The patch titled
Subject: mm-memcg-prevent-memorysoft_limit_in_bytes-load-store-tearing-v3
has been added to the -mm mm-unstable branch. Its filename is
mm-memcg-prevent-memorysoft_limit_in_bytes-load-store-tearing-v3.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memcg-prevent-memorysoft_limit_in_bytes-load-store-tearing-v3.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Yue Zhao <findns94@xxxxxxxxx>
Subject: mm-memcg-prevent-memorysoft_limit_in_bytes-load-store-tearing-v3
Date: Thu, 9 Mar 2023 00:25:55 +0800
Add [WRITE|READ]_ONCE for all occurrences of memcg->oom_kill_disable,
memcg->swappiness and memcg->soft_limit.
Link: https://lkml.kernel.org/r/20230308162555.14195-5-findns94@xxxxxxxxx
Signed-off-by: Yue Zhao <findns94@xxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Cc: Roman Gushchin <roman.gushchin@xxxxxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Tang Yizhou <tangyeechou@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/memcontrol.c~mm-memcg-prevent-memorysoft_limit_in_bytes-load-store-tearing-v3
+++ a/mm/memcontrol.c
@@ -5347,7 +5347,7 @@ mem_cgroup_css_alloc(struct cgroup_subsy
return ERR_CAST(memcg);
page_counter_set_high(&memcg->memory, PAGE_COUNTER_MAX);
- memcg->soft_limit = PAGE_COUNTER_MAX;
+ WRITE_ONCE(memcg->soft_limit, PAGE_COUNTER_MAX);
#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP)
memcg->zswap_max = PAGE_COUNTER_MAX;
#endif
@@ -5502,7 +5502,7 @@ static void mem_cgroup_css_reset(struct
page_counter_set_min(&memcg->memory, 0);
page_counter_set_low(&memcg->memory, 0);
page_counter_set_high(&memcg->memory, PAGE_COUNTER_MAX);
- memcg->soft_limit = PAGE_COUNTER_MAX;
+ WRITE_ONCE(memcg->soft_limit, PAGE_COUNTER_MAX);
page_counter_set_high(&memcg->swap, PAGE_COUNTER_MAX);
memcg_wb_domain_size_changed(memcg);
}
_
Patches currently in -mm which might be from findns94@xxxxxxxxx are
mm-memcg-prevent-memoryoomgroup-load-store-tearing.patch
mm-memcg-prevent-memoryswappiness-load-store-tearing.patch
mm-memcg-prevent-memoryswappiness-load-store-tearing-v3.patch
mm-memcg-prevent-memoryoom_control-load-store-tearing.patch
mm-memcg-prevent-memoryoom_control-load-store-tearing-v3.patch
mm-memcg-prevent-memorysoft_limit_in_bytes-load-store-tearing.patch
mm-memcg-prevent-memorysoft_limit_in_bytes-load-store-tearing-v3.patch
