Re: 2.4.20: Proccess stuck in __lock_page ...

[manish <manish@storadinc.com>]

Marcelo Tosatti wrote:

>On Tue, 27 May 2003, Marc-Christian Petersen wrote:
>
>>On Tuesday 27 May 2003 19:27, Marcelo Tosatti wrote:
>>
>>Hi Marcelo,
>>
>>>>Following is SysRq-T output for stuck processes during such a pause from
>>>>Christian Klose. Only processes in D state are listed for brevity.
>>>>Especially the last two call traces are interesting.
>>>>
>>>A "pause" is perfectly fine (to some extent, of course), now a hang is
>>>not. Is this backtrace from a hanged, unusable kernel or ?
>>>
>>A pause is _not_ perfectly fine, even not to some extent. That pause we are
>>discussing about is a pause of the _whole_ machine, not just disk i/o pauses.
>>Mouse stops, keyboard stops, everything stops, who knows wtf.
>>
>
>Do you also notice them?
>
>
>>That behaviour is absolutely bullshit for desktop users. For serverusage you
>>may not notice it in this dimension (mostly no X so no mouse), but also for a
>>server environment this may be very bad.
>>
>
>Agreed.
>
Hi Marc,

With respect to the hangs that you noticed, did the processes complete 
after a "pause" or did they stay hung (deadlocked)?

Thanks
Manish