Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753623Ab0DUJwG (ORCPT ); Wed, 21 Apr 2010 05:52:06 -0400 Received: from fgwmail7.fujitsu.co.jp ([192.51.44.37]:57505 "EHLO fgwmail7.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751387Ab0DUJwE (ORCPT ); Wed, 21 Apr 2010 05:52:04 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 Date: Wed, 21 Apr 2010 18:48:06 +0900 From: KAMEZAWA Hiroyuki To: KAMEZAWA Hiroyuki Cc: Mel Gorman , linux-kernel@vger.kernel.org, akpm@linux-foundation.org, "linux-mm@kvack.org" , "minchan.kim@gmail.com" , "kosaki.motohiro@jp.fujitsu.com" Subject: Re: error at compaction (Re: mmotm 2010-04-15-14-42 uploaded Message-Id: <20100421184806.2c3ecc87.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20100421172838.0377e0cc.kamezawa.hiroyu@jp.fujitsu.com> References: <201004152210.o3FMA7KV001909@imap1.linux-foundation.org> <20100419190133.50a13021.kamezawa.hiroyu@jp.fujitsu.com> <20100419181442.GA19264@csn.ul.ie> <20100419193919.GB19264@csn.ul.ie> <20100421172838.0377e0cc.kamezawa.hiroyu@jp.fujitsu.com> Organization: FUJITSU Co. LTD. X-Mailer: Sylpheed 3.0.2 (GTK+ 2.10.14; i686-pc-mingw32) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5842 Lines: 107 On Wed, 21 Apr 2010 17:28:38 +0900 KAMEZAWA Hiroyuki wrote: > On Mon, 19 Apr 2010 20:39:19 +0100 > Mel Gorman wrote: > > > On Mon, Apr 19, 2010 at 07:14:42PM +0100, Mel Gorman wrote: > > ==== CUT HERE ==== > > mm,compaction: Map free pages in the address space after they get split for compaction > > > > split_free_page() is a helper function which takes a free page from the > > buddy lists and splits it into order-0 pages. It is used by memory > > compaction to build a list of destination pages. If > > CONFIG_DEBUG_PAGEALLOC is set, a kernel paging request bug is triggered > > because split_free_page() did not call the arch-allocation hooks or map > > the page into the kernel address space. > > > > This patch does not update split_free_page() as it is called with > > interrupts held. Instead it documents that callers of split_free_page() > > are responsible for calling the arch hooks and to map the page and fixes > > compaction. > > > > This is a fix to the patch mm-compaction-memory-compaction-core.patch. > > > > Signed-off-by: Mel Gorman > > Sorry, I think I hit another? error again. (sorry, no log.) > What I did was... > Running 2 shells. > while true; do make -j 16;make cleanl;done > and > while true; do echo 0 > /proc/sys/vm/compact_memory;done > > > Using the same config. > > Apr 21 17:27:47 localhost kernel: ------------[ cut here ]------------ > Apr 21 17:27:47 localhost kernel: kernel BUG at include/linux/swapops.h:105! > Apr 21 17:27:47 localhost kernel: invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC > Apr 21 17:27:47 localhost kernel: last sysfs file: /sys/devices/virtual/net/br0/statistics/collisions > Apr 21 17:27:47 localhost kernel: CPU 3 > Apr 21 17:27:47 localhost kernel: Modules linked in: fuse sit tunnel4 ipt_MASQUERADE iptable_nat nf_nat bridge stp llc sunrpc cpufreq_ondemand acpi_cpufreq freq_table mperf xt_physdev ip6t_REJECT nf_conntrack_ipv6 ip6table_filter ip6_tables ipv6 dm_multipath uinput ioatdma ppdev parport_pc i5000_edac bnx2 iTCO_wdt edac_core iTCO_vendor_support shpchp parport e1000e kvm_intel dca kvm i2c_i801 i2c_core i5k_amb pcspkr megaraid_sas [last unloaded: microcode] > Apr 21 17:27:47 localhost kernel: > Apr 21 17:27:47 localhost kernel: Pid: 27892, comm: cc1 Tainted: G W 2.6.34-rc4-mm1+ #4 D2519/PRIMERGY > Apr 21 17:27:47 localhost kernel: RIP: 0010:[] [] migration_entry_wait+0x16f/0x180 > Apr 21 17:27:47 localhost kernel: RSP: 0000:ffff88008d9efe08 EFLAGS: 00010246 > Apr 21 17:27:47 localhost kernel: RAX: ffffea0000000000 RBX: ffffea0000241100 RCX: 0000000000000001 > Apr 21 17:27:47 localhost kernel: RDX: 000000000000a4e0 RSI: ffff880621a4ab00 RDI: 000000000149c03e > Apr 21 17:27:47 localhost kernel: RBP: ffff88008d9efe38 R08: 0000000000000000 R09: 0000000000000000 > Apr 21 17:27:47 localhost kernel: R10: 0000000000000000 R11: 0000000000000001 R12: ffff880621a4aae8 > Apr 21 17:27:47 localhost kernel: R13: 00000000bf811000 R14: 000000000149c03e R15: 0000000000000000 > Apr 21 17:27:47 localhost kernel: FS: 00007fe6abc90700(0000) GS:ffff880005a00000(0000) knlGS:0000000000000000 > Apr 21 17:27:47 localhost kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > Apr 21 17:27:47 localhost kernel: CR2: 00007fe6a37279a0 CR3: 000000008d942000 CR4: 00000000000006e0 > Apr 21 17:27:47 localhost kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > Apr 21 17:27:47 localhost kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > Apr 21 17:27:47 localhost kernel: Process cc1 (pid: 27892, threadinfo ffff88008d9ee000, task ffff8800b23ec820) > Apr 21 17:27:47 localhost kernel: Stack: > Apr 21 17:27:47 localhost kernel: ffffea000101aee8 ffff880621a4aae8 ffff88008d9efe38 00007fe6a37279a0 > Apr 21 17:27:47 localhost kernel: <0> ffff8805d9706d90 ffff880621a4aa00 ffff88008d9efef8 ffffffff81126d05 > Apr 21 17:27:47 localhost kernel: <0> ffff88008d9efec8 0000000000000246 0000000000000000 ffffffff81586533 > Apr 21 17:27:47 localhost kernel: Call Trace: > Apr 21 17:27:47 localhost kernel: [] handle_mm_fault+0x995/0x9b0 > Apr 21 17:27:47 localhost kernel: [] ? do_page_fault+0x103/0x330 > Apr 21 17:27:47 localhost kernel: [] ? finish_task_switch+0x0/0xf0 > Apr 21 17:27:47 localhost kernel: [] do_page_fault+0x16e/0x330 > Apr 21 17:27:47 localhost kernel: [] page_fault+0x25/0x30 > Apr 21 17:27:47 localhost kernel: Code: 53 08 85 c9 0f 84 32 ff ff ff 8d 41 01 89 4d d8 89 45 d4 8b 75 d4 8b 45 d8 f0 0f b1 32 89 45 dc 8b 45 dc 39 c8 74 aa 89 c1 eb d7 <0f> 0b eb fe 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 > Apr 21 17:27:47 localhost kernel: RIP [] migration_entry_wait+0x16f/0x180 > Apr 21 17:27:47 localhost kernel: RSP > Apr 21 17:27:47 localhost kernel: ---[ end trace 4860ab585c1fcddb ]--- > It seems that this is a new error. static inline struct page *migration_entry_to_page(swp_entry_t entry) { struct page *p = pfn_to_page(swp_offset(entry)); /* * Any use of migration entries may only occur while the * corresponding page is locked */ BUG_ON(!PageLocked(p)); return p; } Hits this BUG_ON()....then, the page migration_entry points to is unlocked. But we always do lock_page(old_page); unamp(old_page); remap(new_page); unlock_page(old_page); So....some pte wasn't updated at remap ? Hmm. -Kame -- 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/