From: Vlastimil Babka <vbabka@suse.cz>
To: Shakeel Butt <shakeel.butt@linux.dev>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@kernel.org>,
Roman Gushchin <roman.gushchin@linux.dev>,
Muchun Song <muchun.song@linux.dev>,
Alexei Starovoitov <ast@kernel.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Jakub Kicinski <kuba@kernel.org>,
Eric Dumazet <edumazet@google.com>,
linux-mm@kvack.org, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org, bpf@vger.kernel.org,
netdev@vger.kernel.org, Meta kernel team <kernel-team@meta.com>
Subject: Re: [PATCH 2/4] memcg: separate local_trylock for memcg and obj
Date: Wed, 7 May 2025 13:46:51 +0200 [thread overview]
Message-ID: <3d99da0d-b08e-416e-82bb-cd44179a424f@suse.cz> (raw)
In-Reply-To: <20250506225533.2580386-3-shakeel.butt@linux.dev>
On 5/7/25 12:55 AM, Shakeel Butt wrote:
> The per-cpu stock_lock protects cached memcg and cached objcg and their
> respective fields. However there is no dependency between these fields
> and it is better to have fine grained separate locks for cached memcg
> and cached objcg. This decoupling of locks allows us to make the memcg
> charge cache and objcg charge cache to be nmi safe independently.
>
> At the moment, memcg charge cache is already nmi safe and this
> decoupling will allow to make memcg charge cache work without disabling
> irqs.
>
> Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
next prev parent reply other threads:[~2025-05-07 11:46 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-06 22:55 [PATCH v3 0/4] memcg: decouple memcg and objcg stocks Shakeel Butt
2025-05-06 22:55 ` [PATCH 1/4] memcg: simplify consume_stock Shakeel Butt
2025-05-07 11:43 ` Vlastimil Babka
2025-05-06 22:55 ` [PATCH 2/4] memcg: separate local_trylock for memcg and obj Shakeel Butt
2025-05-07 11:46 ` Vlastimil Babka [this message]
2025-05-06 22:55 ` [PATCH 3/4] memcg: completely decouple memcg and obj stocks Shakeel Butt
2025-05-06 22:55 ` [PATCH 4/4] memcg: no irq disable for memcg stock lock Shakeel Butt
-- strict thread matches above, loose matches on Subject: below --
2025-04-29 23:04 [PATCH 0/4] memcg: decouple memcg and objcg stocks Shakeel Butt
2025-04-29 23:04 ` [PATCH 2/4] memcg: separate local_trylock for memcg and obj Shakeel Butt
2025-04-30 11:42 ` Vlastimil Babka
2025-04-30 15:03 ` Shakeel Butt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3d99da0d-b08e-416e-82bb-cd44179a424f@suse.cz \
--to=vbabka@suse.cz \
--cc=akpm@linux-foundation.org \
--cc=ast@kernel.org \
--cc=bigeasy@linutronix.de \
--cc=bpf@vger.kernel.org \
--cc=cgroups@vger.kernel.org \
--cc=edumazet@google.com \
--cc=hannes@cmpxchg.org \
--cc=kernel-team@meta.com \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mhocko@kernel.org \
--cc=muchun.song@linux.dev \
--cc=netdev@vger.kernel.org \
--cc=roman.gushchin@linux.dev \
--cc=shakeel.butt@linux.dev \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome