From: christoph <christoph@scalex86.org>
To: Dave Hansen <haveblue@us.ibm.com>
Cc: linux-mm <linux-mm@kvack.org>,
shai@scalex86.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Factor in buddy allocator alignment requirements in node memory alignment
Date: Mon, 16 May 2005 12:55:39 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.62.0505161253090.20839@ScMPusgw> (raw)
In-Reply-To: <1116276439.1005.110.camel@localhost>
On Mon, 16 May 2005, Dave Hansen wrote:
> > Because the buddy allocator is complaining about wrongly allocated zones!
>
> Just because it complains doesn't mean that anything is actually
> wrong :)
>
> Do you know which pieces of code actually break if the alignment doesn't
> meet what that warning says?
I have seen nothing break but 4 MB allocations f.e. will not be allocated
on a 4MB boundary with a 2 MB zone alignment. The page allocator always
returnes properly aligned pages but 4MB allocations are an exception?
Some present or future hardware device or some other code may find that
surprising and crash.
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next prev parent reply other threads:[~2005-05-16 19:55 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-16 19:05 christoph
2005-05-16 20:14 ` Dave Hansen
2005-05-16 19:43 ` christoph
2005-05-16 20:47 ` Dave Hansen
2005-05-16 19:55 ` christoph [this message]
2005-05-16 20:56 ` Dave Hansen
2005-05-16 20:12 ` christoph
2005-05-16 21:06 ` Martin J. Bligh
2005-05-17 13:12 ` Andrea Arcangeli
2005-05-17 14:16 ` Andy Whitcroft
2005-05-16 20:51 ` Martin J. Bligh
2005-05-17 12:25 ` Andy Whitcroft
2005-05-17 17:19 ` christoph
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