linux-kernel - Re: [PATCH] fs/namei.c: micro-optimize acl_permission

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Message-ID: <8385b895-0269-236a-665b-244a386167ac@rasmusvillemoes.dk>
Date:   Mon, 9 Dec 2019 15:54:04 +0100
From:   Rasmus Villemoes <linux@...musvillemoes.dk>
To:     Alexander Viro <viro@...iv.linux.org.uk>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fs/namei.c: micro-optimize acl_permission_check

ping

On 13/11/2019 22.45, Rasmus Villemoes wrote:
> System-installed files are usually 0755 or 0644, so in most cases, we
> can avoid the binary search and the cost of pulling the cred->groups
> array and in_group_p() .text into the cpu cache.