Hello, On Fri, Apr 29, 2011 at 01:56:46AM +0200, Thilo-Alexander Ginkel wrote: > On Thu, Apr 28, 2011 at 12:30, Tejun Heo <tj@xxxxxxxxxx> wrote: > > Does your kernel have preemption enabled? > > CONFIG_PREEMPT is not set > > > If not, does the following patch fix the problem? > > Yep, looks good so far (at least in my virtualized test environment): > 2.6.39-rc4 with your patch applied survived 100 suspend/resume cycles > w/o locking up. Awesome, I'll forward the patch to mainline and -stable. > Just out of curiosity: Was this a new issue in 2.6.39-rc4 ord could > this fix be backported to 2.6.38? This needs to be backported. It's an issue which has been there from the initial implementation of cmwq. It needs non-preemptive kernel and rescuer kicking in at a very bad timing, so not many people seem to have been affected by this. Your setup somehow triggers it reliably. Thank you. -- tejun -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
