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dm: use non reentrant workqueues if equivalent

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kmirrord_wq, kcopyd_work and md->wq are created per dm instance and
serve only a single work item from the dm instance, so non-reentrant
workqueues would provide the same ordering guarantees as ordered ones
while allowing CPU affinity and use of the workqueues for other
purposes.  Switch them to non-reentrant workqueues.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Tejun Heo
2011-01-13 19:59:58 +00:00
committed by Alasdair G Kergon
parent 4d4d66ab53
commit 9c4376de98
4 changed files with 9 additions and 6 deletions
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4
include/linux/dm-ioctl.h
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@ -268,8 +268,8 @@ enum {
#define DM_VERSION_MAJOR 4
#define DM_VERSION_MINOR 19
#define DM_VERSION_PATCHLEVEL 0
#define DM_VERSION_EXTRA "-ioctl (2010-10-14)"
#define DM_VERSION_PATCHLEVEL 1
#define DM_VERSION_EXTRA "-ioctl (2011-01-07)"
/* Status bits */
#define DM_READONLY_FLAG (1 << 0) /* In/Out */