Re: [PATCH] Fix find_next_best_node (Re: [BUG] 2.6.23-rc3-mm1 Kernel panic - not syncing: DMA: Memory would be corrupted)
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- To: Mel Gorman <mel@xxxxxxxxx>
- Subject: Re: [PATCH] Fix find_next_best_node (Re: [BUG] 2.6.23-rc3-mm1 Kernel panic - not syncing: DMA: Memory would be corrupted)
- From: Lee Schermerhorn <Lee.Schermerhorn@xxxxxx>
- Date: Fri, 24 Aug 2007 11:49:31 -0400
- Cc: Yasunori Goto <y-goto@xxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Kamalesh Babulal <kamalesh@xxxxxxxxxxxxxxxxxx>, "Luck, Tony" <tony.luck@xxxxxxxxx>, Jeremy Higdon <jeremy@xxxxxxx>, Andi Kleen <ak@xxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx, Christoph Lameter <clameter@xxxxxxx>, linux-mm@xxxxxxxxx
- In-reply-to: <20070824145233.GA26374@xxxxxxxxx>
- Organization: HP/OSLO
- References: <617E1C2C70743745A92448908E030B2A023EB020@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> <20070823142133.9359a1ce.akpm@xxxxxxxxxxxxxxxxxxxx> <20070824153945.3C75.Y-GOTO@xxxxxxxxxxxxxx> <20070824145233.GA26374@xxxxxxxxx>
On Fri, 2007-08-24 at 15:52 +0100, Mel Gorman wrote:
> On (24/08/07 15:53), Yasunori Goto didst pronounce:
> >
> > I found find_next_best_node() was wrong.
> > I confirmed boot up by the following patch.
> > Mel-san, Kamalesh-san, could you try this?
> >
>
> This boots the IA-64 successful and gets rid of that DMA corrupts
> memory message. As a bonus, it fixes up the memoryless nodes (the bug
> where Total pages == 0 and there is a BUG in page_alloc.c) by building
> zonelists properly. The machine still fails to boot with the more familiar
> net/core/skbuff.c:95 but that is a separate problem.
>
> Well spotted Yasunori-san.
>
> Andrew, this fixes a real problem and should be considered a fix to
> memoryless-nodes-fixup-uses-of-node_online_map-in-generic-code.patch unless
> Christoph Lameter objects.
I reworked that patch and posted the update on 16aug which does not have
this problem:
http://marc.info/?l=linux-mm&m=118729871101418&w=4
This should replace
memoryless-nodes-fixup-uses-of-node_online_map-in-generic-code.patch
in -mm.
Lee
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