X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=mm%2Ffadvise.c;h=2ad7adf4f0a459bcd3be1860d30a6382c8083a40;hb=018d5ef2048fcab339467bcbebccf588c9bd2531;hp=3bcfd81db45ea1776b169cdc91430c7556dd14f8;hpb=899dd388853071f5c8848545209d4e2c5d95b1d9;p=karo-tx-linux.git

diff --git a/mm/fadvise.c b/mm/fadvise.c
index 3bcfd81db45e..2ad7adf4f0a4 100644
--- a/mm/fadvise.c
+++ b/mm/fadvise.c
@@ -117,7 +117,11 @@ SYSCALL_DEFINE4(fadvise64_64, int, fd, loff_t, offset, loff_t, len, int, advice)
 			__filemap_fdatawrite_range(mapping, offset, endbyte,
 						   WB_SYNC_NONE);
 
-		/* First and last FULL page! */
+		/*
+		 * First and last FULL page! Partial pages are deliberately
+		 * preserved on the expectation that it is better to preserve
+		 * needed memory than to discard unneeded memory.
+		 */
 		start_index = (offset+(PAGE_CACHE_SIZE-1)) >> PAGE_CACHE_SHIFT;
 		end_index = (endbyte >> PAGE_CACHE_SHIFT);