[PATCH] Fix for hang of Ordered task in TCM
Nicholas A. Bellinger
nab at linux-iscsi.org
Mon May 23 22:47:34 PDT 2016
On Mon, 2016-05-23 at 19:17 -0400, Bryant G Ly wrote:
> Quoting "Nicholas A. Bellinger" <nab at linux-iscsi.org>:
> > So AFAICT for delayed commands, the above patch ends up skipping these
> > three checks subsequently when doing __target_execute_cmd() directly
> > from target_restart_delayed_cmds(), no..?
> > After pondering this some more, what about moving these checks into
> > __target_execute_cmd() to handle both target_core_transport.c cases
> > instead..?
> > We'll also need a parameter for internal COMPARE_AND_WRITE usage
> > within compare_and_write_callback(), to bypass checks upon secondary
> > ->execute_cmd() WRITE payload submission after READ + COMPARE has
> > completed successfully.
> Looks good to me.
Thanks for the review!
> Nick just to let you know I've been working with
> Mike on VSCSI Target Fabric and we need this patch in kernel 4.4 do
> you know of the process in getting that there?
So pending a bit more list feedback + testing across multiple fabric
drivers, it's been added for the moment to target-pending/queue as post
As it merged into target-pending/master next week, the extra stable CC'
can be added to be picked up for linux-4.4.y stable and friends.
Also AFAIK, we've not had reports of other SCSI host environments
triggering this bug, but it's still a good idea to consider it for
linux-3.x.y backport at some point as well.
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