From: Linus Torvalds <torvalds@linux-foundation.org>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Serge E. Hallyn" <serge@hallyn.com>,
"Serge E. Hallyn" <serge.hallyn@canonical.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>
Subject: Re: acl_permission_check: disgusting performance
Date: Thu, 12 May 2011 21:16:58 -0700 [thread overview]
Message-ID: <BANLkTin-7HXdbDXaCBmJAncpOauowAB6Bg@mail.gmail.com> (raw)
In-Reply-To: <m1iptf1cm2.fsf@fess.ebiederm.org>
On Thu, May 12, 2011 at 8:52 PM, Eric W. Biederman
<ebiederm@xmission.com> wrote:
>
> In any event an inline version of current_user_ns that returns
> init_user_ns in the case where user namespaces aren't compiled in should
> fix the immediate performance problems by allowing the compiler to
> optimize them out.
Yes. However, then Serge's patch in the next email immediately breaks
that optimization ;^(
Linus
next prev parent reply other threads:[~2011-05-13 4:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-13 0:29 Linus Torvalds
2011-05-13 2:50 ` Serge E. Hallyn
2011-05-13 3:52 ` Eric W. Biederman
2011-05-13 4:16 ` Linus Torvalds [this message]
2011-05-13 4:02 ` Serge E. Hallyn
2011-05-13 4:26 ` Linus Torvalds
2011-05-13 13:19 ` Serge E. Hallyn
2011-05-13 16:16 ` Linus Torvalds
2011-05-13 16:29 ` Linus Torvalds
2011-05-13 18:30 ` Serge E. Hallyn
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