Messages in this thread | | | From | Haar János <> | Subject | Re: swapper: page allocation failure. | Date | Sun, 21 May 2006 12:42:02 +0200 |
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----- Original Message ----- From: "Chris Wedgwood" <cw@f00f.org> To: "Haar J?nos" <djani22@netcenter.hu> Cc: <linux-kernel@vger.kernel.org> Sent: Sunday, May 21, 2006 12:24 PM Subject: Re: swapper: page allocation failure.
> On Sun, May 21, 2006 at 11:31:12AM +0200, Haar J?nos wrote: > > > 1. why don't use highmem for caching? > > 2. why can not allocate enough lowmem from shared-buffer for the e1000 > > driver if it needs some memory? > > highmem can't be used as freely as lowmem, it has additional > complexity and a slight over head that makes it hard or impossible to > use in many places
OK, i understand this, but buffer-cache is an optional thing, and looks like really simple (for me), and i cannot understand why cannot use exactly for buffering the highmem...
On my concentrator the nbd-client uses ~ 3.5GB of ram for PAGE-cache. The buffer cache why can not use the highmem? Whats the difference?
Cheers, Janos
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