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RDMA/mlx5: Delay emptying a cache entry when a new MR is added to it recently

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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: b9358bdbc7 ("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 <aharonl@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Aharon Landau 2021-07-27 10:16:06 +03:00 committed by Jason Gunthorpe
parent c500bee1c5
commit d6793ca97b
1 changed files with 2 additions and 2 deletions
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4
drivers/infiniband/hw/mlx5/mr.c
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@ -531,8 +531,8 @@ 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;