NTFS: In attrib.c::ntfs_attr_set() call balance_dirty_pages_ratelimited()

      and cond_resched() in the main loop as we could be dirtying a lot of
      pages and this ensures we play nice with the VM and the system as a
      whole.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/ntfs/attrib.c b/fs/ntfs/attrib.c
index bc25e88ad468..338e47144fc9 100644
--- a/fs/ntfs/attrib.c
+++ b/fs/ntfs/attrib.c
@@ -21,7 +21,9 @@
  */
 
 #include <linux/buffer_head.h>
+#include <linux/sched.h>
 #include <linux/swap.h>
+#include <linux/writeback.h>
 
 #include "attrib.h"
 #include "debug.h"
@@ -2590,6 +2592,8 @@ int ntfs_attr_set(ntfs_inode *ni, const s64 ofs, const s64 cnt, const u8 val)
                 /* Finally unlock and release the page. */
                 unlock_page(page);
                 page_cache_release(page);
+                balance_dirty_pages_ratelimited(mapping);
+                cond_resched();
         }
         /* If there is a last partial page, need to do it the slow way. */
         if (end_ofs) {