From: Jeff Dike <jdike@addtoit.com>
To: BlaisorBlade <blaisorblade_spam@yahoo.it>
Cc: user-mode-linux-devel@lists.sourceforge.net
Subject: Re: [uml-devel] Swapping directly to host swap area?
Date: Thu, 12 Feb 2004 16:36:20 -0500 [thread overview]
Message-ID: <20040212213620.GA4168@ccure.user-mode-linux.org> (raw)
In-Reply-To: <200402122008.22995.blaisorblade_spam@yahoo.it>
On Thu, Feb 12, 2004 at 08:08:22PM +0100, BlaisorBlade wrote:
> It seems to me that the access statistics should be the same ones: I do not
> know thoroughly the way pages are marked as active or swappable (I can check
> in the 2.4 VM description - ask for the address) but if that depends on page
> faulting, then, it seems to me that since guest page fault are even host page
> fault (the UML handling of SIGSEGV is like the host handling of CPU fault
> exceptions, right?) the statistics should be the same.
No, they're not the same. If a page is swapped out by the host, and then
swapped back in, that will count as a page fault on the host, but not inside
the UML.
Jeff
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next prev parent reply other threads:[~2004-02-12 21:10 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-25 23:34 [uml-devel] Swapping directly to host swap area? William Stearns
2004-01-27 3:01 ` Dan Shearer
2004-01-28 4:39 ` Jeff Dike
2004-01-28 14:01 ` [uml-devel] O_DIRECT (was: Swapping directly to host swap area?) Goetz Bock
2004-01-30 17:27 ` Jeff Dike
2004-02-05 16:59 ` [uml-devel] Swapping directly to host swap area? BlaisorBlade
2004-02-11 0:43 ` Jeff Dike
2004-02-12 19:08 ` BlaisorBlade
2004-02-12 21:36 ` Jeff Dike [this message]
2004-03-19 5:51 ` William Stearns
2004-03-19 16:58 ` Matt Ayres
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