Eric Lee / linux-smarc-t335x-v3.2

24 Sep, 2006

1 commit

23 Sep, 2006

1 commit

31 Aug, 2006

1 commit

  • 492dfb489   [SCSI] block: add support for shared tag maps ... Browse Code »

    The current block queue implementation already contains most of the
    machinery for shared tag maps. The only remaining pieces are a way to
    allocate and destroy a tag map independently of the queues (so that
    the maps can be managed on the life cycle of the overseeing entity)

    Acked-by: Jens Axboe
    Signed-off-by: James Bottomley

    James Bottomley
     

21 Aug, 2006

1 commit

  • 9f83e45eb   [PATCH] Fix current_io_context() vs set_task_ioprio() race ... Browse Code »

    I know nothing about io scheduler, but I suspect set_task_ioprio() is not safe.

    current_io_context() initializes "struct io_context", then sets ->io_context.
    set_task_ioprio() running on another cpu may see the changes out of order, so
    ->set_ioprio(ioc) may use io_context which was not initialized properly.

    Signed-off-by: Oleg Nesterov
    Signed-off-by: Jens Axboe

    Oleg Nesterov
     

06 Jul, 2006

1 commit

04 Jul, 2006

1 commit

  • 60be6b9a4   [PATCH] lockdep: annotate on-stack completions ... Browse Code »

    lockdep needs to have the waitqueue lock initialized for on-stack waitqueues
    implicitly initialized by DECLARE_COMPLETION(). Annotate on-stack completions
    accordingly.

    Has no effect on non-lockdep kernels.

    Signed-off-by: Ingo Molnar
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ingo Molnar
     

01 Jul, 2006

3 commits

  • 22a3e233c   Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial ... Browse Code »

    * git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial:
    Remove obsolete #include
    remove obsolete swsusp_encrypt
    arch/arm26/Kconfig typos
    Documentation/IPMI typos
    Kconfig: Typos in net/sched/Kconfig
    v9fs: do not include linux/version.h
    Documentation/DocBook/mtdnand.tmpl: typo fixes
    typo fixes: specfic -> specific
    typo fixes in Documentation/networking/pktgen.txt
    typo fixes: occuring -> occurring
    typo fixes: infomation -> information
    typo fixes: disadvantadge -> disadvantage
    typo fixes: aquire -> acquire
    typo fixes: mecanism -> mechanism
    typo fixes: bandwith -> bandwidth
    fix a typo in the RTC_CLASS help text
    smb is no longer maintained

    Manually merged trivial conflict in arch/um/kernel/vmlinux.lds.S

    Linus Torvalds
     
  • f8891e5e1   [PATCH] Light weight event counters ... Browse Code »

    The remaining counters in page_state after the zoned VM counter patches
    have been applied are all just for show in /proc/vmstat. They have no
    essential function for the VM.

    We use a simple increment of per cpu variables. In order to avoid the most
    severe races we disable preempt. Preempt does not prevent the race between
    an increment and an interrupt handler incrementing the same statistics
    counter. However, that race is exceedingly rare, we may only loose one
    increment or so and there is no requirement (at least not in kernel) that
    the vm event counters have to be accurate.

    In the non preempt case this results in a simple increment for each
    counter. For many architectures this will be reduced by the compiler to a
    single instruction. This single instruction is atomic for i386 and x86_64.
    And therefore even the rare race condition in an interrupt is avoided for
    both architectures in most cases.

    The patchset also adds an off switch for embedded systems that allows a
    building of linux kernels without these counters.

    The implementation of these counters is through inline code that hopefully
    results in only a single instruction increment instruction being emitted
    (i386, x86_64) or in the increment being hidden though instruction
    concurrency (EPIC architectures such as ia64 can get that done).

    Benefits:
    - VM event counter operations usually reduce to a single inline instruction
    on i386 and x86_64.
    - No interrupt disable, only preempt disable for the preempt case.
    Preempt disable can also be avoided by moving the counter into a spinlock.
    - Handling is similar to zoned VM counters.
    - Simple and easily extendable.
    - Can be omitted to reduce memory use for embedded use.

    References:

    RFC http://marc.theaimsgroup.com/?l=linux-kernel&m=113512330605497&w=2
    RFC http://marc.theaimsgroup.com/?l=linux-kernel&m=114988082814934&w=2
    local_t http://marc.theaimsgroup.com/?l=linux-kernel&m=114991748606690&w=2
    V2 http://marc.theaimsgroup.com/?t=115014808400007&r=1&w=2
    V3 http://marc.theaimsgroup.com/?l=linux-kernel&m=115024767022346&w=2
    V4 http://marc.theaimsgroup.com/?l=linux-kernel&m=115047968808926&w=2

    Signed-off-by: Christoph Lameter
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Lameter
     
  • 6ab3d5624   Remove obsolete #include <linux/config.h> ... Browse Code »

    Signed-off-by: Jörn Engel
    Signed-off-by: Adrian Bunk

    Jörn Engel
     

28 Jun, 2006

2 commits

27 Jun, 2006

1 commit

  • d6e05edc5   spelling fixes ... Browse Code »

    acquired (aquired)
    contiguous (contigious)
    successful (succesful, succesfull)
    surprise (suprise)
    whether (weather)
    some other misspellings

    Signed-off-by: Andreas Mohr
    Signed-off-by: Adrian Bunk

    Andreas Mohr
     

23 Jun, 2006

4 commits

  • 8269730b3   [BLOCK] Fix bounce limit address check ... Browse Code »

    Do a safer check for when to enable DMA. Currently we enable ISA DMA
    for cases that do not need it, resulting in OOM conditions when ZONE_DMA
    runs out of space.

    Signed-off-by: Jens Axboe

    Andi Kleen
     
  • b31dc66a5   [PATCH] Kill PF_SYNCWRITE flag ... Browse Code »

    A process flag to indicate whether we are doing sync io is incredibly
    ugly. It also causes performance problems when one does a lot of async
    io and then proceeds to sync it. Part of the io will go out as async,
    and the other part as sync. This causes a disconnect between the
    previously submitted io and the synced io. For io schedulers such as CFQ,
    this will cause us lost merges and suboptimal behaviour in scheduling.

    Remove PF_SYNCWRITE completely from the fsync/msync paths, and let
    the O_DIRECT path just directly indicate that the writes are sync
    by using WRITE_SYNC instead.

    Signed-off-by: Jens Axboe

    Jens Axboe
     
  • a038e2536   [PATCH] blk_start_queue() must be called with irq disabled - add warning ... Browse Code »

    The queue lock can be taken from interrupts so it must always be taken with
    irq disabling primitives. Some primitives already verify this.
    blk_start_queue() is called under this lock, so interrupts must be
    disabled.

    Also document this requirement clearly in blk_init_queue(), where the queue
    spinlock is set.

    Signed-off-by: Paolo 'Blaisorblade' Giarrusso
    Signed-off-by: Andrew Morton
    Signed-off-by: Jens Axboe

    Paolo 'Blaisorblade' Giarrusso
     
  • 626ab0e69   [PATCH] list: use list_replace_init() instead of list_splice_init() ... Browse Code »

    list_splice_init(list, head) does unneeded job if it is known that
    list_empty(head) == 1. We can use list_replace_init() instead.

    Signed-off-by: Oleg Nesterov
    Acked-by: David S. Miller
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Oleg Nesterov
     

24 May, 2006

1 commit

  • fd0ff8aa1   [PATCH] blk: fix gendisk->in_flight accounting during barrier sequence ... Browse Code »

    While executing barrrier sequence, the bar_rq which carries actual
    write was accounted as normal IO on completion, while it wasn't on
    queueing. This caused gendisk->in_flight to be decremented by 1 after
    each barrier thus messed up statistics.

    This patch makes bar_rq not accounted as normal IO. As the containing
    barrier request as a whole is accounted, part of it shouldn't be.

    Signed-off-by: Tejun Heo
    Signed-off-by: Jens Axboe
    Signed-off-by: Linus Torvalds

    Jens Axboe
     

12 May, 2006

1 commit

  • dac07ec12   [BLOCK] limit request_fn recursion ... Browse Code »

    Don't recurse back into the driver even if the unplug threshold is met,
    when the driver asks for a requeue. This is both silly from a logical
    point of view (requeues typically happen due to driver/hardware
    shortage), and also dangerous since we could hit an endless request_fn
    -> requeue -> unplug -> request_fn loop and crash on stack overrun.

    Also limit blk_run_queue() to one level of recursion, similar to how
    blk_start_queue() works.

    This patch fixed a real problem with SLES10 and lpfc, and it could hit
    any SCSI lld that returns non-zero from it's ->queuecommand() handler.

    Signed-off-by: Jens Axboe
    Signed-off-by: Linus Torvalds

    Jens Axboe
     

26 Apr, 2006

1 commit

  • 649bbaa48   [PATCH] Remove __devinitdata from notifier block definitions ... Browse Code »

    Few of the notifier_chain_register() callers use __devinitdata in the
    definition of notifier_block data structure. It is incorrect as the
    data structure should be available after the initializations (they do
    not unregister them during initializations).

    This was leading to an oops when notifier_chain_register() call is
    invoked for those callback chains after initialization.

    This patch fixes all such usages to _not_ have the notifier_block data
    structure in the init data section.

    Signed-off-by: Chandra Seetharaman
    Signed-off-by: Linus Torvalds

    Chandra Seetharaman
     

20 Apr, 2006

1 commit

02 Apr, 2006

1 commit

29 Mar, 2006

2 commits

28 Mar, 2006

4 commits

27 Mar, 2006

2 commits

24 Mar, 2006

1 commit

19 Mar, 2006

4 commits

09 Mar, 2006

1 commit

08 Feb, 2006

1 commit

  • 30e9656cc   [PATCH] block: implement elv_insert and use it (fix ordcolor flipping bug) ... Browse Code »

    q->ordcolor must only be flipped on initial queueing of a hardbarrier
    request.

    Constructing ordered sequence and requeueing used to pass through
    __elv_add_request() which flips q->ordcolor when it sees a barrier
    request.

    This patch separates out elv_insert() from __elv_add_request() and uses
    elv_insert() when constructing ordered sequence and requeueing.
    elv_insert() inserts the given request at the specified position and
    does nothing else.

    Signed-off-by: Tejun Heo
    Acked-by: Jens Axboe
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Tejun Heo
     

06 Feb, 2006

2 commits

  • 9a7a67af8   [PATCH] fix ordering on requeued request drainage ... Browse Code »

    Previously, if a fs request which was being drained failed and got
    requeued, blk_do_ordered() didn't allow it to be reissued, which causes
    queue stall. This patch makes blk_do_ordered() use the sequence of each
    request to determine whether a request can be issued or not. This fixes
    the bug and simplifies code.

    Signed-off-by: Tejun Heo
    Acked-by: Jens Axboe
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jens Axboe
     
  • 88a2a4ac6   [PATCH] percpu data: only iterate over possible CPUs ... Browse Code »

    percpu_data blindly allocates bootmem memory to store NR_CPUS instances of
    cpudata, instead of allocating memory only for possible cpus.

    As a preparation for changing that, we need to convert various 0 -> NR_CPUS
    loops to use for_each_cpu().

    (The above only applies to users of asm-generic/percpu.h. powerpc has gone it
    alone and is presently only allocating memory for present CPUs, so it's
    currently corrupting memory).

    Signed-off-by: Eric Dumazet
    Cc: "David S. Miller"
    Cc: James Bottomley
    Acked-by: Ingo Molnar
    Cc: Jens Axboe
    Cc: Anton Blanchard
    Acked-by: William Irwin
    Cc: Andi Kleen
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Eric Dumazet
     

02 Feb, 2006

1 commit

  • 3eaf840e0   [PATCH] device-mapper disk statistics: timing ... Browse Code »

    Record I/O timing statistics

    The start time is added to struct dm_io, an existing structure allocated
    privately internally within dm and attached to each incoming bio.

    We export disk_round_stats() from block/ll_rw_blk.c instead of creating a
    private clone.

    Signed-off-by: Jun'ichi "Nick" Nomura
    Signed-off-by: Alasdair G Kergon
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jun'ichi "Nick" Nomura
     

31 Jan, 2006

1 commit