linux-kernel - Re: [PATCH] mm: don't invoke __alloc_pages_direct

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:	Sun, 8 Jul 2012 11:33:14 +0900
From:	JoonSoo Kim <js1304@...il.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	akpm@...ux-foundation.org, Pekka Enberg <penberg@...nel.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] mm: don't invoke __alloc_pages_direct_compact when order 0

2012/7/7 David Rientjes <rientjes@...gle.com>:
> On Sat, 7 Jul 2012, Joonsoo Kim wrote:
>
>> __alloc_pages_direct_compact has many arguments so invoking it is very costly.
>> And in almost invoking case, order is 0, so return immediately.
>>
>
> If "zero cost" is "very costly", then this might make sense.
>
> __alloc_pages_direct_compact() is inlined by gcc.

In my kernel image, __alloc_pages_direct_compact() is not inlined by gcc.
So I send this patch.
But, currently I think it is not useful, so drop it.

Thanks for comments.
--
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/