From 8576f374ac9537674e3cccb0a9d43fa2b7ebbf5b Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Mon, 19 Jul 2010 17:06:46 -0700 Subject: RDS: flush fmrs before allocating new ones Flushing FMRs is somewhat expensive, and is currently kicked off when the interrupt handler notices that we are getting low. The result of this is that FMR flushing only happens from the interrupt cpus. This spreads the load more effectively by triggering flushes just before we allocate a new FMR. Signed-off-by: Chris Mason --- net/rds/ib_rdma.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'net') diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c index 3efdddc39d49..0017964f2fcf 100644 --- a/net/rds/ib_rdma.c +++ b/net/rds/ib_rdma.c @@ -38,6 +38,8 @@ #include "ib.h" #include "xlist.h" +struct workqueue_struct *rds_ib_fmr_wq; + static DEFINE_PER_CPU(unsigned long, clean_list_grace); #define CLEAN_LIST_BUSY_BIT 0 @@ -304,6 +306,9 @@ static struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *rds_ibdev) struct rds_ib_mr *ibmr = NULL; int err = 0, iter = 0; + if (atomic_read(&pool->dirty_count) >= pool->max_items / 10) + queue_delayed_work(rds_ib_fmr_wq, &pool->flush_worker, 10); + while (1) { ibmr = rds_ib_reuse_fmr(pool); if (ibmr) @@ -691,8 +696,6 @@ out_nolock: return ret; } -struct workqueue_struct *rds_ib_fmr_wq; - int rds_ib_fmr_init(void) { rds_ib_fmr_wq = create_workqueue("rds_fmr_flushd"); -- cgit v1.2.1