linux-kernel - Re: [PATCH] vfs: shave work on failed file open

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Message-ID: <20230926-worum-angezapft-5c3f7770ad29@brauner>
Date:   Tue, 26 Sep 2023 16:24:26 +0200
From:   Christian Brauner <brauner@...nel.org>
To:     Mateusz Guzik <mjguzik@...il.com>
Cc:     viro@...iv.linux.org.uk, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, torvalds@...ux-foundation.org
Subject: Re: [PATCH] vfs: shave work on failed file open

> > if (WARN_ON_ONCE(atomic_long_cmpxchg(&file->f_count, 1, 0) != 1)) {

> bench again.

Can you see how much of a difference it makes because imho it really
looks a lot nicer then this ugly atomic_read followed by atomic_set...