Eric Lee / smarc-fsl-linux-kernel

28 Jan, 2008

1 commit

  • 6da127ad0   blktrace: Add blktrace ioctls to SCSI generic devices ... Browse Code »

    Since the SCSI layer uses the request queues from the block layer, blktrace can
    also be used to trace the requests to all SCSI devices (like SCSI tape drives),
    not only disks. The only missing part is the ioctl interface to start and stop
    tracing.

    This patch adds the SETUP, START, STOP and TEARDOWN ioctls from blktrace to the
    sg device files. With this change, blktrace can be used for SCSI devices like
    for disks, e.g.: blktrace -d /dev/sg1 -o - | blkparse -i -

    Signed-off-by: Christof Schmitt
    Signed-off-by: Jens Axboe

    Christof Schmitt
     

11 Jan, 2008

2 commits

  • 11a57153e   blktrace: kill the unneeded initcall ... Browse Code »

    It just inits the mutex, we can do that with DEFINE_MUTEX() instead.

    Signed-off-by: Jens Axboe

    Jens Axboe
     
  • 2997c8c4a   block: fix blktrace timestamps ... Browse Code »

    David Dillow reported broken blktrace timestamps. The reason
    is cpu_clock() which is not a global time source.

    Fix bkltrace timestamps by using ktime_get() like the networking
    code does for packet timestamps. This also removes a whole lot
    of complexity from bkltrace.c and shrinks the code by 500 bytes:

    text data bss dec hex filename
    2888 124 44 3056 bf0 blktrace.o.before
    2390 116 44 2550 9f6 blktrace.o.after

    Signed-off-by: Ingo Molnar
    Signed-off-by: Jens Axboe

    Ingo Molnar
     

27 Nov, 2007

1 commit

  • 35fc51e7a   blktrace: Make sure BLKTRACETEARDOWN does the full cleanup. ... Browse Code »

    if blktrace program segfault it will not be able
    to call BLKTRACETEARDOWN. Now if we run the blktrace
    again that would result in a failure to create the
    block/ debugfs directory.This will result
    in blk_remove_root() to be called which will set
    blk_tree_root to NULL. But the debugfs block dir
    still exist because it contain subdirectory.

    Now if we try to fix it using BLKTRACETEARDOWN
    it won't work because blk_tree_root is NULL.

    Fix the same.

    Tested as below

    root@qemu-image:/home/kvaneesh/blktrace# ./blktrace -d /dev/hdc
    Segmentation fault
    root@qemu-image:/home/kvaneesh/blktrace# ./blktrace -d /dev/hdc
    BLKTRACESETUP: No such file or directory
    Failed to start trace on /dev/hdc
    root@qemu-image:/home/kvaneesh/blktrace# ./blktrace -k /dev/hdc
    root@qemu-image:/home/kvaneesh/blktrace# ./blktrace -d /dev/hdc

    Signed-off-by: Aneesh Kumar K.V
    Signed-off-by: Jens Axboe

    Aneesh Kumar K.V
     

17 Oct, 2007

1 commit

  • d5a7430dd   Convert cpu_sibling_map to be a per cpu variable ... Browse Code »

    Convert cpu_sibling_map from a static array sized by NR_CPUS to a per_cpu
    variable. This saves sizeof(cpumask_t) * NR unused cpus. Access is mostly
    from startup and CPU HOTPLUG functions.

    Signed-off-by: Mike Travis
    Cc: Andi Kleen
    Cc: Christoph Lameter
    Cc: "Siddha, Suresh B"
    Cc: "David S. Miller"
    Cc: Paul Mackerras
    Cc: Benjamin Herrenschmidt
    Cc: "Luck, Tony"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Mike Travis
     

10 Oct, 2007

1 commit

27 Jul, 2007

1 commit

24 Jul, 2007

1 commit

  • 165125e1e   [BLOCK] Get rid of request_queue_t typedef ... Browse Code »

    Some of the code has been gradually transitioned to using the proper
    struct request_queue, but there's lots left. So do a full sweet of
    the kernel and get rid of this typedef and replace its uses with
    the proper type.

    Signed-off-by: Jens Axboe

    Jens Axboe
     

13 Feb, 2007

1 commit

  • 2b8693c06   [PATCH] mark struct file_operations const 3 ... Browse Code »

    Many struct file_operations in the kernel can be "const". Marking them const
    moves these to the .rodata section, which avoids false sharing with potential
    dirty data. In addition it'll catch accidental writes at compile time to
    these shared resources.

    Signed-off-by: Arjan van de Ven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arjan van de Ven
     

12 Feb, 2007

1 commit

  • 23c887522   [PATCH] Relay: add CPU hotplug support ... Browse Code »

    Mathieu originally needed to add this for tracing Xen, but it's something
    that's needed for any application that can be tracing while cpus are added.

    unplug isn't supported by this patch. The thought was that at minumum a new
    buffer needs to be added when a cpu comes up, but it wasn't worth the effort
    to remove buffers on cpu down since they'd be freed soon anyway when the
    channel was closed.

    [zanussi@us.ibm.com: avoid lock_cpu_hotplug deadlock]
    Signed-off-by: Mathieu Desnoyers
    Cc: Tom Zanussi
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Mathieu Desnoyers
     

08 Dec, 2006

1 commit

  • a12058687   [PATCH] Allow NULL pointers in percpu_free ... Browse Code »

    The patch (as824b) makes percpu_free() ignore NULL arguments, as one would
    expect for a deallocation routine. (Note that free_percpu is #defined as
    percpu_free in include/linux/percpu.h.) A few callers are updated to remove
    now-unneeded tests for NULL. A few other callers already seem to assume
    that passing a NULL pointer to percpu_free() is okay!

    The patch also removes an unnecessary NULL check in percpu_depopulate().

    Signed-off-by: Alan Stern
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Alan Stern
     

04 Dec, 2006

2 commits

01 Dec, 2006

1 commit

  • be1c63411   [PATCH] blktrace: add timestamp message ... Browse Code »

    This adds a new timestamp message to blktrace, giving the timeofday when
    we starting tracing. This helps user space correlate block trace events
    with eg an application strace.

    This requires a (compatible) update to blkparse. The changed blkparse
    is still able to process traces generated by older kernels, and older
    versions of blkparse should silently ignore the new records (because
    they have a pid of 0).

    Signed-off-by: Olaf Kirch
    Signed-off-by: Jens Axboe

    Olaf Kirch
     

01 Oct, 2006

3 commits

30 Sep, 2006

1 commit

27 Sep, 2006

1 commit

  • 8e18e2941   [PATCH] inode_diet: Replace inode.u.generic_ip with inode.i_private ... Browse Code »

    The following patches reduce the size of the VFS inode structure by 28 bytes
    on a UP x86. (It would be more on an x86_64 system). This is a 10% reduction
    in the inode size on a UP kernel that is configured in a production mode
    (i.e., with no spinlock or other debugging functions enabled; if you want to
    save memory taken up by in-core inodes, the first thing you should do is
    disable the debugging options; they are responsible for a huge amount of bloat
    in the VFS inode structure).

    This patch:

    The filesystem or device-specific pointer in the inode is inside a union,
    which is pretty pointless given that all 30+ users of this field have been
    using the void pointer. Get rid of the union and rename it to i_private, with
    a comment to explain who is allowed to use the void pointer. This is just a
    cleanup, but it allows us to reuse the union 'u' for something something where
    the union will actually be used.

    [judith@osdl.org: powerpc build fix]
    Signed-off-by: "Theodore Ts'o"
    Signed-off-by: Judith Lebzelter
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Theodore Ts'o
     

25 Jul, 2006

1 commit

06 Jul, 2006

1 commit

01 Jul, 2006

1 commit

24 Mar, 2006

1 commit