linux-kernel - Re: [PATCH] x86_64: fix dma_alloc

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Message-ID: <20080219102944.GA25663@elte.hu>
Date:	Tue, 19 Feb 2008 11:29:44 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <Yinghai.Lu@....COM>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86_64: fix dma_alloc_pages


* Yinghai Lu <Yinghai.Lu@....COM> wrote:

> one system with two nodes and two ht links on every node. the bios 
> already have _pxm for two links.
> 
> when no ram installed for node1 will have panic.
> 
> reason: the device on second chain will get node = 1 from 
> dev_to_node...via pci_acpi_scan_root. but node1 doesn't have ram 
> installed. in dma_alloc_pages it will pass check with 
> first_node(node_online_map)... and will have problem with 
> __alloc_pages in alloc_pages_node.
> 
> this patch will check the if the node is online..., if not will get 
> numa_node_id to get one node with ram.

thanks, applied.

	Ingo
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