From: Milan Broz <[email protected]>
Use a separate single-threaded workqueue for each crypt device
instead of one global workqueue.
Signed-off-by: Milan Broz <[email protected]>
Signed-off-by: Alasdair G Kergon <[email protected]>
---
drivers/md/dm-crypt.c | 32 ++++++++++++++------------------
1 files changed, 14 insertions(+), 18 deletions(-)
Index: linux-2.6.23/drivers/md/dm-crypt.c
===================================================================
--- linux-2.6.23.orig/drivers/md/dm-crypt.c 2007-10-12 13:15:31.000000000 +0100
+++ linux-2.6.23/drivers/md/dm-crypt.c 2007-10-12 13:18:16.000000000 +0100
@@ -80,6 +80,7 @@ struct crypt_config {
mempool_t *page_pool;
struct bio_set *bs;
+ struct workqueue_struct *queue;
/*
* crypto related data
*/
@@ -501,13 +502,14 @@ static void dec_pending(struct dm_crypt_
* Needed because it would be very unwise to do decryption in an
* interrupt context.
*/
-static struct workqueue_struct *_kcryptd_workqueue;
static void kcryptd_do_work(struct work_struct *work);
static void kcryptd_queue_io(struct dm_crypt_io *io)
{
+ struct crypt_config *cc = io->target->private;
+
INIT_WORK(&io->work, kcryptd_do_work);
- queue_work(_kcryptd_workqueue, &io->work);
+ queue_work(cc->queue, &io->work);
}
static void crypt_endio(struct bio *clone, int error)
@@ -889,9 +891,17 @@ static int crypt_ctr(struct dm_target *t
} else
cc->iv_mode = NULL;
+ cc->queue = create_singlethread_workqueue("kcryptd");
+ if (!cc->queue) {
+ ti->error = "Couldn't create kcryptd queue";
+ goto bad_queue;
+ }
+
ti->private = cc;
return 0;
+bad_queue:
+ kfree(cc->iv_mode);
bad_iv_mode:
dm_put_device(ti, cc->dev);
bad5:
@@ -916,7 +926,7 @@ static void crypt_dtr(struct dm_target *
{
struct crypt_config *cc = (struct crypt_config *) ti->private;
- flush_workqueue(_kcryptd_workqueue);
+ destroy_workqueue(cc->queue);
bioset_free(cc->bs);
mempool_destroy(cc->page_pool);
@@ -1061,25 +1071,12 @@ static int __init dm_crypt_init(void)
if (!_crypt_io_pool)
return -ENOMEM;
- _kcryptd_workqueue = create_workqueue("kcryptd");
- if (!_kcryptd_workqueue) {
- r = -ENOMEM;
- DMERR("couldn't create kcryptd");
- goto bad1;
- }
-
r = dm_register_target(&crypt_target);
if (r < 0) {
DMERR("register failed %d", r);
- goto bad2;
+ kmem_cache_destroy(_crypt_io_pool);
}
- return 0;
-
-bad2:
- destroy_workqueue(_kcryptd_workqueue);
-bad1:
- kmem_cache_destroy(_crypt_io_pool);
return r;
}
@@ -1090,7 +1087,6 @@ static void __exit dm_crypt_exit(void)
if (r < 0)
DMERR("unregister failed %d", r);
- destroy_workqueue(_kcryptd_workqueue);
kmem_cache_destroy(_crypt_io_pool);
}
-
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