Btrfs: allow shrink_delalloc flush the needed reclaimed pages

[firefly-linux-kernel-4.4.55.git] / fs / btrfs / extent-tree.c

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 96cbc5104959d7e49974780b30d9aa2b22b66bca..424ae82855c8d328f5af660afd9fb3e4ebd7e6a8 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3343,7 +3343,7 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans,
        u64 max_reclaim;
        u64 reclaimed = 0;
        long time_left;
-       int nr_pages = (2 * 1024 * 1024) >> PAGE_CACHE_SHIFT;
+       unsigned long nr_pages = (2 * 1024 * 1024) >> PAGE_CACHE_SHIFT;
        int loops = 0;
        unsigned long progress;
 
@@ -3366,7 +3366,8 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans,
        }
 
        max_reclaim = min(reserved, to_reclaim);
-
+       nr_pages = max_t(unsigned long, nr_pages,
+                        max_reclaim >> PAGE_CACHE_SHIFT);
        while (loops < 1024) {
                /* have the flusher threads jump in and do some IO */
                smp_mb();