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Date: Wed, 30 Jan 2008 11:59:43 +0900 (JST) From: Minoru Usui <usui@....nes.nec.co.jp> To: mingo@...e.hu Cc: linux-kernel@...r.kernel.org, magnus.damm@...il.com Subject: Re: [PATCH] Fix NUMA emulation for x86_64 >>>>> ">" == Ingo Molnar <mingo@...e.hu> writes: >> * Minoru Usui <usui@....nes.nec.co.jp> wrote: >> I found a small bug of NUMA emulation code for x86_64. >> (CONFIG_NUMA_EMU) If machine is non-NUMA, find_node_by_addr() should >> return NUMA_NO_NODE, but current implementation code returns existent >> maximum NUMA node number + 1. This is not existent NUMA node number. >> >> However, this behaviour does not affect NUMA emulation fortunately, >> because acpi_fake_nodes() that is caller of find_node_by_addr() gets >> pxm (proximity domain) by node_to_pxm() from non-existent NUMA node >> number that was returned by find_node_by_addr(). node_to_pxm() returns >> PXM_INVAL that means illegal or non-existent NUMA node number. >> thanks, i have applied your fix to x86.git. >> It seems this does not need to be backported to v2.6.24.1 because >> node_to_pxm() masked the bad effects of this bug, right? >> Ingo I think this bug is not urgency. If you mean that it's not necessary to release 2.6.24.1 only for this bug, I think so. -- 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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