linux-kernel - Re: [RFC PATCH 3/10] define page_file

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <Pine.LNX.4.64.0711071018001.9110@schroedinger.engr.sgi.com>
Date:	Wed, 7 Nov 2007 10:18:48 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Rik van Riel <riel@...hat.com>
cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [RFC PATCH 3/10] define page_file_cache

On Wed, 7 Nov 2007, Rik van Riel wrote:

> On Wed, 7 Nov 2007 10:06:10 -0800 (PST)
> Christoph Lameter <clameter@....com> wrote:
> 
> > On Wed, 7 Nov 2007, Rik van Riel wrote:
> > 
> > > How exactly can an anonymous page ever become file backed?
> > 
> > When they get assigned a swap entry.
> 
> That does not change their status.  They're still swap backed.

If they are swap backed then they have a backing store on disk. They are 
file backed in some sense.

> > > > Do ramfs pages count as memory backed?
> > > 
> > > Since ramfs pages cannot be evicted from memory at all, they
> > > should go into the "noreclaim" page set.
> > 
> > Which LRU do they go on.
> 
> With the patch set from last weekend, the file LRU.

Argh.

> With the patch set later this week, they'll be in the 
> "noreclaim" page set, which is never scanned by the VM.

That sounds better.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/