Re: [PATCH v1 06/11] rcu: Enable RCU callbacks to benefit from expedited grace periods

Puranjay Mohan <[email protected]> Thu, 9 Jul 2026 16:36:16 +0100

Newsgroups	org.kernel.vger.rcu,org.kernel.vger.linux-kernel,org.kernel.vger.linux-trace-kernel
Message-ID	<CANk7y0j=TcK2tYhrmAf9dP0ab=1kzAu=gFasjU76ZFrW5xQ4mA@mail.gmail.com>

On Thu, Jul 9, 2026 at 2:59 PM Frederic Weisbecker <[email protected]> wrote:
>
> 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.
>

I will update the commit message in the next version.

Thanks for your review.