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| author | Wengang Wang <wen.gang.wang@oracle.com> | 2015-08-25 12:02:00 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-08-25 16:28:11 -0700 |
| commit | 6116c2030fff91950f68b7fffb5959c91a05aaf6 (patch) | |
| tree | c569c731786a9b9e2cfe6f37fe12e52212ab1055 /net/rds/ib_rdma.c | |
| parent | 3f6b3143031b678a8577df1f24ca977510aefcf5 (diff) | |
| download | lwn-6116c2030fff91950f68b7fffb5959c91a05aaf6.tar.gz lwn-6116c2030fff91950f68b7fffb5959c91a05aaf6.zip | |
RDS: fix fmr pool dirty_count
In rds_ib_flush_mr_pool(), dirty_count accounts the clean ones
which is wrong. This can lead to a negative dirty count value.
Lets fix it.
Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/ib_rdma.c')
| -rw-r--r-- | net/rds/ib_rdma.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c index 7b7aac8cdb56..a275b7d205ef 100644 --- a/net/rds/ib_rdma.c +++ b/net/rds/ib_rdma.c @@ -528,11 +528,13 @@ static inline unsigned int rds_ib_flush_goal(struct rds_ib_mr_pool *pool, int fr /* * given an llist of mrs, put them all into the list_head for more processing */ -static void llist_append_to_list(struct llist_head *llist, struct list_head *list) +static unsigned int llist_append_to_list(struct llist_head *llist, + struct list_head *list) { struct rds_ib_mr *ibmr; struct llist_node *node; struct llist_node *next; + unsigned int count = 0; node = llist_del_all(llist); while (node) { @@ -540,7 +542,9 @@ static void llist_append_to_list(struct llist_head *llist, struct list_head *lis ibmr = llist_entry(node, struct rds_ib_mr, llnode); list_add_tail(&ibmr->unmap_list, list); node = next; + count++; } + return count; } /* @@ -581,7 +585,7 @@ static int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *pool, LIST_HEAD(unmap_list); LIST_HEAD(fmr_list); unsigned long unpinned = 0; - unsigned int nfreed = 0, ncleaned = 0, free_goal; + unsigned int nfreed = 0, dirty_to_clean = 0, free_goal; int ret = 0; rds_ib_stats_inc(s_ib_rdma_mr_pool_flush); @@ -623,8 +627,8 @@ static int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *pool, /* Get the list of all MRs to be dropped. Ordering matters - * we want to put drop_list ahead of free_list. */ - llist_append_to_list(&pool->drop_list, &unmap_list); - llist_append_to_list(&pool->free_list, &unmap_list); + dirty_to_clean = llist_append_to_list(&pool->drop_list, &unmap_list); + dirty_to_clean += llist_append_to_list(&pool->free_list, &unmap_list); if (free_all) llist_append_to_list(&pool->clean_list, &unmap_list); @@ -652,7 +656,6 @@ static int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *pool, kfree(ibmr); nfreed++; } - ncleaned++; } if (!list_empty(&unmap_list)) { @@ -678,7 +681,7 @@ static int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *pool, } atomic_sub(unpinned, &pool->free_pinned); - atomic_sub(ncleaned, &pool->dirty_count); + atomic_sub(dirty_to_clean, &pool->dirty_count); atomic_sub(nfreed, &pool->item_count); out: |