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Date: Thu, 9 Jul 2026 15:58:59 +0200
From: Frederic Weisbecker <frederic@kernel.org>
To: Puranjay Mohan <puranjay@kernel.org>
Cc: rcu@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-trace-kernel@vger.kernel.org,
	"Paul E. McKenney" <paulmck@kernel.org>,
	Neeraj Upadhyay <neeraj.upadhyay@kernel.org>,
	Joel Fernandes <joelagnelf@nvidia.com>,
	Josh Triplett <josh@joshtriplett.org>,
	Boqun Feng <boqun@kernel.org>, Uladzislau Rezki <urezki@gmail.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Lai Jiangshan <jiangshanlai@gmail.com>,
	Zqiang <qiang.zhang@linux.dev>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Davidlohr Bueso <dave@stgolabs.net>,
	Breno Leitao <leitao@debian.org>
Subject: Re: [PATCH v1 06/11] rcu: Enable RCU callbacks to benefit from
 expedited grace periods
Message-ID: <ak-pI2CefDoz0D0M@localhost.localdomain>
References: <20260624132356.516959-1-puranjay@kernel.org>
 <20260624132356.516959-7-puranjay@kernel.org>
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In-Reply-To: <20260624132356.516959-7-puranjay@kernel.org>

Le Wed, Jun 24, 2026 at 06:23:48AM -0700, Puranjay Mohan a écrit :
> Currently, RCU callbacks only track normal grace-period sequence
> numbers.  This means callbacks must wait for normal grace periods to
> complete even when expedited grace periods have already elapsed.

The changelog still misses the reason for this change. I had to read
the lwn article to understand that this matters under memory pressure
in order to release objects faster.

Thanks.

-- 
Frederic Weisbecker
SUSE Labs