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    SubjectRe: 2.4.20: Proccess stuck in __lock_page ...
    Con Kolivas wrote:
    > On Wed, 28 May 2003 23:08, Jens Axboe wrote:
    >
    >>On Wed, May 28 2003, Carl-Daniel Hailfinger wrote:
    >>
    >>>Jens Axboe wrote:
    >>>
    >>>>On Wed, May 28 2003, Marc-Christian Petersen wrote:
    >>>>
    >>>>>On Wednesday 28 May 2003 13:27, Andrew Morton wrote:
    >>>>>
    >>>>>>Guys, you're the ones who can reproduce this. Please spend more time
    >>>>>>working out which chunk (or combination thereof) actually fixes the
    >>>>>>problem. If indeed any of them do.
    >>>>>
    >>>>>As I said, I will test it this evening. ATM I don't have time to
    >>>>>recompile and reboot. This evening I will test extensively, even on
    >>>>>SMP, SCSI, IDE and so on.
    >>>>
    >>>>May I ask how you are reproducing the bad results? I'm trying in vain
    >>>>here...
    >>>
    >>>Quoting Con Kolivas:
    >>>
    >>>dd if=/dev/zero of=dump bs=4096 count=512000
    >>
    >>already tried that, no go. on ide/scsi? what filesystem? how much ram?
    >>anything else running? smp/up?
    >
    >
    > I'm using UP on IDE. I reproduce it easily on a P3 256Mb laptop with 5400rpm
    > drive, and less easily but still occurs on a P4 2.53 512Mb pc with 2x7200rpm
    > software raid 0 IDE drives. Even if the only thing you try to do is move the
    > mouse, the mouse will freeze for up to 30secs. When you first start the write
    > no disk activity happens for up to a few seconds, then it will start writing
    > madly and the machine will come to a standstill for a variable length of
    > time. Then it will come back to life for a few seconds only to die again for
    > a few seconds and so on till the write is complete.
    >
    > Still testing combinations to see which is the best, but 1+2 seems better than
    > 3 alone as doing reads midstream in the write don't cause hangs. I haven't
    > seen zombie processes ever.

    Just curious - which compiler did you use?


    Carl-Daniel

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