because typically the input values should be similar. Problem is when to flush the file descriptors out though. Signed-off-by:
Andi Kleen <ak@suse.de> Cc: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by:
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