On Tue, Nov 11, 2014 at 7:31 AM, Jens Axboe <axboe@xxxxxxxxx> wrote: > On 2014-11-10 02:59, Rusty Russell wrote: >> >> Jeff Layton <jlayton@xxxxxxxxxxxxxxx> writes: >> >>> In the latest Fedora rawhide kernel in the repos, I'm seeing the >>> following oops when mounting xfs. rc2-ish kernels seem to be fine: >>> >>> [ 64.669633] ------------[ cut here ]------------ >>> [ 64.670008] kernel BUG at drivers/block/virtio_blk.c:172! >> >> >> Hmm, that's: >> >> BUG_ON(req->nr_phys_segments + 2 > vblk->sg_elems); >> >> But during our probe routine we said: >> >> /* We can handle whatever the host told us to handle. */ >> blk_queue_max_segments(q, vblk->sg_elems-2); >> >> Jens? > > > Known, I'm afraid, Ming is looking into it. There is one obvious bug which should have been fixed by below patch(0001-block-blk-merge-fix-blk_recount_segments.patch"): http://marc.info/?l=linux-virtualization&m=141562191719405&q=p3 And there might be another one, I appreciate someone can post log which is printed by patch("blk-seg.patch") in below link if the bug still can be triggered even with above fix: http://marc.info/?l=linux-virtualization&m=141473040618467&q=p3 Thanks, -- Ming Lei _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
