Btrfs: Scale the bdi ra_pages by the number of devices in the FS
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index b479cdf..46188ee 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -932,7 +932,7 @@
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
bdi_init(bdi);
#endif
- bdi->ra_pages = default_backing_dev_info.ra_pages * 4;
+ bdi->ra_pages = default_backing_dev_info.ra_pages;
bdi->state = 0;
bdi->capabilities = default_backing_dev_info.capabilities;
bdi->unplug_io_fn = btrfs_unplug_io_fn;
@@ -1214,6 +1214,8 @@
(unsigned long long)fs_devices->num_devices);
goto fail_sb_buffer;
}
+ fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super);
+
nodesize = btrfs_super_nodesize(disk_super);
leafsize = btrfs_super_leafsize(disk_super);
sectorsize = btrfs_super_sectorsize(disk_super);
