From: Aharon Landau Date: Tue, 27 Jul 2021 07:16:06 +0000 (+0300) Subject: RDMA/mlx5: Delay emptying a cache entry when a new MR is added to it recently X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=e74551ba938aef92cb9b476339edb4604858a7f8;p=linux-block.git RDMA/mlx5: Delay emptying a cache entry when a new MR is added to it recently [ Upstream commit d6793ca97b76642b77629dd0783ec64782a50bdb ] Fixing a typo that causes a cache entry to shrink immediately after adding to it new MRs if the entry size exceeds the high limit. In doing so, the cache misses its purpose to prevent the creation of new mkeys on the runtime by using the cached ones. Fixes: b9358bdbc713 ("RDMA/mlx5: Fix locking in MR cache work queue") Link: https://lore.kernel.org/r/fcb546986be346684a016f5ca23a0567399145fa.1627370131.git.leonro@nvidia.com Signed-off-by: Aharon Landau Reviewed-by: Maor Gottlieb Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c index 971694e781b6..19346693c1da 100644 --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -526,8 +526,8 @@ static void __cache_work_func(struct mlx5_cache_ent *ent) */ spin_unlock_irq(&ent->lock); need_delay = need_resched() || someone_adding(cache) || - time_after(jiffies, - READ_ONCE(cache->last_add) + 300 * HZ); + !time_after(jiffies, + READ_ONCE(cache->last_add) + 300 * HZ); spin_lock_irq(&ent->lock); if (ent->disabled) goto out;