Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263301AbUF3XcC (ORCPT ); Wed, 30 Jun 2004 19:32:02 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263204AbUF3XcC (ORCPT ); Wed, 30 Jun 2004 19:32:02 -0400 Received: from e1.ny.us.ibm.com ([32.97.182.101]:9664 "EHLO e1.ny.us.ibm.com") by vger.kernel.org with ESMTP id S263301AbUF3Xbi (ORCPT ); Wed, 30 Jun 2004 19:31:38 -0400 Subject: Re: [Lhms-devel] new memory hotremoval patch From: Dave Hansen To: IWAMOTO Toshihiro Cc: Linux Kernel Mailing List , lhms , linux-mm In-Reply-To: <20040630111719.EBACF70A92@sv1.valinux.co.jp> References: <20040630111719.EBACF70A92@sv1.valinux.co.jp> Content-Type: text/plain Message-Id: <1088638272.5265.931.camel@nighthawk> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Wed, 30 Jun 2004 16:31:12 -0700 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2889 Lines: 97 On Wed, 2004-06-30 at 04:17, IWAMOTO Toshihiro wrote: > Hi, > > this is an updated version of my memory hotremoval patch. > I'll only include the main patch which contains page remapping code. > The other two files, which haven't changed much from April, can be > found at http://people.valinux.co.jp/~iwamoto/mh.html . I tried your code and it oopsed pretty fast: NUMA - single node, flat memory mode, but broken in several blocks Rounding down maxpfn 950265 -> 949248 node 0 start 0 node 1 start 65536 node 2 start 131072 node 3 start 196608 node 4 start 262144 node 5 start 327680 node 6 start 393216 node 7 start 458752 physnode_map 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Warning only 1920MB will be used. Use a HIGHMEM enabled kernel. 1892MB LOWMEM available. min_low_pfn = 1080, max_low_pfn = 484352, highstart_pfn = 0 Low memory ends at vaddr f6400000 node 0 will remap to vaddr f6400000 - High memory starts at vaddr 80000000 found SMP MP-table at 0009e1d0 On node 0 totalpages: 65536 DMA zone: 4096 pages, LIFO batch:1 Normal zone: 61440 pages, LIFO batch:15 HighMem zone: 0 pages, LIFO batch:1 ... Node 2 not plugged Node 5 not plugged Zone 5 not plugged Node 8 not plugged Zone 8 not plugged Node 2 not plugged Node 5 not plugged Node 8 not plugged disable 11 Unable to handle kernel NULL pointer dereference at virtual address 000003a7 printing eip: 801349b5 *pde = 00000000 Oops: 0002 [#1] SMP DEBUG_PAGEALLOC Modules linked in: CPU: 0 EIP: 0060:[<801349b5>] Not tainted EFLAGS: 00010206 (2.6.7) EIP is at mhtest_disable+0x49/0xa0 eax: 0000039f ebx: 0000001f ecx: 00000380 edx: 000000b0 esi: 00000000 edi: 80425ea0 ebp: 0000002c esp: 8c60beec ds: 007b es: 007b ss: 0068 Process sh (pid: 1842, threadinfo=8c60a000 task=8e549a70) Stack: 0000000b 0000002c 802cad39 802cad38 00000001 80134dd4 0000000b 00000000 8f9b2f64 8f9b2f88 0000000b 8c60bf28 802cacb0 0000002c 0000000b 61736964 00656c62 000a3131 0000000a 8e4fee58 00000001 8c496f64 0000000a 00000000 Call Trace: [<80134dd4>] mhtest_write+0x150/0x17d [<8015daa4>] dupfd+0x2c/0x64 [<8015dac6>] dupfd+0x4e/0x64 [<801788a3>] proc_file_write+0x27/0x34 [<8014ef0c>] vfs_write+0xa0/0xd0 [<8014efb9>] sys_write+0x31/0x4c [<80103c87>] syscall_call+0x7/0xb Code: c7 40 08 00 00 00 00 c7 40 04 00 00 00 00 89 c8 03 04 3a 83 $ addr2line -e vmlinux 801349b5 /home/dave/work/linux/2.6/2.6.7/linux-2.6.7-iwamoto/mm/page_alloc.c:2205 The script spit out some errors too: # sh rotate.sh 2: rotate.sh: line 11: [: too many arguments 5: rotate.sh: line 11: [: too many arguments 8: rotate.sh: line 11: [: too many arguments -- Dave - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/