From: William Lee Irwin III <wli@holomorphy.com>
To: Andrea Arcangeli <andrea@suse.de>
Cc: Dave Hansen <haveblue@us.ibm.com>, linux-kernel@vger.kernel.org
Subject: Re: RFC: CONFIG_PAGE_SHIFT (aka software PAGE_SIZE)
Date: Wed, 25 Jul 2007 10:56:06 -0700 [thread overview]
Message-ID: <20070725175606.GP11781@holomorphy.com> (raw)
In-Reply-To: <20070725143904.GI19559@v2.random>
On Wed, Jul 25, 2007 at 04:39:04PM +0200, Andrea Arcangeli wrote:
> For the kernel stack btw, when alloc_pages(order=1) fails vmalloc
> should be used and 4k stacks can be dropped. Nobody does dma from the
> stack anymore these days IIRC (it doesn't work in all archs anyway).
I have recent code for that circulating, albeit intended for debugging
purposes. There's nothing particularly debug-oriented about it, though,
apart from the fact a guard page is automatically set up by vmalloc()
and that the use of vmalloc() is unconditional.
As for the rest, I'm sure there could be a lively conversation, but
consensus, so I'll let it go.
-- wli
next prev parent reply other threads:[~2007-07-25 17:54 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-06 22:26 RFC: CONFIG_PAGE_SHIFT (aka software PAGE_SIZE) Andrea Arcangeli
2007-07-06 23:33 ` Dave Hansen
2007-07-06 23:52 ` Andrea Arcangeli
2007-07-17 17:47 ` William Lee Irwin III
2007-07-17 19:33 ` Andrea Arcangeli
2007-07-18 13:32 ` William Lee Irwin III
2007-07-18 16:34 ` Rene Herman
2007-07-18 23:50 ` Andrea Arcangeli
2007-07-19 0:53 ` Rene Herman
2007-07-24 19:44 ` Andrea Arcangeli
2007-07-25 3:20 ` William Lee Irwin III
2007-07-25 14:39 ` Andrea Arcangeli
2007-07-25 17:56 ` William Lee Irwin III [this message]
2007-07-07 1:36 ` Badari Pulavarty
2007-07-07 1:47 ` Badari Pulavarty
2007-07-07 10:12 ` Andrea Arcangeli
2007-07-07 7:01 ` Paul Mackerras
2007-07-07 10:25 ` Andrea Arcangeli
2007-07-07 18:53 ` Jan Engelhardt
2007-07-07 20:34 ` Rik van Riel
2007-07-08 9:52 ` Andrea Arcangeli
2007-07-08 23:20 ` David Chinner
2007-07-10 10:11 ` Andrea Arcangeli
2007-07-12 0:12 ` David Chinner
2007-07-12 11:14 ` Andrea Arcangeli
2007-07-12 14:44 ` David Chinner
2007-07-12 16:31 ` Andrea Arcangeli
2007-07-12 16:34 ` Dave Hansen
2007-07-13 7:13 ` David Chinner
2007-07-13 14:08 ` Dave Kleikamp
2007-07-13 14:31 ` Andrea Arcangeli
2007-07-16 0:27 ` David Chinner
2007-07-12 17:53 ` Matt Mackall
2007-07-13 1:06 ` Andrea Arcangeli
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