Messages in this thread | | | Date | Fri, 15 Dec 2006 15:35:00 -0600 | From | Michal Sabala <> | Subject | Re: 2.6.18 mmap hangs unrelated apps |
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On 2006/12/15 at 14:42:08 Andrew Morton <akpm@osdl.org> wrote > On Fri, 15 Dec 2006 11:50:30 -0600 > Michal Sabala <lkml@saahbs.net> wrote: > > > On 2006/12/15 at 10:24:15 Trond Myklebust <trond.myklebust@fys.uio.no> wrote > > > On Thu, 2006-12-14 at 20:30 -0600, Michal Sabala wrote: > > > > > > > > `cat /proc/*PID*/wchan` for all hanging processes contains page_sync. > > > > > > Have you tried an 'echo t >/proc/sysrq-trigger' on a client with one of > > > these hanging processes? If so, what does the output look like? > > > > Hello Trond, > > > > Below is the sysrq trace output for XFree86 which entered the > > uninterruptible sleep state on the P4 machine with nfs /home. Please > > note that XFree86 does not have any files open in /home - as reported by > > `lsof`. Below, I also listed the output of vmstat. > > We'd need to see the trace of all D-state processes, please. Xfree86 might > just be a victim of a deadlock elsewhere. However there is a problem here..
Hi Andrew,
In most cases only a single process enters the D-state, this time it was XFree, but I've seen gimp, firefox, gconfd and bash. Once or twice I did see two or three processes ending up in uninterruptible sleep, but I suspect they entered this state at different test-mmap.c runs (I left test-mmap.c running in a bash loop and checked the system after a few hours).
Would it be beneficial to keep running test-mmap.c on this machine until two or more processes end up in D-state? I can leave this machine running test-mmap.c over the weekend.
Please advise,
Sincerely,
Michal
-- Michal "Saahbs" Sabala - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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