X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=mm%2Fpage-writeback.c;h=439cc63ad903fb898192188367670efad4a2d1fa;hb=9a01c3ed5cdb35d9004eb92510ee6ea11b4a5f16;hp=28d6f36a2d79c26c30e25d52d01a8dc95dbaa4ac;hpb=d042380886fb2fc6c4b0fcfe1214ba473769a8e9;p=cascardo%2Flinux.git

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 28d6f36a2d79..439cc63ad903 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1965,36 +1965,6 @@ bool wb_over_bg_thresh(struct bdi_writeback *wb)
 	return false;
 }
 
-void throttle_vm_writeout(gfp_t gfp_mask)
-{
-	unsigned long background_thresh;
-	unsigned long dirty_thresh;
-
-        for ( ; ; ) {
-		global_dirty_limits(&background_thresh, &dirty_thresh);
-		dirty_thresh = hard_dirty_limit(&global_wb_domain, dirty_thresh);
-
-                /*
-                 * Boost the allowable dirty threshold a bit for page
-                 * allocators so they don't get DoS'ed by heavy writers
-                 */
-                dirty_thresh += dirty_thresh / 10;      /* wheeee... */
-
-                if (global_node_page_state(NR_UNSTABLE_NFS) +
-			global_node_page_state(NR_WRITEBACK) <= dirty_thresh)
-                        	break;
-                congestion_wait(BLK_RW_ASYNC, HZ/10);
-
-		/*
-		 * The caller might hold locks which can prevent IO completion
-		 * or progress in the filesystem.  So we cannot just sit here
-		 * waiting for IO to complete.
-		 */
-		if ((gfp_mask & (__GFP_FS|__GFP_IO)) != (__GFP_FS|__GFP_IO))
-			break;
-        }
-}
-
 /*
  * sysctl handler for /proc/sys/vm/dirty_writeback_centisecs
  */
@@ -2746,7 +2716,7 @@ int test_clear_page_writeback(struct page *page)
 	int ret;
 
 	lock_page_memcg(page);
-	if (mapping) {
+	if (mapping && mapping_use_writeback_tags(mapping)) {
 		struct inode *inode = mapping->host;
 		struct backing_dev_info *bdi = inode_to_bdi(inode);
 		unsigned long flags;
@@ -2789,7 +2759,7 @@ int __test_set_page_writeback(struct page *page, bool keep_write)
 	int ret;
 
 	lock_page_memcg(page);
-	if (mapping) {
+	if (mapping && mapping_use_writeback_tags(mapping)) {
 		struct inode *inode = mapping->host;
 		struct backing_dev_info *bdi = inode_to_bdi(inode);
 		unsigned long flags;