Re: Kernel 2.6.9 Multiple Page Allocation Failures

From: Andrew Morton (akpm_at_osdl.org)
Date: 11/10/04

  • Next message: Robert Love: "Re: mmap vs. O_DIRECT" 
    Date:	Wed, 10 Nov 2004 13:09:43 -0800
To: Lukas Hejtmanek <xhejtman@mail.muni.cz>

    Lukas Hejtmanek <xhejtman@mail.muni.cz> wrote:
    >
    > 2.6.10-rc1-mm3 with CONFIG_PREEMPT=y and CONFIG_PREEMPT_BKL=y
    > results with: (and many more xfs related calls)
    >
    > Nov 10 21:21:05 undomiel1 kernel: BUG: using smp_processor_id() in preemptible [00000001] code: swapper/1
    > Nov 10 21:21:05 undomiel1 kernel: caller is xfs_dir2_lookup+0x26/0x157
    > Nov 10 21:21:05 undomiel1 kernel: [<c025dbf4>] smp_processor_id+0xa8/0xb8
    > Nov 10 21:21:05 undomiel1 kernel: [<c020679b>] xfs_dir2_lookup+0x26/0x157
    > Nov 10 21:21:05 undomiel1 kernel: [<c020679b>] xfs_dir2_lookup+0x26/0x157
    > Nov 10 21:21:05 undomiel1 kernel: [<c025a4e7>] send_uevent+0x148/0x1a0

    That's XFS_STATS_INC() and friends.

    I don't think there's really a bug here. It's a tiny bit racy, but that
    will merely cause a small inaccuracy in the stats.

    I think I'll just drop the debug patch. You can disable
    CONFIG_DEBUG_PREEMPT to shut things up.

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  • Next message: Robert Love: "Re: mmap vs. O_DIRECT"

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