Btrfs: Use a higher default ra pages

Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 6a70e49..134b722 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -694,7 +694,7 @@ void btrfs_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
 static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi)
 {
        bdi_init(bdi);
-       bdi->ra_pages   = default_backing_dev_info.ra_pages;
+       bdi->ra_pages   = default_backing_dev_info.ra_pages * 4;
        bdi->state              = 0;
        bdi->capabilities       = default_backing_dev_info.capabilities;
        bdi->unplug_io_fn       = btrfs_unplug_io_fn;