Messages in this thread | | | Date | Wed, 18 Jan 2012 09:01:00 +0800 | Subject | Re: Kernel crash in icq_free_icq_rcu | From | Shaohua Li <> |
| |
2012/1/18 Vivek Goyal <vgoyal@redhat.com>: > On Tue, Jan 17, 2012 at 01:48:34PM -0800, Tejun Heo wrote: >> On Tue, Jan 17, 2012 at 03:18:23PM -0500, Vivek Goyal wrote: >> > Hi Tejun, >> > >> > With latest linus kernel, I see following crash. I was running some >> > scripts which create cgroups and launch fio jobs in those groups. In >> > a separate window I wrote a script to change the IO scheduler on the >> > device in a loop while IO was happening on the device. After few >> > seconds I see following. So far I tried it twice and reproduced it >> > both the times in first few seconds. >> >> Does the following patch make any difference? > > Nope. Still can reproduce the issue. I had similar issue too. Looks ioc_create_icq finds an icq (in ioc_lookup_icq) the icq is in rcu free (it has __rcu_icq_cache set)
| |