The patch titled
Subject: mm/vmscan: sc->reclaim_idx must be a valid zone index
has been added to the -mm tree. Its filename is
mm-vmscan-sc-reclaim_idx-must-be-a-valid-zone-index.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-vmscan-sc-reclaim_idx-must-be-a-valid-zone-index.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-vmscan-sc-reclaim_idx-must-be-a-valid-zone-index.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: mm/vmscan: sc->reclaim_idx must be a valid zone index
lruvec_lru_size() is only used in get_scan_count(), so the only possible
zone_idx is sc->reclaim_idx. Since sc->reclaim_idx is ensured to be a
valid zone idex, we can remove the extra check for zone iteration.
Link: https://lkml.kernel.org/r/20220317234624.23358-1-richard.weiyang@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/mm/vmscan.c~mm-vmscan-sc-reclaim_idx-must-be-a-valid-zone-index
+++ a/mm/vmscan.c
@@ -587,7 +587,7 @@ unsigned long zone_reclaimable_pages(str
* lruvec_lru_size - Returns the number of pages on the given LRU list.
* @lruvec: lru vector
* @lru: lru to use
- * @zone_idx: zones to consider (use MAX_NR_ZONES for the whole LRU list)
+ * @zone_idx: zones to consider (use MAX_NR_ZONES - 1 for the whole LRU list)
*/
static unsigned long lruvec_lru_size(struct lruvec *lruvec, enum lru_list lru,
int zone_idx)
@@ -595,7 +595,7 @@ static unsigned long lruvec_lru_size(str
unsigned long size = 0;
int zid;
- for (zid = 0; zid <= zone_idx && zid < MAX_NR_ZONES; zid++) {
+ for (zid = 0; zid <= zone_idx; zid++) {
struct zone *zone = &lruvec_pgdat(lruvec)->node_zones[zid];
if (!managed_zone(zone))
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
mm-page_alloc-add-same-penalty-is-enough-to-get-round-robin-order.patch
mm-vmscan-reclaim-only-affects-managed_zones.patch
mm-vmscan-make-sure-wakeup_kswapd-with-managed-zone.patch
mm-vmscan-sc-reclaim_idx-must-be-a-valid-zone-index.patch
