From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d03relay04.boulder.ibm.com (d03relay04.boulder.ibm.com [9.17.195.106]) by e31.co.us.ibm.com (8.12.10/8.12.9) with ESMTP id j6SIPPIY537234 for ; Thu, 28 Jul 2005 14:25:25 -0400 Received: from d03av03.boulder.ibm.com (d03av03.boulder.ibm.com [9.17.195.169]) by d03relay04.boulder.ibm.com (8.12.10/NCO/VERS6.7) with ESMTP id j6SIPSb4168302 for ; Thu, 28 Jul 2005 12:25:28 -0600 Received: from d03av03.boulder.ibm.com (loopback [127.0.0.1]) by d03av03.boulder.ibm.com (8.12.11/8.13.3) with ESMTP id j6SIPOYU003920 for ; Thu, 28 Jul 2005 12:25:24 -0600 Subject: Re: [patch] mm: Ensure proper alignment for node_remap_start_pfn From: Dave Hansen In-Reply-To: <20050728181421.GA3842@localhost.localdomain> References: <20050728004241.GA16073@localhost.localdomain> <20050727181724.36bd28ed.akpm@osdl.org> <20050728013134.GB23923@localhost.localdomain> <1122571226.23386.44.camel@localhost> <20050728181421.GA3842@localhost.localdomain> Content-Type: text/plain Date: Thu, 28 Jul 2005 11:25:22 -0700 Message-Id: <1122575122.20800.32.camel@localhost> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Ravikiran G Thirumalai Cc: Andrew Morton , Linux Kernel Mailing List , linux-mm , shai@scalex86.org List-ID: On Thu, 2005-07-28 at 11:14 -0700, Ravikiran G Thirumalai wrote: > SRAT need not guarantee any alignment at all in the memory affinity > structure (the address in 64-bit byte address) The Summit machines (the only x86 user of the SRAT) have other hardware guarantees about alignment, so I guess that's why we've never encountered it. Are you using the SRAT on non-Summit hardware? That doesn't seem possible: arch/i386/Kconfig: config ACPI_SRAT bool default y depends on NUMA && (X86_SUMMIT || X86_GENERICARCH) > And yes, there are x86-numa > machines that run the latest kernel tree and face this problem. I didn't say "run the latest kernel tree". *In* the latest kernel tree :) -- Dave -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org