On Tue, Nov 26 2019 at 5:41am -0500, gregkh@linuxfoundation.org gregkh@linuxfoundation.org wrote:

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

I assume you didn't first pull in the prereq commit detailed in the commit header with: Requires: ed0302e83098d ("dm crypt: make workqueue names device-specific")

?

Because this worked for me: git cherry-pick ed0302e83098d git cherry-pick f612b2132db529feac4f965f28a1b9258ea7c22b

------------------ original commit in Linus's tree ------------------

From f612b2132db529feac4f965f28a1b9258ea7c22b Mon Sep 17 00:00:00 2001 From: Mike Snitzer snitzer@redhat.com Date: Wed, 20 Nov 2019 17:27:39 -0500 Subject: [PATCH] Revert "dm crypt: use WQ_HIGHPRI for the IO and crypt workqueues"

This reverts commit a1b89132dc4f61071bdeaab92ea958e0953380a1.

Revert required hand-patching due to subsequent changes that were applied since commit a1b89132dc4f61071bdeaab92ea958e0953380a1.

Requires: ed0302e83098d ("dm crypt: make workqueue names device-specific") Cc: stable@vger.kernel.org Bug: https://bugzilla.kernel.org/show_bug.cgi?id=199857 Reported-by: Vito Caputo vcaputo@pengaru.com Signed-off-by: Mike Snitzer snitzer@redhat.com

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index f87f6495652f..eb9782fc93fe 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -2700,21 +2700,18 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv) } ret = -ENOMEM;

• cc->io_queue = alloc_workqueue("kcryptd_io/%s",

• 		       WQ_HIGHPRI | WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM,
  

• 		       1, devname);
  

• cc->io_queue = alloc_workqueue("kcryptd_io/%s", WQ_MEM_RECLAIM, 1, devname); if (!cc->io_queue) { ti->error = "Couldn't create kcryptd io queue"; goto bad; }

if (test_bit(DM_CRYPT_SAME_CPU, &cc->flags))

• cc->crypt_queue = alloc_workqueue("kcryptd/%s",
  

• 				  WQ_HIGHPRI | WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM,
  

• cc->crypt_queue = alloc_workqueue("kcryptd/%s", WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM,
  			  1, devname);
  

  else cc->crypt_queue = alloc_workqueue("kcryptd/%s",

• 				  WQ_HIGHPRI | WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM | WQ_UNBOUND,
  

• 				  WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM | WQ_UNBOUND,
  			  num_online_cpus(), devname);
  

  if (!cc->crypt_queue) { ti->error = "Couldn't create kcryptd queue";