linux-kernel - Re: [PATCH 07/16] slab: overloading the RCU head over the LRU for RCU free

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] [day] [month] [year] [list]

Message-ID: <00000141128c2585-743bf539-ce6f-45ef-a68e-3b4547a2af07-000000@email.amazonses.com>
Date:	Thu, 12 Sep 2013 14:21:17 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>
cc:	Pekka Enberg <penberg@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/16] slab: overloading the RCU head over the LRU for
 RCU free

On Thu, 12 Sep 2013, Joonsoo Kim wrote:

> On Wed, Sep 11, 2013 at 02:39:22PM +0000, Christoph Lameter wrote:
> > On Thu, 22 Aug 2013, Joonsoo Kim wrote:
> >
> > > With build-time size checking, we can overload the RCU head over the LRU
> > > of struct page to free pages of a slab in rcu context. This really help to
> > > implement to overload the struct slab over the struct page and this
> > > eventually reduce memory usage and cache footprint of the SLAB.
> >
> > Looks fine to me. Can you add the rcu_head to the struct page union? This
> > kind of overload is used frequently elsewhere as well. Then cleanup other
> > cases of such uses (such as in SLUB).
>
> Okay. But I will implement it seprately because I don't know where the cases
> are now and some inverstigation would be needed.

Do it just for this case. The others can be done later.

--
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/