tools/vm/page_owner: increase temporary buffer size

Page owner will be changed to store more deep stacktrace so current
temporary buffer size isn't enough.  Increase it.

Link: http://lkml.kernel.org/r/1464230275-25791-5-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Alexander Potapenko <glider@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 2 deletions

diff --git a/tools/vm/page_owner_sort.c b/tools/vm/page_owner_sort.c
index 77147b42d598..f1c055f3c243 100644
--- a/tools/vm/page_owner_sort.c
+++ b/tools/vm/page_owner_sort.c
@@ -79,12 +79,12 @@ static void add_list(char *buf, int len)
         }
 }
 
-#define BUF_SIZE        1024
+#define BUF_SIZE        (128 * 1024)
 
 int main(int argc, char **argv)
 {
         FILE *fin, *fout;
-        char buf[BUF_SIZE];
+        char *buf;
         int ret, i, count;
         struct block_list *list2;
         struct stat st;
@@ -107,6 +107,11 @@ int main(int argc, char **argv)
         max_size = st.st_size / 100; /* hack ... */
 
         list = malloc(max_size * sizeof(*list));
+        buf = malloc(BUF_SIZE);
+        if (!list || !buf) {
+                printf("Out of memory\n");
+                exit(1);
+        }
 
         for ( ; ; ) {
                 ret = read_block(buf, BUF_SIZE, fin);