On 4/5/19 5:43 AM, Laurence Oberman wrote:
On Fri, 2019-04-05 at 08:06 +0200, Christoph Hellwig wrote:
On Thu, Apr 04, 2019 at 10:08:43AM -0700, Bart Van Assche wrote:
blk_mq_try_issue_directly() can return BLK_STS*_RESOURCE for
requests that
have been queued. If that happens when blk_mq_try_issue_directly()
is called
by the dm-mpath driver then dm-mpath will try to resubmit a request
that is
already queued and a kernel crash follows. Since it is nontrivial
to fix
blk_mq_request_issue_directly(), revert the
blk_mq_request_issue_directly()
changes that went into kernel v5.0.
And what are we going to do about 5.1+?
All the testing of the reverts etc. was agains 5.1-rc3.
I believe the intention is to revert for 5.1x+ and earlier.
I think the revert should happen for the v5.0 and v5.1 kernels, hence
the "Cc: stable" tag.
Bart.
