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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 13 May 2011 09:16:40 -0700
Message-ID: <BANLkTi=yyoMXNqGtVX9KxHjVaDVGW9uzdA@mail.gmail.com>
Subject: Re: acl_permission_check: disgusting performance
To: "Serge E. Hallyn" <serge@hallyn.com>
Cc: "Serge E. Hallyn" <serge.hallyn@canonical.com>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Daniel Lezcano <daniel.lezcano@free.fr>,
        David Howells <dhowells@redhat.com>, James Morris <jmorris@namei.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        containers@lists.linux-foundation.org,
        Al Viro <viro@zeniv.linux.org.uk>
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On Fri, May 13, 2011 at 6:19 AM, Serge E. Hallyn <serge@hallyn.com> wrote:
>
> Compile-tested with and without CONFIG_USERNS.

Looks ok to me. And generates good code for acl_permission_check
without CONFIG_USER_NS.

I'll see how much that function drops on the kernel profiles..

                       Linus
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