On Mon, 10 Nov 2014, Ming Lei wrote: > Date: Mon, 10 Nov 2014 20:18:32 +0800 > From: Ming Lei <tom.leiming@xxxxxxxxx> > To: Lukáš Czerner <lczerner@xxxxxxxxxx> > Cc: Jens Axboe <axboe@xxxxxxxxx>, > Linux Virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx>, > Christoph Hellwig <hch@xxxxxx> > Subject: Re: Re: kernel BUG at drivers/block/virtio_blk.c:172 > > On Mon, Nov 10, 2014 at 7:59 PM, Lukáš Czerner <lczerner@xxxxxxxxxx> wrote: > > > > Hi, > > > > so I encountered it again on 3.17.0-rc4. This output is from the > > run with your patch. > > > > I am using libvirt (virt-manager) to configure and run the virtual > > machine, but looking at the xml, I do not think it's passing > > 'scsi=off' at all. > > > > Btw, that xfs file system is a root file system. > > > > > > [ 3.667553] blk_recount_segments: 1-0-1 vcnt-0 segs-128 > > [ 3.668692] blk_recount_segments: 1-0-1 vcnt-0 segs-128 > > [ 3.669897] blk_recount_segments: 1-0-1 vcnt-0 segs-128 > > [ 3.671083] blk_recount_segments: 1-0-1 vcnt-0 segs-128 > > Hamm, I should have used bi_phys_segments to decide if > merge is needed, and attached patch should fix the problem. Thanks for the patch, unfortunately it does not fix the issue for me. I am willing to try something else though :) -Lukas > > > Thanks, > Ming Lei >
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