Messages in this thread |  | | Date | Tue, 17 Jan 2012 17:07:15 -0500 | | From | Vivek Goyal <> | | Subject | Re: Kernel crash in icq_free_icq_rcu |
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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.
Thanks Vivek
> > diff --git a/block/elevator.c b/block/elevator.c > index 91e18f8..b5a94ed 100644 > --- a/block/elevator.c > +++ b/block/elevator.c > @@ -105,6 +105,7 @@ int elv_rq_merge_ok(struct request *rq, struct bio *bio) > if (bio_integrity(bio) != blk_integrity_rq(rq)) > return 0; > > + return 0; > if (!elv_iosched_allow_merge(rq, bio)) > return 0; >
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