17 Oct, 2007
40 commits
-
This patch cleans up duplicate includes in
drivers/char/Signed-off-by: Jesper Juhl
Cc: Richard Purdie
Cc: Ralf Baechle
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Rrrr, addition of sysctl.h to fs.h was't very smart, because simple
editing of the former will buy you big recompile, where it shouldn't
have to.Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Driver for the CompactFlash slot on the PA Semi Electra eval board. It's
a simple device sitting on localbus, with interrupts and detect/voltage
control over GPIO.The driver is implemented as an of_platform driver, and adds localbus
as a bus being probed by the of_platform framework.[akpm@linux-foundation.org: cleanups]
[olof@lixom.net: fix build]
Signed-off-by: Olof Johansson
Cc: Christoph Hellwig
Cc: Milton Miller
Cc: Kumar Gala
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Dominik Brodowski
Signed-off-by: Olof Johansson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Denis Cheng
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
fs/proc/mmu.c consists of only one function which uses only:
1) struct vmalloc_info *
2) struct vm_struct *
3) struct vmalloc_info
4) vmlist
5) VMALLOC_TOTAL, VMALLOC_START, VMALLOC_END
6) read_lock, read_unlock
7) vmlist_lock
8) struct vm_structThis gives us linux/spinlock.h, asm/pgtable.h, "internal.h", linux/vmalloc.h.
asm/pgtable.h uses PKMAP_BASE on i386, for which asm/highmem.h is needed.
But, linux/highmem.h is actually used to make it compile everywhere.
I'll deal later with this particular i386 surprise.Cross-compile tested on many archs and configs.
Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
do_poll() checks signal_pending() but returns 0 when interrupted. This means
the caller has to check signal_pending() again.Change it to return -EINTR when signal_pending() and count == 0.
Signed-off-by: Oleg Nesterov
Cc: Andi Kleen
Cc: Davide Libenzi
Cc: Vadim Lobanov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Cleanup. Lessens both the source and compiled code (100 bytes) and imho makes
the code much more understandable.With this patch "struct poll_list *head" always points to on-stack stack_pps,
so we can remove all "is it on-stack" and "was it initialized" checks.Also, move poll_initwait/poll_freewait and -EINTR detection closer to the
do_poll()'s callsite.[akpm@linux-foundation.org: fix warning (size_t != uint)]
Signed-off-by: Oleg Nesterov
Looks-good-to: Andi Kleen
Cc: Davide Libenzi
Cc: Vadim Lobanov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Diego Woitasen
Cc: Christoph Hellwig
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
It makes more sense to make instrumentation support experimental on a
case-by-case basis.Signed-off-by: Robert P. J. Day
Cc: Andi Kleen
Cc: "Luck, Tony"
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: "David S. Miller"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Philippe De Muyter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- There are no lists in fs/romfs/inode.c, so using list_entry
is a bit confusing. Replace it with container_of.- It is unnecessary to cast the return value of
kmem_cache_alloc, since it returns a void* pointer.Signed-off-by: WANG Cong
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This memcpy looks so strange, in fact it's merely a pointer dereference, so I
change the parameter's type to refer it more directly, this could make the
memcpy not needed anymore.In the function nbd_read_stat where nbd_find_request is only once called, the
parameter served should be transformed accordingly.Signed-off-by: Denis Cheng
Cc: Paul Clements
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Thus the traverse of the loop may delete nodes, use the safe version.
Signed-off-by: Denis Cheng
Cc: Paul Clements
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
DECLARE_MUTEX_LOCKED was used for semaphores used as completions and we've
got rid of them. Well, except for one in libusual that the maintainer
explicitly wants to keep as semaphore. So convert that useage to an
explicit sema_init and kill of DECLARE_MUTEX_LOCKED so that new code is
reminded to use a completion.Signed-off-by: Christoph Hellwig
Acked-by: "Satyam Sharma"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
SHMLBA cant possible be used in userspace, see sparc versions of that header.
Do not export asm/shmparam.h during make headers_install_all
This removes another uservisible place of PAGE_SIZESigned-off-by: Olaf Hering
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: "David S. Miller"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The Synchronous Serial Controller (SSC) on Atmel microprocessors are
capable of tranceiving many frame based protocols, like I2S. Tested on the
AT32AP7000/ATSTK1000.This driver is used in the ALSA sound driver for the AT73C213 external DAC
on the ATSTK1000 development board for AVR32. This sound driver will be
submitted soon.Hardware documentation can be found in the AT32AP7000 data sheet, which can
be downloaded from
http://www.atmel.com/dyn/products/datasheets.asp?family_id=682[akpm@linux-foundation.org: init spinlock at compile time]
Signed-off-by: Hans-Christian Egtvedt
Acked-by: Haavard Skinnemoen
Cc: David Brownell
Cc: Andrew Victor
Cc: Patrice Vilchez
Cc: Nicolas Ferre
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Replace worthless comments with actual preprocessor errors when including
the wrong versions of the compiler.h files.[akpm@linux-foundation.org: make it work]
Signed-off-by: Robert P. J. Day
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Use mutex instead of semaphore in fs/isofs/compress.c, and remove an
unnecessary variable.Signed-off-by: Dave Young
Acked-by: H. Peter Anvin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
These aren't modular, so SLAB_PANIC is OK.
Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Control the trigger limit for softlockup warnings. This is useful for
debugging softlockups, by lowering the softlockup_thresh to identify
possible softlockups earlier.This patch:
1. Adds a sysctl softlockup_thresh with valid values of 1-60s
(Higher value to disable false positives)
2. Changes the softlockup printk to print the cpu softlockup time[akpm@linux-foundation.org: Fix various warnings and add definition of "two"]
Signed-off-by: Ravikiran Thirumalai
Signed-off-by: Shai Fultheim
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
kernel/softirq.c grew a few style uncleanlinesses in the past few
months, clean that up. No functional changes:text data bss dec hex filename
1126 76 4 1206 4b6 softlockup.o.before
1129 76 4 1209 4b9 softlockup.o.after( the 3 bytes .text increase is due to the "" appended to one of
the printk messages. )Signed-off-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Improve the debuggability of kernel lockups by enhancing the debug
output of the softlockup detector: print the task that causes the lockup
and try to print a more intelligent backtrace.The old format was:
BUG: soft lockup detected on CPU#1!
[] show_trace_log_lvl+0x19/0x2e
[] show_trace+0x12/0x14
[] dump_stack+0x14/0x16
[] softlockup_tick+0xbe/0xd0
[] run_local_timers+0x12/0x14
[] update_process_times+0x3e/0x63
[] tick_sched_timer+0x7c/0xc0
[] hrtimer_interrupt+0x135/0x1ba
[] smp_apic_timer_interrupt+0x6e/0x80
[] apic_timer_interrupt+0x33/0x38
[] syscall_call+0x7/0xb
=======================The new format is:
BUG: soft lockup detected on CPU#1! [prctl:2363]
Pid: 2363, comm: prctl
EIP: 0060:[] CPU: 1
EIP is at sys_prctl+0x24/0x18c
EFLAGS: 00000213 Not tainted (2.6.22-cfs-v20 #26)
EAX: 00000001 EBX: 000003e7 ECX: 00000001 EDX: f6df0000
ESI: 000003e7 EDI: 000003e7 EBP: f6df0fb0 DS: 007b ES: 007b FS: 00d8
CR0: 8005003b CR2: 4d8c3340 CR3: 3731d000 CR4: 000006d0
[] show_trace_log_lvl+0x19/0x2e
[] show_trace+0x12/0x14
[] show_regs+0x1ab/0x1b3
[] softlockup_tick+0xef/0x108
[] run_local_timers+0x12/0x14
[] update_process_times+0x3e/0x63
[] tick_sched_timer+0x7c/0xc0
[] hrtimer_interrupt+0x135/0x1ba
[] smp_apic_timer_interrupt+0x6e/0x80
[] apic_timer_interrupt+0x33/0x38
[] syscall_call+0x7/0xb
=======================Note that in the old format we only knew that some system call locked
up, we didnt know _which_. With the new format we know that it's at a
specific place in sys_prctl(). [which was where i created an artificial
kernel lockup to test the new format.]This is also useful if the lockup happens in user-space - the user-space
EIP (and other registers) will be printed too. (such a lockup would
either suggest that the task was running at SCHED_FIFO:99 and looping
for more than 10 seconds, or that the softlockup detector has a
false-positive.)The task name is printed too first, just in case we dont manage to print
a useful backtrace.[satyam@infradead.org: fix warning]
Signed-off-by: Ingo Molnar
Signed-off-by: Satyam Sharma
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The softlockup detector would like to use get_irq_regs(), so generalize the
availability on every Linux architecture.(It is fine for an architecture to always return NULL to get_irq_regs(),
which it does by default.)Signed-off-by: Ingo Molnar
Cc: Ian Molton
Cc: Kumar Gala
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Mikael Starvik
Cc: Miles Bader
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
this Xen related commit:
commit 966812dc98e6a7fcdf759cbfa0efab77500a8868
Author: Jeremy Fitzhardinge
Date: Tue May 8 00:28:02 2007 -0700Ignore stolen time in the softlockup watchdog
broke the softlockup watchdog to never report any lockups. (!)
print_timestamp defaults to 0, this makes the following condition
always true:if (print_timestamp < (touch_timestamp + 1) ||
and we'll in essence never report soft lockups.
apparently the functionality of the soft lockup watchdog was never
actually tested with that patch applied ...Signed-off-by: Ingo Molnar
Cc: Jeremy Fitzhardinge
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
sched_clock() is not a reliable time-source, use cpu_clock() instead.
Signed-off-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove the rmb() from mce_log(), since the immunized version of
rcu_dereference() makes it unnecessary.Signed-off-by: Paul E. McKenney
Cc: Ingo Molnar
Cc: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Turns out that compiler writers are a bit more aggressive about optimizing
than one might expect. This patch prevents a number of such optimizations
from messing up rcu_deference(). This is not merely a theoretical problem, as
evidenced by the rmb() in mce_log().Signed-off-by: Paul E. McKenney
Cc: Ingo Molnar
Acked-by: Josh Triplett
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
list_del() hardly can fail, so checking for return value is pointless
(and current code always return 0).Nobody really cared that return value anyway.
Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Switch single-linked binfmt formats list to usual list_head's. This leads
to one-liners in register_binfmt() and unregister_binfmt(). The downside
is one pointer more in struct linux_binfmt. This is not a problem, since
the set of registered binfmts on typical box is very small -- (ELF +
something distro enabled for you).Test-booted, played with executable .txt files, modprobe/rmmod binfmt_misc.
Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- remove the following no longer used functions:
- bitmap.c: reiserfs_claim_blocks_to_be_allocated()
- bitmap.c: reiserfs_release_claimed_blocks()
- bitmap.c: reiserfs_can_fit_pages()- make the following functions static:
- inode.c: restart_transaction()
- journal.c: reiserfs_async_progress_wait()Signed-off-by: Adrian Bunk
Acked-by: Vladimir V. Saveliev
Cc: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This is a writeback-internal marker but we're propagating it all the way back
to userspace!.Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
zone->lock is quite an "inner" lock and mostly constrained to page alloc as
well, so like slab locks, it probably isn't something that is critically
important to document here. However unlike slab locks, zone lock could be
used more widely in future, and page_alloc.c might possibly have more
business to do tricky things with pagecache than does slab. So... I don't
think it hurts to document it.Signed-off-by: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduces new zone flag interface for testing and setting flags:
int zone_test_and_set_flag(struct zone *zone, zone_flags_t flag)
Instead of setting and clearing ZONE_RECLAIM_LOCKED each time shrink_zone() is
called, this flag is test and set before starting zone reclaim. Zone reclaim
starts in __alloc_pages() when a zone's watermark fails and the system is in
zone_reclaim_mode. If it's already in reclaim, there's no need to start again
so it is simply considered full for that allocation attempt.There is a change of behavior with regard to concurrent zone shrinking. It is
now possible for try_to_free_pages() or kswapd to already be shrinking a
particular zone when __alloc_pages() starts zone reclaim. In this case, it is
possible for two concurrent threads to invoke shrink_zone() for a single zone.This change forbids a zone to be in zone reclaim twice, which was always the
behavior, but allows for concurrent try_to_free_pages() or kswapd shrinking
when starting zone reclaim.Cc: Andrea Arcangeli
Cc: Christoph Lameter
Signed-off-by: David Rientjes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There's no reason to sleep in try_set_zone_oom() or clear_zonelist_oom() if
the lock can't be acquired; it will be available soon enough once the zonelist
scanning is done. All other threads waiting for the OOM killer are also
contingent on the exiting task being able to acquire the lock in
clear_zonelist_oom() so it doesn't make sense to put it to sleep.Cc: Andrea Arcangeli
Cc: Christoph Lameter
Signed-off-by: David Rientjes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Preprocess include/linux/oom.h before exporting it to userspace.
Cc: Andrea Arcangeli
Cc: Christoph Lameter
Cc: Alexey Dobriyan
Signed-off-by: David Rientjes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
It's not necessary to include all of linux/sched.h in linux/oom.h. Instead,
simply include prototypes for the relevant structs and include linux/types.h
for gfp_t.Cc: Andrea Arcangeli
Cc: Christoph Lameter
Acked-by: Alexey Dobriyan
Signed-off-by: David Rientjes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since no task descriptor's 'cpuset' field is dereferenced in the execution of
the OOM killer anymore, it is no longer necessary to take callback_mutex.[akpm@linux-foundation.org: restore cpuset_lock for other patches]
Cc: Andrea Arcangeli
Acked-by: Christoph Lameter
Signed-off-by: David Rientjes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Instead of testing for overlap in the memory nodes of the the nearest
exclusive ancestor of both current and the candidate task, it is better to
simply test for intersection between the task's mems_allowed in their task
descriptors. This does not require taking callback_mutex since it is only
used as a hint in the badness scoring.Tasks that do not have an intersection in their mems_allowed with the current
task are not explicitly restricted from being OOM killed because it is quite
possible that the candidate task has allocated memory there before and has
since changed its mems_allowed.Cc: Andrea Arcangeli
Acked-by: Christoph Lameter
Signed-off-by: David Rientjes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Suppresses the extraneous stack and memory dump when a parallel OOM killing
has been found. There's no need to fill the ring buffer with this information
if its already been printed and the condition that triggered the previous OOM
killer has not yet been alleviated.Cc: Andrea Arcangeli
Acked-by: Christoph Lameter
Signed-off-by: David Rientjes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Adds a new sysctl, 'oom_kill_allocating_task', which will automatically kill
the OOM-triggering task instead of scanning through the tasklist to find a
memory-hogging target. This is helpful for systems with an insanely large
number of tasks where scanning the tasklist significantly degrades
performance.Cc: Andrea Arcangeli
Acked-by: Christoph Lameter
Signed-off-by: David Rientjes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
