linux-kernel - Re: userspace pagecache management tool

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Message-ID: <45EDE0B5.4060907@redhat.com>
Date:	Tue, 06 Mar 2007 16:44:21 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Pádraig Brady <P@...igBrady.com>,
	bert hubert <bert.hubert@...herlabs.nl>,
	linux-kernel@...r.kernel.org
Subject: Re: userspace pagecache management tool

Andrew Morton wrote:
> On Tue, 06 Mar 2007 12:10:49 +0000
> P__draig Brady <P@...igBrady.com> wrote:
>> Andrew Morton wrote:

>> If I'm the target
>> audience for that API then it's broken as I'd mess it up,
>> or would take too long to get it right.
>>
>> Can't we just fix the posix_fadvise() implementation to
>> only evict pages paged in by the current process.
> 
> The kernel doesn't have that information.

It doesn't _keep_ the information.  File readahead is done
in the process context, so we had it originally.

I agree though that we probably should not bother trying
to keep that kind of information :)

-- 
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