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

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Message-ID: <CAFPAmTTaq2Lz=eGgfG2-5U0M9aS_aZLNAANAVPZj6TEo9EdjGg@mail.gmail.com>
Date:	Mon, 5 Sep 2011 14:44:43 +0530
From:	"kautuk.c @samsung.com" <consul.kautuk@...il.com>
To:	linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
	linux-fsdev@...r.rutgers.edu
Cc:	linux-kernel@...r.kernel.org
Subject: Is there any way to stop reclamation of file cache pages ?

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 ?

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

Thanks,
Kautuk.
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