On Thu, 2018-06-21 at 10:19 +0200, Christoph Hellwig wrote: > On Thu, Jun 21, 2018 at 09:43:26AM +0800, jianchao.wang wrote: > > So we have to preserve the ability of block layer that it could prevent > > IO completion path from entering a timeout request. > > > > With scsi-debug module, I tried to simulate a scenario where timeout and IO > > completion path could occur concurrently, the system ran into crash easily. > > 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. That's not how the SCSI core works. Bart.
