linux-kernel - Re: [PATCH 0/8] simplify ep

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Date:   Fri, 6 Nov 2020 15:35:22 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Soheil Hassas Yeganeh <soheil.kdev@...il.com>
Cc:     Al Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Davidlohr Bueso <dave@...olabs.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Willem de Bruijn <willemb@...gle.com>,
        Khazhismel Kumykov <khazhy@...gle.com>,
        Guantao Liu <guantaol@...gle.com>,
        Soheil Hassas Yeganeh <soheil@...gle.com>
Subject: Re: [PATCH 0/8] simplify ep_poll

On Fri, Nov 6, 2020 at 3:17 PM Soheil Hassas Yeganeh
<soheil.kdev@...il.com> wrote:
>
> The first patch in the series is a fix for the epoll race in
> presence of timeouts, so that it can be cleanly backported to all
> affected stable kernels.
>
> The rest of the patch series simplify the ep_poll() implementation.
> Some of these simplifications result in minor performance enhancements
> as well.  We have kept these changes under self tests and internal
> benchmarks for a few days, and there are minor (1-2%) performance
> enhancements as a result.

>From just looking at the patches (not the end result - I didn't
actually apply them), it looks sane to me.

             Linus