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authorTejun Heo <tj@kernel.org>2011-01-13 19:59:58 +0000
committerAlasdair G Kergon <agk@redhat.com>2011-01-13 19:59:58 +0000
commit9c4376de98719d2768dd919553843de34bb094a6 (patch)
treec20b10e9018bb51803c535a38a04ee8b12b6d98a /drivers/md/dm.c
parent4d4d66ab5322fa9b0f51842a76139387a40e1ce9 (diff)
dm: use non reentrant workqueues if equivalent
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>
Diffstat (limited to 'drivers/md/dm.c')
-rw-r--r--drivers/md/dm.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 39aaa9290128..e504bb40d60e 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1883,7 +1883,8 @@ static struct mapped_device *alloc_dev(int minor)
add_disk(md->disk);
format_dev_t(md->name, MKDEV(_major, minor));
- md->wq = alloc_ordered_workqueue("kdmflush", WQ_MEM_RECLAIM);
+ md->wq = alloc_workqueue("kdmflush",
+ WQ_NON_REENTRANT | WQ_MEM_RECLAIM, 0);
if (!md->wq)
goto bad_thread;