From 9934a8bea2fc67e6f07d74304eca2a91d251bfe8 Mon Sep 17 00:00:00 2001 From: Milan Broz Date: Fri, 19 Oct 2007 22:38:57 +0100 Subject: [PATCH] dm crypt: use per device singlethread workqueues Use a separate single-threaded workqueue for each crypt device instead of one global workqueue. Signed-off-by: Milan Broz Signed-off-by: Alasdair G Kergon --- drivers/md/dm-crypt.c | 32 ++++++++++++++------------------ 1 file changed, 14 insertions(+), 18 deletions(-) diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 3fa3b24947da..126ed21e6b17 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -80,6 +80,7 @@ struct crypt_config { mempool_t *page_pool; struct bio_set *bs; + struct workqueue_struct *queue; /* * crypto related data */ @@ -480,13 +481,14 @@ static void dec_pending(struct dm_crypt_io *io, int error) * 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) @@ -868,9 +870,17 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv) } 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: @@ -895,7 +905,7 @@ static void crypt_dtr(struct dm_target *ti) { 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); @@ -1040,25 +1050,12 @@ 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; } @@ -1069,7 +1066,6 @@ 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); } -- 2.20.1