From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Aniket Gattani <aniketgattani@google.com>,
"Paul E . McKenney" <paulmck@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>, Ben Segall <bsegall@google.com>,
Josh Don <joshdon@google.com>,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH 1/2] sched/membarrier: Use per-CPU mutexes for targeted commands
Date: Fri, 10 Apr 2026 08:48:35 -0400 [thread overview]
Message-ID: <addfe6a5-f773-46e8-b0f8-1699034720eb@efficios.com> (raw)
In-Reply-To: <20260409212223.2072418-2-aniketgattani@google.com>
On 2026-04-09 17:22, Aniket Gattani wrote:
[...]
> static DEFINE_MUTEX(membarrier_ipi_mutex);
> -#define SERIALIZE_IPI() guard(mutex)(&membarrier_ipi_mutex)
> +static DEFINE_PER_CPU(struct mutex, membarrier_cpu_mutexes);
> +
I'd prefer:
SERIALIZE_IPI() -> global
SERIALIZE_IPI_CPU(cpu) -> per-cpu mutex
Rather than the -1 trick.
Thanks,
Mathieu
--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com
next prev parent reply other threads:[~2026-04-10 12:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-09 21:22 [PATCH 0/2] sched/membarrier: Use per-CPU mutexes for targeted commands Aniket Gattani
2026-04-09 21:22 ` [PATCH 1/2] " Aniket Gattani
2026-04-10 12:48 ` Mathieu Desnoyers [this message]
2026-04-10 23:44 ` Aniket Gattani
2026-04-10 12:56 ` Peter Zijlstra
2026-04-10 23:55 ` Aniket Gattani
2026-04-28 12:35 ` Peter Zijlstra
2026-04-09 21:22 ` [PATCH 2/2] selftests/membarrier: Add rseq stress test for CFS throttle interactions Aniket Gattani
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