Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753563Ab1DSRFa (ORCPT ); Tue, 19 Apr 2011 13:05:30 -0400 Received: from mail-vx0-f174.google.com ([209.85.220.174]:63944 "EHLO mail-vx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751994Ab1DSRF2 convert rfc822-to-8bit (ORCPT ); Tue, 19 Apr 2011 13:05:28 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=DOj43a6EFvgJ3Uyt3VH+0ve0jnEd5zodeKnpGURTUfTNcseCWCzaOQ6MpG9Pn4wAnJ jHI4NUnDQOxPMhsNTegofGJT9REFvjDNBLqVYlVBTPSShpEFHaJuRHu12uoHVjZ2DGdZ jtqb8h2yI1YNaD0vWA9plGSBkqPwDlOJNlYQY= MIME-Version: 1.0 In-Reply-To: <1303228009.3171.18.camel@mulgrave.site> References: <20110415135144.GE8828@tiehlicka.suse.cz> <20110418100131.GD8925@tiehlicka.suse.cz> <20110418135637.5baac204.akpm@linux-foundation.org> <20110419111004.GE21689@tiehlicka.suse.cz> <1303228009.3171.18.camel@mulgrave.site> Date: Tue, 19 Apr 2011 20:05:27 +0300 X-Google-Sender-Auth: GA6HwfTy1VhcELrssSPHa6oMhCg Message-ID: Subject: Re: [PATCH v3] mm: make expand_downwards symmetrical to expand_upwards From: Pekka Enberg To: James Bottomley Cc: Michal Hocko , Andrew Morton , Hugh Dickins , linux-mm@kvack.org, LKML , linux-parisc@vger.kernel.org, Christoph Lameter , David Rientjes Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5535 Lines: 98 On Tue, Apr 19, 2011 at 6:46 PM, James Bottomley wrote: > It compiles OK, but crashes on boot in fsck. ?The crash is definitely mm > but looks to be a slab problem (it's a null deref on a spinlock in > add_partial(), which seems unrelated to this patch). > > [ ? 15.628000] sd 1:0:2:0: [sdc] Attached SCSI disk > done. > [ ? 16.632000] EXT3-fs: barriers not enabled > [ ? 16.640000] kjournald starting. ?Commit interval 5 seconds > [ ? 16.640000] EXT3-fs (sda3): mounted filesystem with ordered data mode > Begin: Running /scripts/local-bottom ... done. > done. > Begin: Running /scripts/init-bottom ... done. > INIT: version 2.88 booting > Setting hostname to 'ion'...done. > Starting the hotplug events dispatcher: udevd[ ? 22.008000] udev[211]: starting version 164 > . > Synthesizing the initial hotplug events...done. > Waiting for /dev to be fully populated...done. > Activating swap:swapon on /dev/sda2 > swapon: /dev/sda2: found swap signature: version 1, page-size 4, same byte order > swapon: /dev/sda2: pagesize=4096, swapsize=1028157440, devsize=1028160000 > [ ? 28.780000] Adding 1004056k swap on /dev/sda2. ?Priority:-1 extents:1 across:1004056k > . > Will now check root file system:fsck from util-linux-ng 2.17.2 > [/sbin/fsck.ext3 (1) -- /] fsck.ext3 -a -C0 /dev/sda3 > /dev/sda3 has been mounted 37 times without being checked, check forced. > [ ?257.192000] Backtrace:=========== ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?\ 42.8% > [ ?257.192000] ?[<0000000040214f78>] add_partial+0x28/0x98 > [ ?257.192000] ?[<0000000040217ff8>] __slab_free+0x1d0/0x1d8 > [ ?257.192000] ?[<000000004021825c>] kmem_cache_free+0xc4/0x128 > [ ?257.192000] ?[<00000000401fd1a4>] remove_vma+0x8c/0xc0 > [ ?257.192000] ?[<00000000401fd3a8>] exit_mmap+0x1d0/0x220 > [ ?257.192000] ?[<0000000040156514>] mmput+0xd4/0x200 > [ ?257.192000] ?[<000000004015c7b8>] exit_mm+0x100/0x2c0 > [ ?257.192000] ?[<000000004015ef40>] do_exit+0x778/0x9d8 > [ ?257.192000] ?[<000000004015f1ec>] do_group_exit+0x4c/0xe0 > [ ?257.192000] ?[<000000004015f298>] sys_exit_group+0x18/0x28 > [ ?257.192000] ?[<0000000040106034>] syscall_exit+0x0/0x14 > [ ?257.192000] > [ ?257.192000] > [ ?257.192000] Kernel Fault: Code=26 regs=00000040bf1807d0 (Addr=0000000000000000) > [ ?257.192000] > [ ?257.192000] ? ? ?YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI > [ ?257.192000] PSW: 00001000000001001111000000001110 Not tainted > [ ?257.192000] r00-03 ?000000ff0804f00e 0000000040769e40 0000000040214f78 0000000000000000 > [ ?257.192000] r04-07 ?0000000040746e40 0000000000000001 0000004080ded370 0000000000000001 > [ ?257.192000] r08-11 ?0000000040654150 0000000000000000 0000000000000001 0000000000000001 > [ ?257.192000] r12-15 ?0000000000000000 00000000ffffffff 0000000000000024 0000000000000000 > [ ?257.192000] r16-19 ?00000000fb4ead9c 00000000fb4eac54 0000000000000000 0000000000000000 > [ ?257.192000] r20-23 ?000000000800000e 0000000000000001 000000007bbb7180 00000000401fd1a4 > [ ?257.192000] r24-27 ?0000000000000001 0000004080ded370 0000000000000000 0000000040746e40 > [ ?257.192000] r28-31 ?000000007ec0a908 00000040bf1807a0 00000040bf1807d0 0000000000000016 > [ ?257.192000] sr00-03 ?00000000002d9000 0000000000000000 0000000000000000 00000000002d9000 > [ ?257.192000] sr04-07 ?0000000000000000 0000000000000000 0000000000000000 0000000000000000 > [ ?257.192000] > [ ?257.192000] IASQ: 0000000000000000 0000000000000000 IAOQ: 000000004011bbc0 000000004011bbc4 > [ ?257.192000] ?IIR: 0f4015dc ? ?ISR: 0000000000000000 ?IOR: 0000000000000000 > [ ?257.192000] ?CPU: ? ? ? ?0 ? CR30: 00000040bf180000 CR31: fffffff0f0e098e0 > [ ?257.192000] ?ORIG_R28: 0000000040769e40 > [ ?257.192000] ?IAOQ[0]: _raw_spin_lock+0x0/0x20 > [ ?257.192000] ?IAOQ[1]: _raw_spin_lock+0x4/0x20 > [ ?257.192000] ?RP(r2): add_partial+0x28/0x98 > [ ?257.192000] Backtrace: > [ ?257.192000] ?[<0000000040214f78>] add_partial+0x28/0x98 > [ ?257.192000] ?[<0000000040217ff8>] __slab_free+0x1d0/0x1d8 > [ ?257.192000] ?[<000000004021825c>] kmem_cache_free+0xc4/0x128 > [ ?257.192000] ?[<00000000401fd1a4>] remove_vma+0x8c/0xc0 > [ ?257.192000] ?[<00000000401fd3a8>] exit_mmap+0x1d0/0x220 > [ ?257.192000] ?[<0000000040156514>] mmput+0xd4/0x200 > [ ?257.192000] ?[<000000004015c7b8>] exit_mm+0x100/0x2c0 > [ ?257.192000] ?[<000000004015ef40>] do_exit+0x778/0x9d8 > [ ?257.192000] ?[<000000004015f1ec>] do_group_exit+0x4c/0xe0 > [ ?257.192000] ?[<000000004015f298>] sys_exit_group+0x18/0x28 > [ ?257.192000] ?[<0000000040106034>] syscall_exit+0x0/0x14 > [ ?257.192000] > [ ?257.192000] Kernel panic - not syncing: Kernel Fault > [ ?257.192000] Backtrace: > [ ?257.192000] ?[<000000004011f984>] show_stack+0x14/0x20 > [ ?257.192000] ?[<000000004011f9a8>] dump_stack+0x18/0x28 > [ ?257.192000] ?[<000000004015946c>] panic+0xd4/0x368 > [ ?257.192000] ?[<0000000040120024>] parisc_terminate+0x14c/0x170 > [ ?257.192000] ?[<000000004012059c>] handle_interruption+0x2ac/0x8f8 > [ ?257.192000] ?[<000000004011bbc0>] _raw_spin_lock+0x0/0x20 > [ ?257.192000] > [ ?257.192000] Rebooting in 5 seconds.. > > It seems to be a random intermittent mm crash because the next reboot > crashed with the same trace but after the fsck had completed and the > third came up to the login prompt. Looks like a genuine SLUB problem on parisc. Christoph? -- 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/