On Thu, Jun 21, 2018 at 04:22:22PM +0800, jianchao.wang wrote: > > Trace, please. With the latest kernel. I'm not saying that there > > is nothing to fix, but the mode of never completing once timeout > > requests as currently done is SCSI is clearly broken. > > > > I didn't find the existing method to simulate this. > So I modified the scsi-debug as following patch as install it as following: > modprobe scsi-debug delay=-1 ndelay=-1 > Both 4.17-rc1 and 4.18-rc1 with this patch set could survive from the test. What tree is this against? I can't apply it to either current Linus' tree or 4.17 for that matter. Also I'm not sure this blk_abort_request call is representative of the real world. Drivers do drain their queues before calling it in general, e.g. take a look at ata_eh_set_pending for the probably most common user.
