X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=mm%2Fvmscan.c;h=10f9c59aed5536b88addea2a99bd4539ebf5a9f2;hp=d29b2bdb9e0311137e5e01adad5a1a96201fe25f;hb=ee72886d8ed5d9de3fa0ed3b99a7ca7702576a96;hpb=e10d59f2c3decaf22cc5d3de7040eba202bc2df3

diff --git a/mm/vmscan.c b/mm/vmscan.c
index d29b2bdb9e03..10f9c59aed55 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -865,6 +865,15 @@ static unsigned long shrink_page_list(struct list_head *page_list,
 		if (PageDirty(page)) {
 			nr_dirty++;
 
+			/*
+			 * Only kswapd can writeback filesystem pages to
+			 * avoid risk of stack overflow
+			 */
+			if (page_is_file_cache(page) && !current_is_kswapd()) {
+				inc_zone_page_state(page, NR_VMSCAN_WRITE_SKIP);
+				goto keep_locked;
+			}
+
 			if (references == PAGEREF_RECLAIM_CLEAN)
 				goto keep_locked;
 			if (!may_enter_fs)