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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: David Gibson <david@gibson.dropbear.id.au>,
	<linuxppc-embedded@lists.linuxppc.org>
Subject: Re: consistent_alloc() revisited
Date: Sat, 20 Jul 2002 17:22:13 +0200	[thread overview]
Message-ID: <20020720152213.10662@192.168.4.1> (raw)
In-Reply-To: <20020716021313.GQ22786@zax>


>
>Arguably setting PageReserved is the Right Thing, since
>consistent_alloc() memory obviously shouldn't be swapped or paged.
>However, it's only relevant if the memory is mapped into userspace,
>and then a driver can set VM_IO on the vma to prevent this.

An other issue I had with AGP is, I think, killing the userspace
process mmap'ing some of this memory will cause the kernel to try
to free the pages if not PageReserved

Ben.


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

  parent reply	other threads:[~2002-07-20 15:22 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-07-16  2:13 consistent_alloc() revisited David Gibson
2002-07-16 14:09 ` Dan Malek
2002-07-16 14:58   ` Tom Rini
2002-07-16 15:23   ` Matt Porter
2002-07-16 15:27   ` Matt Porter
2002-07-17  1:24   ` David Gibson
2002-07-20 15:28     ` Benjamin Herrenschmidt
2002-07-21 13:26       ` David Gibson
2002-07-20 15:22 ` Benjamin Herrenschmidt [this message]
2002-07-21 13:23   ` David Gibson
  -- strict thread matches above, loose matches on Subject: below --
2002-07-16 16:14 Ralph Blach

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