On Wed, Dec 20, 2017 at 11:41:02PM +0000, Bart Van Assche wrote:

On Tue, 2017-12-12 at 11:01 -0800, Tejun Heo wrote:

quoted

Currently, blk-mq timeout path synchronizes against the usual
issue/completion path using a complex scheme involving atomic
bitflags, REQ_ATOM_*, memory barriers and subtle memory coherence
rules.  Unfortunatley, it contains quite a few holes.

Hello Tejun,

An attempt to run SCSI I/O with this patch series applied resulted in
the following:

Can you please try the v3?  There were a couple bugs that I missed
while testing earlier versions.

 http://lkml.kernel.org/r/20171216120726.517153-1-tj@kernel.org

Thanks.

-- 
tejun