linux-kernel - Re: [PATCH 08/17] bio: reimplement bio_copy_user

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Message-ID: <49D46A8E.2090002@panasas.com>
Date:	Thu, 02 Apr 2009 10:34:38 +0300
From:	Boaz Harrosh <bharrosh@...asas.com>
To:	Tejun Heo <tj@...nel.org>
CC:	axboe@...nel.dk, linux-kernel@...r.kernel.org,
	fujita.tomonori@....ntt.co.jp
Subject: Re: [PATCH 08/17] bio: reimplement bio_copy_user_iov()

On 04/02/2009 04:38 AM, Tejun Heo wrote:
> Hello, Boaz.
> 
> Boaz Harrosh wrote:
>> Please consider that this code-path is used by me, in exofs and
>> pNFS-objcets in a very very hot path, where memory pressure is a
>> common scenario.
> 
> One quick question.  Don't the above paths map kernel pages to a
> request?
> 

Well vfs-page-cache pages. Any ideas?

> Thanks.
> 

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