On Wed, Jun 13, 2007 at 12:16:36PM +0100, David Greaves wrote: > Linus Torvalds wrote: > > > >On Fri, 8 Jun 2007, David Greaves wrote: > >>positive: I can now get sysrq-t :) > > > >Ok, so color me confused, > So what do you think that makes me <grin> > > >and maybe I have missed some of the emails or > >skimmed over them too fast (there's been too many of them ;), > > You may have missed these 'tests' with rc4+Tejun's fix: > * clean boot, unmounting the xfs fs : normal hibernate/resume > * clean boot, remount ro xfs fs : normal hibernate/resume > * clean boot, touch; sync; echo 1 > /proc/sys/vm/drop_caches: normal > hibernate/resume > * clean boot, touch; sync; echo 2 > /proc/sys/vm/drop_caches: hang > hibernating > * clean boot, touch; sync; echo 3 > /proc/sys/vm/drop_caches: hang > hibernating > > Dave asked me to do them but hasn't responded yet. Sorry 'bout that. Bit busy ATM. What I was effectively looking for was whether it was data or metadata that was causing the problems. From the above, it would appear that dropping the page cache (echo 1 > drop caches) allows a successful hibernate/resume. Next step would have been to isolate which cache being dropped made the difference (e.g. a file or a bdev cache?). However, it is clear from the back traces that there is something unwell with md/sata code, so I don't think this needs to be tracked any further from the filesystem perspective. Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
