linux-kernel - Re: [PATCH] [RFC] TAINT

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]

Message-ID: <alpine.DEB.2.11.1408191901370.21171@gentwo.org>
Date:	Tue, 19 Aug 2014 19:03:03 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Laura Abbott <lauraa@...eaurora.org>
cc:	Dave Hansen <dave@...1.net>, linux-kernel@...r.kernel.org,
	dave.hansen@...ux.intel.com, peterz@...radead.org,
	mingo@...hat.com, ak@...ux.intel.com, tim.c.chen@...ux.intel.com,
	akpm@...ux-foundation.org, penberg@...nel.org, linux-mm@...ck.org
Subject: Re: [PATCH] [RFC] TAINT_PERFORMANCE

On Tue, 19 Aug 2014, Laura Abbott wrote:

> I nominate CONFIG_DEBUG_PAGEALLOC, CONFIG_SLUB_DEBUG,
> CONFIG_SLUB_DEBUG_ON as well since I've wasted days debugging
> supposed performance issues where those were on.

CONFIG_SLUB_DEBUG is not enabling debugging. It just includes the code to
do so at kernel bootup. Not a performance problem. CONFIG_SLUB_DEBUG_ON is
a performance issue since debugging will be on by default.

CONFIG_SLAB_DEBUG is also a performance issue since this option makes slab
run with debugging.

--
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/