- 23 Mar, 2006 40 commits
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Jens Axboe authored
Signed-off-by:Jens Axboe <axboe@suse.de>
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Jens Axboe authored
Original patch from Paul Mundt, sysfs parts removed by me since they were broken. Signed-off-by: -
Benjamin LaHaise authored
The biovec default mempool limit of 256 entries results in over 3MB of RAM being permanently pinned, even on systems with only 128MB of RAM. Since mempool tries to allocate from the system pool first, it makes sense to reduce the size of the mempool fallbacks to a more reasonable limit of 1-5 entries -- enough for the system to be able to make progress even under load. Signed-off-by:
Benjamin LaHaise <bcrl@kvack.org> Acked-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Eric Dumazet authored
Now CONFIG_DEBUG_INITDATA is in, initial percpu data [__per_cpu_start,__per_cpu_end] can be declared as a redzone, and invalid accesses after boot can be detected, at least for i386. We can let non possible cpus percpu data point to this 'redzone' instead of NULL . NULL was not a good choice because part of [0..32768] memory may be readable and invalid accesses may happen unnoticed. If CONFIG_DEBUG_INITDATA is not defined, each non possible cpu points to the initial percpu data (__per_cpu_offset[cpu] == 0), thus invalid accesses wont be detected/crash. This patch also moves __per_cpu_offset[] to read_mostly area to avoid false sharing. Signed-off-by:
Eric Dumazet <dada1@cosmosbay.com> Signed-off-by:
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Andrew Morton authored
When we stop allocating percpu memory for not-possible CPUs we must not touch the percpu data for not-possible CPUs at all. The correct way of doing this is to test cpu_possible() or to use for_each_cpu(). This patch is a kernel-wide sweep of all instances of NR_CPUS. I found very few instances of this bug, if any. But the patch converts lots of open-coded test to use the preferred helper macros. Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Acked-by:
Kyle McMartin <kyle@parisc-linux.org> Cc: Anton Blanchard <anton@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: Andi Kleen <ak@muc.de> Cc: Christian Zankel <chris@zankel.net> Cc: Philippe Elie <phil.el@wanadoo.fr> Cc: Nathan Scott <nathans@sgi.com> Cc: Jens Axboe <axboe@suse.de> Cc: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by:
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Eric Dumazet authored
percpu_data blindly allocates bootmem memory to store NR_CPUS instances of cpudata, instead of allocating memory only for possible cpus. This patch saves ram, allocating num_possible_cpus() (instead of NR_CPUS) instances. Signed-off-by:
"David S. Miller" <davem@davemloft.net> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Jens Axboe <axboe@suse.de> Acked-by:
Ingo Molnar <mingo@elte.hu> Cc: Jens Axboe <axboe@suse.de> Cc: Anton Blanchard <anton@samba.org> Acked-by:
William Irwin <wli@holomorphy.com> Signed-off-by:
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Benjamin LaHaise authored
Eliminate a handful of cache references by keeping current in a register instead of reloading (helps x86) and avoiding the overhead of a function call. Inlining eventpoll_init_file() saves 24 bytes. Also reorder file initialization to make writes occur more sequentially. Signed-off-by:
Benjamin LaHaise <bcrl@linux.intel.com> Cc: Davide Libenzi <davidel@xmailserver.org> Signed-off-by:
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Nick Piggin authored
Without branch hints, the very unlikely chance of the loop repeating due to cmpxchg failure is unrolled with gcc-4 that I have tested. Improve this for architectures with a native cas/cmpxchg. llsc archs should try to implement this natively. Signed-off-by:
Nick Piggin <npiggin@suse.de> Cc: Andi Kleen <ak@muc.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by:
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Alexey Dobriyan authored
Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Adrian Bunk authored
This patch makes two needlessly global structs static. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Domen Puncer authored
Item from "2.6 should fix" list. Signed-off-by:
Domen Puncer <domen@coderock.org> Signed-off-by:
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Oleg Nesterov authored
This patch changes the code from: preempt_disable(); for (;;) { ... preempt_disable(); } to: for (;;) { preempt_disable(); ... } which seems more clean to me and saves a couple of bytes for each function. Signed-off-by:Oleg Nesterov <oleg@tv-sign.ru> Acked-by:
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Rene Herman authored
Without the attached, the kernel complains about my BIOS' PNP tables. It was ACKed before, but never merged: http://marc.theaimsgroup.com/?l=linux-kernel&m=110237794007900&w=2 Cc: Adam Belay <ambx1@neo.rr.com> Signed-off-by:
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Andrew Morton authored
Attempt to fix the problem wherein people's oops reports scroll off the screen due to repeated oopsing or to oopses on other CPUs. If this happens the user can reboot with the `pause_on_oops=<seconds>' option. It will allow the first oopsing CPU to print an oops record just a single time. Second oopsing attempts, or oopses on other CPUs will cause those CPUs to enter a tight loop until the specified number of seconds have elapsed. The patch implements the infrastructure generically in the expectation that architectures other than x86 will find it useful. Cc: Dave Jones <davej@codemonkey.org.uk> Signed-off-by:
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Adrian Bunk authored
This patch removes all occurances of _INLINE_ in the kernel. With the exception of tty_flip.h, I've simply removed the inline's since gcc should know best which functions to be inlined. Signed-off-by:
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Andrew Morton authored
Declarations use struct notifier_block on both legs of the ifdef, so move the notifier_block forward declaration outside the ifdef. Signed-off-by:
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Ingo Molnar authored
Consolidate all kernel bug printouts to begin with the "BUG: " string. Makes it easier to find them in large bootup logs. Signed-off-by:
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Alexey Dobriyan authored
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Alexey Dobriyan authored
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Alexey Dobriyan authored
Signed-off-by:
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Alexey Dobriyan authored
Signed-off-by:
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Alexey Dobriyan authored
Signed-off-by:
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Alexey Dobriyan authored
Signed-off-by:
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Oleg Nesterov authored
Cleanup, remove unneeded double copying of current->blocked. Signed-off-by:
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Jes Sorensen authored
Change driver to use kzalloc rather than kmalloc+memset Signed-off-by:
Jes Sorensen <jes@sgi.com> Signed-off-by:
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Arjan van de Ven authored
The fat code uses the fat_lock always in a mutex way (taking and releasing the lock in the same function), the patch below converts it into the new mutex primitive. Please consider this patch for the code. Signed-off-by:
Arjan van de Ven <arjan@infradead.org> Acked-by:
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Ingo Molnar authored
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Extracted for OSS/Free changes from Ingo's original patches. Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Ashutosh Naik authored
This patch converts the module_mutex semaphore to a mutex. Signed-off-by:
Ashutosh Naik <ashutosh.naik@gmail.com> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Arjan van de Ven authored
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by:
Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Signed-off-by:
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Ingo Molnar authored
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by:
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Ingo Molnar authored
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by:
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Ingo Molnar authored
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by:
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Arjan van de Ven authored
ext3's truncate_sem is always released in the same function it's taken and it otherwise is a mutex as well.. Signed-off-by:
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Ingo Molnar authored
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by:
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Ingo Molnar authored
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by:
Ian Kent <raven@themaw.net> Signed-off-by:
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Ingo Molnar authored
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by:
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Ingo Molnar authored
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by:
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Ingo Molnar authored
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by:
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Ingo Molnar authored
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by:
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Ingo Molnar authored
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by:
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