linux-kernel - Re: [PATCH 3/7] slub: Do not use c->page on 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] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 16 Dec 2014 19:33:15 +0400
From:	Andrey Ryabinin <ryabinin.a.a@...il.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Joonsoo Kim <iamjoonsoo.kim@....com>, akpm@...uxfoundation.org,
	rostedt@...dmis.org, LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Pekka Enberg <penberg@...nel.org>,
	Jesper Dangaard Brouer <brouer@...hat.com>
Subject: Re: [PATCH 3/7] slub: Do not use c->page on free

2014-12-16 17:53 GMT+03:00 Christoph Lameter <cl@...ux.com>:
> On Tue, 16 Dec 2014, Joonsoo Kim wrote:
>
>> > Like this:
>> >
>> >         return d > 0 && d < page->objects * s->size;
>> >
>>
>> Yes! That's what I'm looking for.
>> Christoph, how about above change?
>
> Ok but now there is a multiplication in the fast path.
>

Another idea - store page's order in the lower bits of page->address.
--
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/