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From: Paul Mackerras <paulus@samba.org>
To: "Pekka Enberg" <penberg@cs.helsinki.fi>
Cc: "FUJITA Tomonori" <fujita.tomonori@lab.ntt.co.jp>,
	linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
	akpm@linux-foundation.org
Subject: Re: [PATCH -mm] clean up duplicated alloc/free_thread_info
Date: Tue, 3 Jun 2008 16:42:25 +1000	[thread overview]
Message-ID: <18500.59345.230174.727316@cargo.ozlabs.ibm.com> (raw)
In-Reply-To: <84144f020806022306h236a48cbv32b82cfa83fe4ee6@mail.gmail.com>

Pekka Enberg writes:

> Yeah, I too have wondered why some architectures use kmalloc() whereas
> others use the page allocator. Is THREAD_SIZE significantly smaller
> than PAGE_SIZE for those?

64-bit powerpc uses 16k kernel stacks and either 4k or 64k page size.
If the page size is 64k then we don't want to allocate a whole page
for a kernel stack.

Paul.

  reply	other threads:[~2008-06-03  6:54 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-06-03  5:02 FUJITA Tomonori
2008-06-03  6:06 ` Pekka Enberg
2008-06-03  6:42   ` Paul Mackerras [this message]
2008-06-03 22:58     ` FUJITA Tomonori
2008-06-03  8:22 ` Russell King
2008-06-03  9:14 ` David Howells
2008-06-03 22:58   ` FUJITA Tomonori
2008-06-03 10:31 ` Haavard Skinnemoen
2008-06-03 22:58   ` FUJITA Tomonori
2008-06-04  8:46     ` Haavard Skinnemoen

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