Messages in this thread | | | Subject | Re: bio linked list corruption. | From | Jens Axboe <> | Date | Wed, 26 Oct 2016 17:21:22 -0600 |
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On 10/26/2016 05:19 PM, Chris Mason wrote: > On Wed, Oct 26, 2016 at 05:03:45PM -0600, Jens Axboe wrote: >> On 10/26/2016 04:58 PM, Linus Torvalds wrote: >>> On Wed, Oct 26, 2016 at 3:51 PM, Linus Torvalds >>> <torvalds@linux-foundation.org> wrote: >>>> >>>> Dave: it might be a good idea to split that "WARN_ON_ONCE()" in >>>> blk_mq_merge_queue_io() into two >>> >>> I did that myself too, since Dave sees this during boot. >>> >>> But I'm not getting the warning ;( >>> >>> Dave gets it with ext4, and thats' what I have too, so I'm not sure >>> what the required trigger would be. >> >> Actually, I think I see what might trigger it. You are on nvme, iirc, >> and that has a deep queue. Dave, are you testing on a sata drive or >> something similar with a shallower queue depth? If we end up sleeping >> for a request, I think we could trigger data->ctx being different. >> >> Dave, can you hit the warnings with this? Totally untested... > > Confirmed, totally untested ;) Don't try this one at home folks > (working this out with Jens offlist)
Ahem, I did say untested! The one I just sent in reply to Linus should be better. Though that one is completely untested as well...
-- Jens Axboe
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