On Tue, May 30, 2006 at 09:52:24AM -0400, Dave Jones wrote:
> On Tue, May 30, 2006 at 03:50:59PM +0200, Jens Axboe wrote:
>
> > > > > > Pretty baffling... cfq has been hammered pretty thoroughly over the
> > > > > > last months and _nothing_ has shown up except some performance anomalies
> > > > > > that are now fixed. Since daves case (at least) seems to be
> > > > > > use-after-free, I'll see if I can reproduce with some contrived case.
> > > > > > I'm asuming that picasa forks and exits a lot with submitted io in
> > > > > > between than may not have finished at exit.
> > > > >
> > > > > The second time I hit it, was actually during boot up.
> > > >
> > > > Dave, do you have any io scheduler switching going on?
> > >
> > > Nope, everything set to use CFQ as default, and left that way.
> >
> > Hrmpf ok, I had hoped perhaps something in your init scripts modified
> > the scheduler value.
>
> grep doesn't show anything in init scripts, and ttbomk, hald isn't messing
> with this. (Actually I'm seeing it trigger before that gets started
> anyway, so that can't be it).
In case it makes a difference to help with reproducing -- the hardware of this
system is:
two sata drives sda1/sdb1 in single-volume device-mapper configuration as VolGroup00-LogVol00
pata cd drive on /dev/hdc
usb memory stick on sdc1
Nothing too out of the ordinary there..
Dave
--
http://www.codemonkey.org.uk
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