Re: [RFC][PATCH 0/3] beat kswapd with the proverbial clue-bat
From: Arjan van de Ven (arjanv_at_redhat.com)
Date: 09/15/04
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Date: Wed, 15 Sep 2004 15:39:39 +0200 To: Jörn Engel <joern@wohnheim.fh-wedel.de>
On Wed, Sep 15, 2004 at 03:34:08PM +0200, Jörn Engel wrote:
> On Wed, 15 September 2004 15:29:04 +0200, Arjan van de Ven wrote:
> >
> > if you haven't pinned those pages then you have lost already.
>
> Bug reports say otherwise. Could you explain "pinning" to a newbie
> like me?
if your page is made unfreeable for the vm, for example by virtue of not
being on the LRU or having an elevated count or.. or .. then such a page is
pinned.
if your page is freeable byt he VM and your device is dmaing from/to it you
have a really bad bug
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