From: Shakeel Butt <shakeelb@google.com>
To: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Waiman Long <longman@redhat.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Muchun Song <songmuchun@bytedance.com>
Subject: Re: [PATCH v2] mm/list_lru: Fix possible race in memcg_reparent_list_lru_node()
Date: Thu, 31 Mar 2022 06:39:56 +0000 [thread overview]
Message-ID: <20220331063956.5uqnab64cqnmcwyr@google.com> (raw)
In-Reply-To: <89B53D3A-FCC5-4107-8D49-81D5B9AE5172@linux.dev>
On Wed, Mar 30, 2022 at 07:48:45PM -0700, Roman Gushchin wrote:
>
>
[...]
>
>
> But honestly, I’d drop the original optimization together with the fix, if only there is no _real world_ data on the problem and the improvement. It seems like it has started as a nice simple improvement, but the race makes it complex and probably not worth the added complexity and fragility.
I agree with dropping the original optimization as it is not really
fixing an observed issue which may justify adding some complexity.
thanks,
Shakeel
next prev parent reply other threads:[~2022-03-31 6:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-30 17:26 Waiman Long
2022-03-30 19:46 ` Roman Gushchin
2022-03-31 2:14 ` Andrew Morton
2022-03-31 2:48 ` Roman Gushchin
2022-03-31 6:39 ` Shakeel Butt [this message]
2022-03-31 7:46 ` Michal Hocko
2022-04-01 1:11 ` Andrew Morton
2022-04-01 4:23 ` Shakeel Butt
2022-04-01 4:30 ` Muchun Song
2022-04-01 11:28 ` Michal Hocko
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