linux-kernel - Re: [PATCH -mm] relayfs: support larger relay buffer

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Message-ID: <48062723.2020507@redhat.com>
Date:	Wed, 16 Apr 2008 12:19:47 -0400
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Tom Zanussi <zanussi@...cast.net>
CC:	David Wilder <dwilder@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	systemtap-ml <systemtap@...rces.redhat.com>,
	LKML <linux-kernel@...r.kernel.org>, tzanussi@...il.com
Subject: Re: [PATCH -mm] relayfs: support larger relay buffer

Hi Tom,

Tom Zanussi wrote:
> On Tue, 2008-04-15 at 11:27 -0400, Masami Hiramatsu wrote:
>> Use vmalloc() and memset() instead of kcalloc() to allocate a page* array
>> when the array size is bigger than one page. This enables relayfs to support
>> bigger relay buffers than 64MB on 4k-page system, 512MB on 16k-page system.
>>
>> Signed-off-by: Masami Hiramatsu <mhiramat@...hat.com>
>> ---
>> This is useful for a 64-bit system which has a plenty of memory (tens of
>> giga bytes) and a large kernel memory space.
>>
>> I tested it on x86-64 and ia64.
>>
> 
> Hi,
> 
> It looks ok to me, but it might be a little cleaner and avoid some
> duplication if you add the new code as a couple of functions instead.
> Just a suggestion...

Sure, that is a good idea, I'll renew my patch.
Thank you,

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America) Inc.
Software Solutions Division

e-mail: mhiramat@...hat.com

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