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RDS: use delayed work for the FMR flushes 

Using a delayed work queue helps us make sure a healthy number of FMRs
have queued up over the limit.  It makes for a large improvement in RDMA
iops.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2010-06-11 11:26:02 -07:00 committed by Andy Grover
parent eabb732279
commit 7a0ff5dbdd
1 changed files with 6 additions and 6 deletions
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12
net/rds/ib_rdma.c
View File

@ -66,7 +66,7 @@ struct rds_ib_mr {
*/
struct rds_ib_mr_pool {
struct mutex flush_lock; /* serialize fmr invalidate */
struct work_struct flush_worker; /* flush worker */
struct delayed_work flush_worker; /* flush worker */
atomic_t item_count; /* total # of MRs */
atomic_t dirty_count; /* # dirty of MRs */
@ -226,7 +226,7 @@ struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_ibdev)
INIT_XLIST_HEAD(&pool->clean_list);
mutex_init(&pool->flush_lock);
init_waitqueue_head(&pool->flush_wait);
INIT_WORK(&pool->flush_worker, rds_ib_mr_pool_flush_worker);
INIT_DELAYED_WORK(&pool->flush_worker, rds_ib_mr_pool_flush_worker);
pool->fmr_attr.max_pages = fmr_message_size;
pool->fmr_attr.max_maps = rds_ibdev->fmr_max_remaps;
@ -254,7 +254,7 @@ void rds_ib_get_mr_info(struct rds_ib_device *rds_ibdev, struct rds_info_rdma_co
void rds_ib_destroy_mr_pool(struct rds_ib_mr_pool *pool)
{
cancel_work_sync(&pool->flush_worker);
cancel_delayed_work_sync(&pool->flush_worker);
rds_ib_flush_mr_pool(pool, 1, NULL);
WARN_ON(atomic_read(&pool->item_count));
WARN_ON(atomic_read(&pool->free_pinned));
@ -695,7 +695,7 @@ out_nolock:
static void rds_ib_mr_pool_flush_worker(struct work_struct *work)
{
struct rds_ib_mr_pool *pool = container_of(work, struct rds_ib_mr_pool, flush_worker);
struct rds_ib_mr_pool *pool = container_of(work, struct rds_ib_mr_pool, flush_worker.work);
rds_ib_flush_mr_pool(pool, 0, NULL);
}
@ -720,7 +720,7 @@ void rds_ib_free_mr(void *trans_private, int invalidate)
/* If we've pinned too many pages, request a flush */
if (atomic_read(&pool->free_pinned) >= pool->max_free_pinned ||
atomic_read(&pool->dirty_count) >= pool->max_items / 10)
queue_work(rds_wq, &pool->flush_worker);
queue_delayed_work(rds_wq, &pool->flush_worker, 10);
if (invalidate) {
if (likely(!in_interrupt())) {
@ -728,7 +728,7 @@ void rds_ib_free_mr(void *trans_private, int invalidate)
} else {
/* We get here if the user created a MR marked
* as use_once and invalidate at the same time. */
queue_work(rds_wq, &pool->flush_worker);
queue_delayed_work(rds_wq, &pool->flush_worker, 10);
}
}