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>
diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c
index 7b7aac8..a275b7d 100644
--- a/net/rds/ib_rdma.c
+++ b/net/rds/ib_rdma.c
@@ -528,11 +528,13 @@
/*
* 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 @@
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 @@
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 @@
/* 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 @@
kfree(ibmr);
nfreed++;
}
- ncleaned++;
}
if (!list_empty(&unmap_list)) {
@@ -678,7 +681,7 @@
}
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: