linux-kernel - Re: [RFC][PATCH 1/3] contigous big page allocator

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: <20101014160217N.fujita.tomonori@lab.ntt.co.jp>
Date:	Thu, 14 Oct 2010 16:07:12 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	andi@...stfloor.org
Cc:	kamezawa.hiroyu@...fujitsu.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, minchan.kim@...il.com
Subject: Re: [RFC][PATCH 1/3] contigous big page allocator

On Wed, 13 Oct 2010 09:01:43 +0200
Andi Kleen <andi@...stfloor.org> wrote:

> KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> writes:
> >
> > What this wants to do: 
> >   allocates a contiguous chunk of pages larger than MAX_ORDER.
> >   for device drivers (camera? etc..)
> 
> I think to really move forward you need a concrete use case
> actually implemented in tree.

As already pointed out, some embeded drivers need physcailly
contignous memory. Currenlty, they use hacky tricks (e.g. playing with
the boot memory allocators). There are several proposals for this like
adding a new kernel memory allocator (from samsung).

It's ideal if the memory allocator can handle this, I think.
--
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/