The patch titled
Subject: mm: memcontrol: clean up reclaim size variable use in try_charge()
has been added to the -mm tree. Its filename is
mm-memcontrol-clean-up-reclaim-size-variable-use-in-try_charge.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-clean-up-reclaim-size-variable-use-in-try_charge.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-clean-up-reclaim-size-variable-use-in-try_charge.patch
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------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: mm: memcontrol: clean up reclaim size variable use in try_charge()
Charge reclaim and OOM currently use the charge batch variable, but
batching is already disabled at that point. To simplify the charge logic,
the batch variable is reset to the original request size when reclaim is
entered, so it's functionally equal, but it's misleading.
Switch reclaim/OOM to nr_pages, which is the original request size.
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff -puN mm/memcontrol.c~mm-memcontrol-clean-up-reclaim-size-variable-use-in-try_charge mm/memcontrol.c
--- a/mm/memcontrol.c~mm-memcontrol-clean-up-reclaim-size-variable-use-in-try_charge
+++ a/mm/memcontrol.c
@@ -2574,7 +2574,7 @@ retry:
nr_reclaimed = mem_cgroup_reclaim(mem_over_limit, gfp_mask, flags);
- if (mem_cgroup_margin(mem_over_limit) >= batch)
+ if (mem_cgroup_margin(mem_over_limit) >= nr_pages)
goto retry;
if (gfp_mask & __GFP_NORETRY)
@@ -2588,7 +2588,7 @@ retry:
* unlikely to succeed so close to the limit, and we fall back
* to regular pages anyway in case of failure.
*/
- if (nr_reclaimed && batch <= (1 << PAGE_ALLOC_COSTLY_ORDER))
+ if (nr_reclaimed && nr_pages <= (1 << PAGE_ALLOC_COSTLY_ORDER))
goto retry;
/*
* At task move, charge accounts can be doubly counted. So, it's
@@ -2606,7 +2606,7 @@ retry:
if (fatal_signal_pending(current))
goto bypass;
- mem_cgroup_oom(mem_over_limit, gfp_mask, get_order(batch));
+ mem_cgroup_oom(mem_over_limit, gfp_mask, get_order(nr_pages));
nomem:
if (!(gfp_mask & __GFP_NOFAIL))
return -ENOMEM;
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
origin.patch
vmalloc-use-rcu-list-iterator-to-reduce-vmap_area_lock-contention.patch
mm-page-flags-clean-up-the-page-flag-test-set-clear-macros.patch
mm-memcontrol-fold-mem_cgroup_do_charge.patch
mm-memcontrol-rearrange-charging-fast-path.patch
mm-memcontrol-reclaim-at-least-once-for-__gfp_noretry.patch
mm-huge_memory-use-gfp_transhuge-when-charging-huge-pages.patch
mm-memcontrol-retry-reclaim-for-oom-disabled-and-__gfp_nofail-charges.patch
mm-memcontrol-remove-explicit-oom-parameter-in-charge-path.patch
mm-memcontrol-simplify-move-precharge-function.patch
mm-memcontrol-catch-root-bypass-in-move-precharge.patch
mm-memcontrol-use-root_mem_cgroup-res_counter.patch
mm-memcontrol-remove-ordering-between-pc-mem_cgroup-and-pagecgroupused.patch
mm-memcontrol-do-not-acquire-page_cgroup-lock-for-kmem-pages.patch
mm-memcontrol-rewrite-charge-api.patch
mm-memcontrol-rewrite-charge-api-fix-3.patch
mm-memcontrol-rewrite-charge-api-fix-shmem_unuse.patch
mm-memcontrol-rewrite-charge-api-fix-hugetlb-charging.patch
mm-memcontrol-rewrite-uncharge-api.patch
mm-memcontrol-rewrite-uncharge-api-fix-2.patch
mm-memcontrol-rewrite-uncharge-api-fix-4.patch
mm-memcontrol-rewrite-uncharge-api-fix-5.patch
mm-memcontrol-rewrite-uncharge-api-fix-uncharge-from-irq-context.patch
mm-memcontrol-rewrite-uncharge-api-fix-double-migration-v2.patch
mm-memcontrol-rewrite-uncharge-api-fix-migrate-before-re-mapping.patch
mm-memcontrol-rewrite-uncharge-api-fix-page-cache-migration.patch
mm-memcontrol-rewrite-uncharge-api-fix-page-cache-migration-2.patch
mm-memcontrol-rewrite-uncharge-api-fix-clear-page-mapping-in-migration.patch
mm-memcontrol-use-page-lists-for-uncharge-batching.patch
mm-memcontrol-use-page-lists-for-uncharge-batching-fix-hugetlb-page-lru.patch
page-cgroup-trivial-cleanup.patch
page-cgroup-get-rid-of-nr_pcg_flags.patch
memcg-remove-lookup_cgroup_page-prototype.patch
mm-vmscan-remove-remains-of-kswapd-managed-zone-all_unreclaimable.patch
mm-vmscan-rework-compaction-ready-signaling-in-direct-reclaim.patch
mm-vmscan-rework-compaction-ready-signaling-in-direct-reclaim-fix.patch
mm-vmscan-remove-all_unreclaimable.patch
mm-vmscan-remove-all_unreclaimable-fix.patch
mm-vmscan-move-swappiness-out-of-scan_control.patch
mm-vmscan-clean-up-struct-scan_control-v2.patch
mm-export-nr_shmem-via-sysinfo2-si_meminfo-interfaces.patch
mm-replace-init_page_accessed-by-__setpagereferenced.patch
mm-update-the-description-for-vm_total_pages.patch
mm-vmscan-report-the-number-of-file-anon-pages-respectively.patch
mm-pagemap-avoid-unnecessary-overhead-when-tracepoints-are-deactivated.patch
mm-rearrange-zone-fields-into-read-only-page-alloc-statistics-and-page-reclaim-lines.patch
mm-move-zone-pages_scanned-into-a-vmstat-counter.patch
mm-vmscan-only-update-per-cpu-thresholds-for-online-cpu.patch
mm-page_alloc-abort-fair-zone-allocation-policy-when-remotes-nodes-are-encountered.patch
mm-page_alloc-reduce-cost-of-the-fair-zone-allocation-policy.patch
mm-writeback-prevent-race-when-calculating-dirty-limits.patch
slub-remove-kmemcg-id-from-create_unique_id.patch
mm-oom-ensure-memoryless-node-zonelist-always-includes-zones.patch
mm-oom-ensure-memoryless-node-zonelist-always-includes-zones-fix.patch
mm-oom-rename-zonelist-locking-functions.patch
mm-thp-restructure-thp-avoidance-of-light-synchronous-migration.patch
mm-vmscan-fix-an-outdated-comment-still-mentioning-get_scan_ratio.patch
memcg-vmscan-fix-forced-scan-of-anonymous-pages.patch
memcg-vmscan-fix-forced-scan-of-anonymous-pages-fix-cleanups.patch
mm-memcontrol-avoid-charge-statistics-churn-during-page-migration.patch
mm-memcontrol-clean-up-reclaim-size-variable-use-in-try_charge.patch
nilfs2-integrate-sysfs-support-into-driver-fix.patch
linux-next.patch
debugging-keep-track-of-page-owners.patch
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