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

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

[kautuk.c @samsung.com]

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

[KAMEZAWA Hiroyuki]

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