Messages in this thread | | | Date | Tue, 3 Jan 2012 10:37:41 -0800 | From | Tejun Heo <> | Subject | Re: block: WARN_ON_ONCE(ev->block <= 0) triggered in __disk_unblock_events() |
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Hello,
On Sun, Jan 01, 2012 at 05:22:58PM +0000, Bart Van Assche wrote: > In a workload that involves a lot of scsi_remove_hosts() calls (srp-ha > patch set stress test) I get the call stack below after about 30 to 50 > iterations. Is this a known issue ? Does this indicate a race > condition in the block layer ? I can trigger this issue not only with > 3.2-rc7 but also with 3.1.6. I haven't tried any other kernel versions > yet. > > ------------[ cut here ]------------ > WARNING: at block/genhd.c:1466 __disk_unblock_events+0xf5/0x110()
It's indicating that there were more disk_unblock_events() than disk_block_events(). Hmmm... weird. I'll prep a debug patch.
Thanks.
-- tejun
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