linux-kernel - Re: + page-owner-tracking.patch added to -mm tree

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: <49D61F09.2080808@cs.helsinki.fi>
Date:	Fri, 03 Apr 2009 17:36:57 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>,
	Mel Gorman <mel@....ul.ie>, Jason Baron <jbaron@...hat.com>,
	linux-kernel@...r.kernel.org, mm-commits@...r.kernel.org,
	alexn@....su.se, akpm@...ux-foundation.org, alexn@...ia.com,
	apw@...dowen.org, cl@...ux-foundation.org, haveblue@...ibm.com,
	kamezawa.hiroyu@...fujitu.com,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Steven Rostedt <rostedt@...dmis.org>,
	"Fr?d?ric Weisbecker" <fweisbec@...il.com>
Subject: Re: + page-owner-tracking.patch added to -mm tree

Ingo Molnar wrote:
> * Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro> wrote:
> 
>> One thing I'm not sure about this patch is whether it manages to 
>> record an allocation only once, i.e. does it log a single event 
>> when/if the slab allocator requests pages? Some time ago I sent a 
>> patch adding GFP_NOTRACE to gfp.h, but was rejected. Maybe this 
>> could be a way out of the mess.
>>
>> (GFP_NOTRACE would also allow us to log "backend" allocations 
>> easily and treat them separately, for the record, or simply filter 
>> them out.)
> 
> makes a lot of sense IMO to annotate these via a GFP flag.

Yup, make sense. I think I rejected the patch (did I?) because I wanted 
to fix the slub/slab mess differently but here it makes perfect sense.

			Pekka
--
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/