Re: 2.4.20: Proccess stuck in __lock_page ...

Carl-Daniel Hailfinger
2003-05-28T13:18:04Z

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