From: "Serge E. Hallyn" <serge.hallyn@canonical.com>
To: Pavel Emelyanov <xemul@parallels.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Linux Containers <containers@lists.osdl.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] user_ns: Improve the user_ns on-the-slab packaging
Date: Tue, 7 Dec 2010 08:27:47 -0600 [thread overview]
Message-ID: <20101207142747.GB4674@hallyn.com> (raw)
In-Reply-To: <4CFE40D1.5000309@parallels.com>
Quoting Pavel Emelyanov (xemul@parallels.com):
> Currently on 64-bit arch the user_namespace is 2096 and when
> being kmalloc-ed it resides on a 4k slab wasting 2003 bytes.
>
> If we allocate a separate cache for it and reduce the hash size
> from 128 to 64 chains the packaging becomes *much* better - the
Hey Pavel,
I trust you've done some performance tests and found no
regressions with a few hundred users?
-serge
next prev parent reply other threads:[~2010-12-07 14:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-07 14:12 [PATCH] user_ns: Improve the user_ns on-the-slab packaging Pavel Emelyanov
2010-12-07 14:27 ` Serge E. Hallyn [this message]
2010-12-07 14:33 ` Pavel Emelyanov
2010-12-07 14:50 ` Serge E. Hallyn
2010-12-07 22:13 ` Andrew Morton
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20101207142747.GB4674@hallyn.com \
--to=serge.hallyn@canonical.com \
--cc=akpm@linux-foundation.org \
--cc=containers@lists.osdl.org \
--cc=linux-kernel@vger.kernel.org \
--cc=xemul@parallels.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox