linux-kernel - Re: How kernel applies LRU to swap out physical pages?

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

Date:	Tue, 11 Nov 2008 09:57:25 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Pan ruochen <panruochen@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: How kernel applies LRU to swap out physical pages?

On Tue, 2008-11-11 at 16:22 +0800, Pan ruochen wrote:
> Hi All,
> I'm reading the linux kernel 2.6.14. But can't understand how LRU algorithm
> is applied to page swapping. what is the 'USED' of LRU referred to? The
> reference counter which the page is mapped by processes, or the frequency that
> CPU reads/writes in the page. In common sense, the LRU algorithm will be more
> optimal for the second case. But it depends on CPU capability.
> I will be very appreciated if somebody can explain that in details.

We don't actually use LRU but something like CLOCK.
--
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/