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Date: Tue, 19 Feb 2008 02:21:45 -0800 From: Yinghai Lu <Yinghai.Lu@....COM> To: Ingo Molnar <mingo@...e.hu> Cc: Andrew Morton <akpm@...ux-foundation.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: [PATCH] x86_64: fix dma_alloc_pages 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. Signed-off-by: Yinghai Lu <yinghai.lu@....com> diff --git a/arch/x86/kernel/pci-dma_64.c b/arch/x86/kernel/pci-dma_64.c index a82473d..931b51a 100644 --- a/arch/x86/kernel/pci-dma_64.c +++ b/arch/x86/kernel/pci-dma_64.c @@ -53,12 +53,9 @@ dma_alloc_pages(struct device *dev, gfp_t gfp, unsigned order) int node; node = dev_to_node(dev); - if (node == -1) + if (node == -1 || !node_online(node)) node = numa_node_id(); - if (node < first_node(node_online_map)) - node = first_node(node_online_map); - page = alloc_pages_node(node, gfp, order); return page ? page_address(page) : NULL; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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