linux-kernel - Re: [PATCH v2 06/11] memcg: kmem controller infrastructure

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: <20120816095309.GB2817@dhcp22.suse.cz>
Date:	Thu, 16 Aug 2012 11:53:09 +0200
From:	Michal Hocko <mhocko@...e.cz>
To:	Glauber Costa <glommer@...allels.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	cgroups@...r.kernel.org, devel@...nvz.org,
	Johannes Weiner <hannes@...xchg.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	kamezawa.hiroyu@...fujitsu.com, Christoph Lameter <cl@...ux.com>,
	David Rientjes <rientjes@...gle.com>,
	Pekka Enberg <penberg@...nel.org>,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: [PATCH v2 06/11] memcg: kmem controller infrastructure

On Wed 15-08-12 18:27:45, Glauber Costa wrote:
> 
> >>
> >> I see now, you seem to be right.
> > 
> > No I am not because it seems that I am really blind these days...
> > We were doing this in mem_cgroup_do_charge for ages:
> > 	if (!(gfp_mask & __GFP_WAIT))
> >                 return CHARGE_WOULDBLOCK;
> > 
> > /me goes to hide and get with further feedback with a clean head.
> > 
> > Sorry about that.
> > 
> I am as well, since I went to look at mem_cgroup_do_charge() and missed
> that.

I thought we are not doing atomic allocations in user pages accounting
but I was obviously wrong because at least shmem uses atomic
allocations for ages.

> Do you have any other concerns specific to this patch ?

I understood you changed also handle thingy. So the patch should be
correct.
Do you plan to send an updated version?

-- 
Michal Hocko
SUSE Labs
--
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/