[PATCH 22/29] xfs: comment page allocation for nowait case in xfs_buf_find_insert()

[Hao Xu]

From: Hao Xu <howeyxu at tencent.com>

Add comments for page allocation in nowait case in xfs_buf_find_insert()

Signed-off-by: Hao Xu <howeyxu at tencent.com>
---
 fs/xfs/xfs_buf.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index eb3cd7702545..57bdc4c5dde1 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -633,6 +633,8 @@ xfs_buf_find_insert(
 	 * allocate the memory from the heap to minimise memory usage. If we
 	 * can't get heap memory for these small buffers, we fall back to using
 	 * the page allocator.
+	 * xfs_buf_alloc_kmem may return -EAGAIN, let's not return it but turn
+	 * to page allocator as well.
 	 */
 	if (BBTOB(new_bp->b_length) >= PAGE_SIZE ||
 	    xfs_buf_alloc_kmem(new_bp, flags) < 0) {
-- 
2.25.1