From: Aubrey <aubreylee@gmail.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Subject: Re: Page alignment issue
Date: Thu, 28 Dec 2006 11:49:37 +0800 [thread overview]
Message-ID: <6d6a94c50612271949l66265cd4v4c63c1bdf3984417@mail.gmail.com> (raw)
In-Reply-To: <6d6a94c50612270749j77cd53a9mba6280e4129d9d5a@mail.gmail.com>
On 12/27/06, Aubrey <aubreylee@gmail.com> wrote:
> As for the buddy system, much of docs mention the physical address of
> the first page frame of a block should be a multiple of the group
> size. For example, the initial address of a 16-page-frame block should
> be 16-page aligned. I happened to encounted an issue that the physical
> addresss pf the block is not 4-page aligned(0x36c9000) while the order
> of the block is 2. I want to know what out of buddy algorithm depend
> on this feature? My problem seems to happen in
> schedule()->context_switch() call, but so far I didn't figure out the
> root cause.
It seems nothing depend on this feature. the problem you encounted is
the kernel task stack should be 2-page aligned.
-Aubrey
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next prev parent reply other threads:[~2006-12-28 3:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-27 15:49 Aubrey
2006-12-28 3:49 ` Aubrey [this message]
2006-12-31 6:02 ` Nick Piggin
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