linux-kernel - Re: Is there any way to stop reclamation of file cache pages ?

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Message-Id: <20110908092633.2fcc01d7.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Thu, 8 Sep 2011 09:26:33 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	"kautuk.c @samsung.com" <consul.kautuk@...il.com>
Cc:	linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
	linux-fsdev@...r.rutgers.edu, linux-kernel@...r.kernel.org
Subject: Re: Is there any way to stop reclamation of file cache pages ?

On Mon, 5 Sep 2011 14:44:43 +0530
"kautuk.c @samsung.com" <consul.kautuk@...il.com> wrote:

> Hi,
> 
> I am aware that mlocked pages can be stopped from being reclaimed
> through the PFRA.
> 
> However, is there any method to stop reclamation of the page-cache
> pages pertaining to
> a single file's inode without mlocking ?
> 
> If I want to only use the open, read and write system calls and I want
> to set specific file cache
> pages to "non-reclaimable", how can I do so ?
> 

For this kind of question, you should explain why you can't use mlock.

> Will the POSIX_FADV_WILLNEED option to the fadvise() system call solve
> this problem ?
> 

I think no.

Thanks,
-Kame

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