linux-kernel - Re: [GIT PULL] VFIO fix for v5.8-rc7

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Date:   Mon, 20 Jul 2020 13:33:29 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Alex Williamson <alex.williamson@...hat.com>
Cc:     "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [GIT PULL] VFIO fix for v5.8-rc7

On Mon, Jul 20, 2020 at 7:34 AM Alex Williamson
<alex.williamson@...hat.com> wrote:
>
> VFIO fixes for v5.8-rc7
>
>  - Fix race with eventfd ctx cleared outside of mutex (Zeng Tao)

Why does this take and then re-take the lock immediately? That just
looks insane.

I realize that this isn't likely to be a performance-critical path,
but this is a basic source cleanliness issue. Doing silly things is
silly, and shouldn't be done, even if they don't matter.

              Linus