From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with ESMTP id AC69C8D003B for ; Tue, 19 Apr 2011 13:05:29 -0400 (EDT) Received: by vxk20 with SMTP id 20so6925014vxk.14 for ; Tue, 19 Apr 2011 10:05:27 -0700 (PDT) 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 Message-ID: Subject: Re: [PATCH v3] mm: make expand_downwards symmetrical to expand_upwards From: Pekka Enberg Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org List-ID: To: James Bottomley Cc: Michal Hocko , Andrew Morton , Hugh Dickins , linux-mm@kvack.org, LKML , linux-parisc@vger.kernel.org, Christoph Lameter , David Rientjes On Tue, Apr 19, 2011 at 6:46 PM, James Bottomley wrote: > It compiles OK, but crashes on boot in fsck. =A0The crash is definitely m= m > but looks to be a slab problem (it's a null deref on a spinlock in > add_partial(), which seems unrelated to this patch). > > [ =A0 15.628000] sd 1:0:2:0: [sdc] Attached SCSI disk > done. > [ =A0 16.632000] EXT3-fs: barriers not enabled > [ =A0 16.640000] kjournald starting. =A0Commit interval 5 seconds > [ =A0 16.640000] EXT3-fs (sda3): mounted filesystem with ordered data mod= e > 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[ =A0 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 byt= e order > swapon: /dev/sda2: pagesize=3D4096, swapsize=3D1028157440, devsize=3D1028= 160000 > [ =A0 28.780000] Adding 1004056k swap on /dev/sda2. =A0Priority:-1 extent= s: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. > [ =A0257.192000] Backtrace:=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0\ 42.8% > [ =A0257.192000] =A0[<0000000040214f78>] add_partial+0x28/0x98 > [ =A0257.192000] =A0[<0000000040217ff8>] __slab_free+0x1d0/0x1d8 > [ =A0257.192000] =A0[<000000004021825c>] kmem_cache_free+0xc4/0x128 > [ =A0257.192000] =A0[<00000000401fd1a4>] remove_vma+0x8c/0xc0 > [ =A0257.192000] =A0[<00000000401fd3a8>] exit_mmap+0x1d0/0x220 > [ =A0257.192000] =A0[<0000000040156514>] mmput+0xd4/0x200 > [ =A0257.192000] =A0[<000000004015c7b8>] exit_mm+0x100/0x2c0 > [ =A0257.192000] =A0[<000000004015ef40>] do_exit+0x778/0x9d8 > [ =A0257.192000] =A0[<000000004015f1ec>] do_group_exit+0x4c/0xe0 > [ =A0257.192000] =A0[<000000004015f298>] sys_exit_group+0x18/0x28 > [ =A0257.192000] =A0[<0000000040106034>] syscall_exit+0x0/0x14 > [ =A0257.192000] > [ =A0257.192000] > [ =A0257.192000] Kernel Fault: Code=3D26 regs=3D00000040bf1807d0 (Addr=3D= 0000000000000000) > [ =A0257.192000] > [ =A0257.192000] =A0 =A0 =A0YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI > [ =A0257.192000] PSW: 00001000000001001111000000001110 Not tainted > [ =A0257.192000] r00-03 =A0000000ff0804f00e 0000000040769e40 000000004021= 4f78 0000000000000000 > [ =A0257.192000] r04-07 =A00000000040746e40 0000000000000001 0000004080de= d370 0000000000000001 > [ =A0257.192000] r08-11 =A00000000040654150 0000000000000000 000000000000= 0001 0000000000000001 > [ =A0257.192000] r12-15 =A00000000000000000 00000000ffffffff 000000000000= 0024 0000000000000000 > [ =A0257.192000] r16-19 =A000000000fb4ead9c 00000000fb4eac54 000000000000= 0000 0000000000000000 > [ =A0257.192000] r20-23 =A0000000000800000e 0000000000000001 000000007bbb= 7180 00000000401fd1a4 > [ =A0257.192000] r24-27 =A00000000000000001 0000004080ded370 000000000000= 0000 0000000040746e40 > [ =A0257.192000] r28-31 =A0000000007ec0a908 00000040bf1807a0 00000040bf18= 07d0 0000000000000016 > [ =A0257.192000] sr00-03 =A000000000002d9000 0000000000000000 00000000000= 00000 00000000002d9000 > [ =A0257.192000] sr04-07 =A00000000000000000 0000000000000000 00000000000= 00000 0000000000000000 > [ =A0257.192000] > [ =A0257.192000] IASQ: 0000000000000000 0000000000000000 IAOQ: 0000000040= 11bbc0 000000004011bbc4 > [ =A0257.192000] =A0IIR: 0f4015dc =A0 =A0ISR: 0000000000000000 =A0IOR: 00= 00000000000000 > [ =A0257.192000] =A0CPU: =A0 =A0 =A0 =A00 =A0 CR30: 00000040bf180000 CR31= : fffffff0f0e098e0 > [ =A0257.192000] =A0ORIG_R28: 0000000040769e40 > [ =A0257.192000] =A0IAOQ[0]: _raw_spin_lock+0x0/0x20 > [ =A0257.192000] =A0IAOQ[1]: _raw_spin_lock+0x4/0x20 > [ =A0257.192000] =A0RP(r2): add_partial+0x28/0x98 > [ =A0257.192000] Backtrace: > [ =A0257.192000] =A0[<0000000040214f78>] add_partial+0x28/0x98 > [ =A0257.192000] =A0[<0000000040217ff8>] __slab_free+0x1d0/0x1d8 > [ =A0257.192000] =A0[<000000004021825c>] kmem_cache_free+0xc4/0x128 > [ =A0257.192000] =A0[<00000000401fd1a4>] remove_vma+0x8c/0xc0 > [ =A0257.192000] =A0[<00000000401fd3a8>] exit_mmap+0x1d0/0x220 > [ =A0257.192000] =A0[<0000000040156514>] mmput+0xd4/0x200 > [ =A0257.192000] =A0[<000000004015c7b8>] exit_mm+0x100/0x2c0 > [ =A0257.192000] =A0[<000000004015ef40>] do_exit+0x778/0x9d8 > [ =A0257.192000] =A0[<000000004015f1ec>] do_group_exit+0x4c/0xe0 > [ =A0257.192000] =A0[<000000004015f298>] sys_exit_group+0x18/0x28 > [ =A0257.192000] =A0[<0000000040106034>] syscall_exit+0x0/0x14 > [ =A0257.192000] > [ =A0257.192000] Kernel panic - not syncing: Kernel Fault > [ =A0257.192000] Backtrace: > [ =A0257.192000] =A0[<000000004011f984>] show_stack+0x14/0x20 > [ =A0257.192000] =A0[<000000004011f9a8>] dump_stack+0x18/0x28 > [ =A0257.192000] =A0[<000000004015946c>] panic+0xd4/0x368 > [ =A0257.192000] =A0[<0000000040120024>] parisc_terminate+0x14c/0x170 > [ =A0257.192000] =A0[<000000004012059c>] handle_interruption+0x2ac/0x8f8 > [ =A0257.192000] =A0[<000000004011bbc0>] _raw_spin_lock+0x0/0x20 > [ =A0257.192000] > [ =A0257.192000] 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, 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org