On Fri, 15 Dec 2006 15:35:00 -0600
Michal Sabala <[email protected]> wrote:
> On 2006/12/15 at 14:42:08 Andrew Morton <[email protected]> wrote
> > On Fri, 15 Dec 2006 11:50:30 -0600
> > Michal Sabala <[email protected]> wrote:
> >
> > > On 2006/12/15 at 10:24:15 Trond Myklebust <[email protected]> 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).
OK, useful info, thanks.
> 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.
No, that's OK. The next step should be for a kernel wrangler to get in
there with your testcase. It could well be that lock_page-inside-lock_page
thing.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
