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| author | Tejun Heo <tj@kernel.org> | 2011-01-13 19:59:58 +0000 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2011-01-13 19:59:58 +0000 |
| commit | 9c4376de98719d2768dd919553843de34bb094a6 (patch) | |
| tree | c20b10e9018bb51803c535a38a04ee8b12b6d98a /drivers/md/dm.c | |
| parent | 4d4d66ab5322fa9b0f51842a76139387a40e1ce9 (diff) | |
| download | linux-9c4376de98719d2768dd919553843de34bb094a6.tar.gz linux-9c4376de98719d2768dd919553843de34bb094a6.tar.bz2 linux-9c4376de98719d2768dd919553843de34bb094a6.zip | |
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.c | 3 |
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; |