Messages in this thread | | | Date | Mon, 21 Jul 2003 16:40:27 -0300 (BRT) | From | Marcelo Tosatti <> | Subject | Re: Bug Report: 2.4.22-pre5: BUG in page_alloc (fwd) |
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On Mon, 21 Jul 2003, Stephan von Krawczynski wrote:
> On Mon, 21 Jul 2003 12:20:33 -0400 > Andrea Arcangeli <andrea@suse.de> wrote: > > > > I managed to freeze the pre7 box within these few hours. There was no nfs > > > involved, only tar-to-tape. > > > I switched back to 2.4.21 to see if it is still stable. > > > Is there a possibility that the i/o-scheduler has another flaw somewhere > > > (just like during mount previously) ... > > > > is it a scsi tape? > > yes. > > > Is the tape always involved? > > No, I experience both freeze during nfs-only action and freeze during > tar-to-scsi-tape. > My feelings are that the freeze does (at least in the nfs case) not happen > during high load but rather when load seems relatively light. Handwaving one > could say it looks rather like an I/O sched starvation issue than breakdown > during high load. Similar to the last issue. > > > there are st.c updates > > between 2.4.21 to 22pre7. you can try to back them out. > > Hm, which? > > > [...] > > You should also provide a SYSRQ+P/T of the hang or we can't debug it at > > all. > > Well, I really tried hard to produce something, but failed so far, if I had > more time I would try a serial console hoping that it survives long enough to > show at least _something_. > The only thing I ever could see was the BUG in page-alloc thing from the > beginning of this thread.
Stephan,
I'm sending you the scsi tape driver changes in 2.4.22-pre so you can revert them (in private in a few minutes).
If that doesnt make us spot the problem, can you PLEASE find out in which -pre the problem starts ?
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