linux-kernel - Re: [PATCH] user_ns: Improve the user

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 7 Dec 2010 08:27:47 -0600
From:	"Serge E. Hallyn" <serge.hallyn@...onical.com>
To:	Pavel Emelyanov <xemul@...allels.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Containers <containers@...ts.osdl.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] user_ns: Improve the user_ns on-the-slab packaging

Quoting Pavel Emelyanov (xemul@...allels.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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/