From: Roman Gushchin <roman.gushchin@linux.dev>
To: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@kernel.org>,
Muchun Song <muchun.song@linux.dev>,
Vlastimil Babka <vbabka@suse.cz>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
linux-mm@kvack.org, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org,
Meta kernel team <kernel-team@meta.com>
Subject: Re: [PATCH 6/9] memcg: do obj_cgroup_put inside drain_obj_stock
Date: Tue, 18 Mar 2025 01:07:18 +0000 [thread overview]
Message-ID: <Z9jHRnXnAnL0Mcjn@google.com> (raw)
In-Reply-To: <20250315174930.1769599-7-shakeel.butt@linux.dev>
On Sat, Mar 15, 2025 at 10:49:27AM -0700, Shakeel Butt wrote:
> Previously we could not call obj_cgroup_put() inside the local lock
> because on the put on the last reference, the release function
> obj_cgroup_release() may try to re-acquire the local lock. However that
> chain has been broken. Now simply do obj_cgroup_put() inside
> drain_obj_stock() instead of returning the old objcg.
>
> Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev>
Nice one too!
Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev>
next prev parent reply other threads:[~2025-03-18 1:07 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-15 17:49 [PATCH 0/9] memcg: cleanup per-cpu stock Shakeel Butt
2025-03-15 17:49 ` [PATCH 1/9] memcg: remove root memcg check from refill_stock Shakeel Butt
2025-03-18 0:39 ` Roman Gushchin
2025-03-18 7:59 ` Vlastimil Babka
2025-03-21 16:55 ` Shakeel Butt
2025-03-15 17:49 ` [PATCH 2/9] memcg: decouple drain_obj_stock from local stock Shakeel Butt
2025-03-18 0:44 ` Roman Gushchin
2025-03-15 17:49 ` [PATCH 3/9] memcg: introduce memcg_uncharge Shakeel Butt
2025-03-18 0:50 ` Roman Gushchin
2025-03-15 17:49 ` [PATCH 4/9] memcg: manually inline __refill_stock Shakeel Butt
2025-03-18 0:58 ` Roman Gushchin
2025-03-18 7:58 ` Vlastimil Babka
2025-03-15 17:49 ` [PATCH 5/9] memcg: no refilling stock from obj_cgroup_release Shakeel Butt
2025-03-18 1:06 ` Roman Gushchin
2025-03-15 17:49 ` [PATCH 6/9] memcg: do obj_cgroup_put inside drain_obj_stock Shakeel Butt
2025-03-18 1:07 ` Roman Gushchin [this message]
2025-03-15 17:49 ` [PATCH 7/9] memcg: use __mod_memcg_state in drain_obj_stock Shakeel Butt
2025-03-17 20:56 ` Vlastimil Babka
2025-03-17 21:54 ` Shakeel Butt
2025-03-18 8:02 ` Vlastimil Babka
2025-03-18 1:13 ` Roman Gushchin
2025-03-18 7:50 ` Vlastimil Babka
2025-03-15 17:49 ` [PATCH 8/9] memcg: combine slab obj stock charging and accounting Shakeel Butt
2025-03-18 1:20 ` Roman Gushchin
2025-03-15 17:49 ` [PATCH 9/9] memcg: manually inline replace_stock_objcg Shakeel Butt
2025-03-18 1:21 ` Roman Gushchin
2025-03-18 8:00 ` Vlastimil Babka
2025-03-16 3:57 ` [PATCH 0/9] memcg: cleanup per-cpu stock Andrew Morton
2025-03-16 4:43 ` Shakeel Butt
2025-03-16 15:59 ` Alexei Starovoitov
2025-03-17 18:11 ` Shakeel Butt
2025-03-17 20:27 ` Andrew Morton
2025-04-02 20:40 ` Shakeel Butt
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