tree: https://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git master head: 570b2b152bf32db746eb6de1a144491b5f7ca34f commit: 3bfb81930e877c80af87a9954ca5714aa6ae60ee [3/11] writeback: allow for dirty metadata accounting config: i386-randconfig-s0-201642 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: git checkout 3bfb81930e877c80af87a9954ca5714aa6ae60ee # save the attached .config to linux build tree make ARCH=i386
All warnings (new ones prefixed by >>):
mm/vmstat.c: In function 'zoneinfo_show_print':
>> mm/vmstat.c:1445:4: warning: iteration 28 invokes undefined behavior
>> [-Waggressive-loop-optimizations]
seq_printf(m, "\n %-12s %lu",
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vmstat_text[i + NR_VM_ZONE_STAT_ITEMS],
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
node_page_state(pgdat, i));
~~~~~~~~~~~~~~~~~~~~~~~~~~
mm/vmstat.c:1444:3: note: within this loop
for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) {
^~~
vim +1445 mm/vmstat.c
e2ecc8a7 Mel Gorman 2016-07-28 1429 return zone ==
compare;
e2ecc8a7 Mel Gorman 2016-07-28 1430 }
e2ecc8a7 Mel Gorman 2016-07-28 1431
e2ecc8a7 Mel Gorman 2016-07-28 1432 /* The zone must be somewhere!
*/
e2ecc8a7 Mel Gorman 2016-07-28 1433 WARN_ON_ONCE(1);
e2ecc8a7 Mel Gorman 2016-07-28 1434 return false;
e2ecc8a7 Mel Gorman 2016-07-28 1435 }
e2ecc8a7 Mel Gorman 2016-07-28 1436
467c996c Mel Gorman 2007-10-16 1437 static void
zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
467c996c Mel Gorman 2007-10-16 1438
struct zone *zone)
f6ac2354 Christoph Lameter 2006-06-30 1439 {
f6ac2354 Christoph Lameter 2006-06-30 1440 int i;
f6ac2354 Christoph Lameter 2006-06-30 1441 seq_printf(m, "Node %d, zone
%8s", pgdat->node_id, zone->name);
e2ecc8a7 Mel Gorman 2016-07-28 1442 if
(is_zone_first_populated(pgdat, zone)) {
e2ecc8a7 Mel Gorman 2016-07-28 1443 seq_printf(m, "\n
per-node stats");
e2ecc8a7 Mel Gorman 2016-07-28 1444 for (i = 0; i <
NR_VM_NODE_STAT_ITEMS; i++) {
e2ecc8a7 Mel Gorman 2016-07-28 @1445 seq_printf(m,
"\n %-12s %lu",
e2ecc8a7 Mel Gorman 2016-07-28 1446
vmstat_text[i + NR_VM_ZONE_STAT_ITEMS],
e2ecc8a7 Mel Gorman 2016-07-28 1447
node_page_state(pgdat, i));
e2ecc8a7 Mel Gorman 2016-07-28 1448 }
e2ecc8a7 Mel Gorman 2016-07-28 1449 }
f6ac2354 Christoph Lameter 2006-06-30 1450 seq_printf(m,
f6ac2354 Christoph Lameter 2006-06-30 1451 "\n pages free
%lu"
f6ac2354 Christoph Lameter 2006-06-30 1452 "\n min
%lu"
f6ac2354 Christoph Lameter 2006-06-30 1453 "\n low
%lu"
:::::: The code at line 1445 was first introduced by commit
:::::: e2ecc8a79ed49f7838b4fdf352c4c48cec9424ac mm, vmstat: print node-based
stats in zoneinfo file
:::::: TO: Mel Gorman <mgor...@techsingularity.net>
:::::: CC: Linus Torvalds <torva...@linux-foundation.org>
---
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