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    SubjectRe: [patch] voluntary-preempt-2.6.9-rc3-mm3-T3
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    On Thu, 2004-10-07 at 06:52, Ingo Molnar wrote:
    > i've released the -T3 VP patch:
    >
    > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc3-mm3-T3
    >

    Wow, this is a really bad one - 5576 usecs in shmem_truncate! I think
    this was triggered by Mozilla deleting a large video file from /tmp
    which is a tmpfs mount.

    (mozilla-bin/16141): new 5576 us maximum-latency critical section.
    => started at: <shmem_truncate+0x67/0x630>
    => ended at: <shmem_truncate+0x3bc/0x630>
    [<c013d96a>] check_preempt_timing+0x14a/0x1e0
    [<c013d2f5>] __mcount+0x15/0x20
    [<c02dd08a>] preempt_schedule+0xa/0x70
    [<c013dbba>] sub_preempt_count+0x5a/0x90
    [<c016b39c>] shmem_truncate+0x3bc/0x630
    [<c016b39c>] shmem_truncate+0x3bc/0x630
    [<c016b964>] shmem_delete_inode+0x134/0x340
    [<c016b830>] shmem_delete_inode+0x0/0x340
    [<c01991ee>] generic_delete_inode+0xde/0x300
    [<c0189615>] sys_unlink+0xf5/0x150
    [<c0106b47>] syscall_call+0x7/0xb

    Full trace:

    http://krustophenia.net/testresults.php?dataset=2.6.9-rc3-mm3-VP-T3#/var/www/2.6.9-rc3-mm3-VP-T3/shmem-truncate-latency-trace.txt

    Lee

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