From: Michal Hocko <mhocko@suse.com>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: bpf <bpf@vger.kernel.org>, Andrii Nakryiko <andrii@kernel.org>,
Kumar Kartikeya Dwivedi <memxor@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Vlastimil Babka <vbabka@suse.cz>,
Sebastian Sewior <bigeasy@linutronix.de>,
Steven Rostedt <rostedt@goodmis.org>,
Hou Tao <houtao1@huawei.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Shakeel Butt <shakeel.butt@linux.dev>,
Matthew Wilcox <willy@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Jann Horn <jannh@google.com>, Tejun Heo <tj@kernel.org>,
linux-mm <linux-mm@kvack.org>, Kernel Team <kernel-team@fb.com>
Subject: Re: [PATCH bpf-next v3 4/6] memcg: Use trylock to access memcg stock_lock.
Date: Thu, 19 Dec 2024 08:27:05 +0100 [thread overview]
Message-ID: <Z2PKyU3hJY5e0DUE@tiehlicka> (raw)
In-Reply-To: <Z2PGetahl-7EcoIi@tiehlicka>
On Thu 19-12-24 08:08:44, Michal Hocko wrote:
> All that being said, the message I wanted to get through is that atomic
> (NOWAIT) charges could be trully reentrant if the stock local lock uses
> trylock. We do not need a dedicated gfp flag for that now.
And I want to add. Not only we can achieve that, I also think this is
desirable because for !RT this will be no functional change and for RT
it makes more sense to simply do deterministic (albeit more costly
page_counter update) than spin over a lock to use the batch (or learn
the batch cannot be used).
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2024-12-19 7:27 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-18 3:07 [PATCH bpf-next v3 0/6] bpf, mm: Introduce try_alloc_pages() alexei.starovoitov
2024-12-18 3:07 ` [PATCH bpf-next v3 1/6] mm, bpf: Introduce try_alloc_pages() for opportunistic page allocation alexei.starovoitov
2024-12-18 11:32 ` Michal Hocko
2024-12-19 0:05 ` Shakeel Butt
2024-12-19 7:18 ` Michal Hocko
2024-12-19 1:18 ` Alexei Starovoitov
2024-12-19 7:13 ` Michal Hocko
2024-12-20 0:41 ` Alexei Starovoitov
2024-12-19 0:10 ` Shakeel Butt
2024-12-19 1:39 ` Alexei Starovoitov
2024-12-18 3:07 ` [PATCH bpf-next v3 2/6] mm, bpf: Introduce free_pages_nolock() alexei.starovoitov
2024-12-18 4:58 ` Yosry Ahmed
2024-12-18 5:33 ` Alexei Starovoitov
2024-12-18 5:57 ` Yosry Ahmed
2024-12-18 6:37 ` Alexei Starovoitov
2024-12-18 6:49 ` Yosry Ahmed
2024-12-18 7:25 ` Alexei Starovoitov
2024-12-18 7:40 ` Yosry Ahmed
2024-12-18 11:32 ` Michal Hocko
2024-12-19 1:45 ` Alexei Starovoitov
2024-12-19 7:03 ` Michal Hocko
2024-12-20 0:42 ` Alexei Starovoitov
2024-12-18 3:07 ` [PATCH bpf-next v3 3/6] locking/local_lock: Introduce local_trylock_irqsave() alexei.starovoitov
2024-12-18 3:07 ` [PATCH bpf-next v3 4/6] memcg: Use trylock to access memcg stock_lock alexei.starovoitov
2024-12-18 11:32 ` Michal Hocko
2024-12-19 1:53 ` Alexei Starovoitov
2024-12-19 7:08 ` Michal Hocko
2024-12-19 7:27 ` Michal Hocko [this message]
2024-12-19 7:52 ` Michal Hocko
2024-12-20 0:39 ` Alexei Starovoitov
2024-12-20 8:24 ` Michal Hocko
2024-12-20 16:10 ` Alexei Starovoitov
2024-12-20 19:45 ` Shakeel Butt
2024-12-21 7:20 ` Michal Hocko
2024-12-18 3:07 ` [PATCH bpf-next v3 5/6] mm, bpf: Use memcg in try_alloc_pages() alexei.starovoitov
2024-12-18 3:07 ` [PATCH bpf-next v3 6/6] bpf: Use try_alloc_pages() to allocate pages for bpf needs alexei.starovoitov
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