From mboxrd@z Thu Jan 1 00:00:00 1970 From: "F. Poncin" Subject: Re: Fw: slab error in cache_free_debugcheck(): cache `sgpool-8': Date: Mon, 20 Feb 2006 20:44:52 +0100 Message-ID: <43FA1C34.40604@chello.be> References: <20051017002339.5156d7f4.akpm@osdl.org> <4353754B.1040500@s5r6.in-berlin.de> <4353FDAD.1010204@chello.be> <43F9019C.3010505@s5r6.in-berlin.de> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from amsfep18-int.chello.nl ([213.46.243.13]:24918 "EHLO amsfep18-int.chello.nl") by vger.kernel.org with ESMTP id S932660AbWBTTo4 (ORCPT ); Mon, 20 Feb 2006 14:44:56 -0500 In-Reply-To: <43F9019C.3010505@s5r6.in-berlin.de> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Stefan Richter Cc: linux1394-devel@lists.sourceforge.net, linux-scsi@vger.kernel.org, Andrew Morton Stefan Richter wrote: > F. Poncin wrote on 2005-10-17: > >> Stefan Richter wrote: >> >>> Andrew Morton wrote: >>> >>>> THis is rather deadly. Is it likely to be a 1394 bug, or scsi? >>> >>> >>> I am not sure. >> >> >> No impact on disk access. >> >>>> Begin forwarded message: >>> >>> ... >>> >>>> Summary: slab error in cache_free_debugcheck(): cache `sgpool-8':=20 >>>> double free, or memory outside object was overwritten >>>> Kernel version: 2.6.14-rc4-g9149ccfa >>>> Steps to reproduce: on boot >>>> Hardware: Dell 8300 + External USB disk enclosures >>> > ... > >> Brand new Seagate USB/FireWire External Hard Drive -=20 >> http://www.seagate.com/products/personal/external.html >> Connected through FireWire to PCI card: FireWire (IEEE 1394): Agere=20 >> Systems (former Lucent Microelectronics) FW323 (rev 61) >> >> The older Seagate model (same size) is not affected. >> Vendor: ST340083 Model: 2A Rev: >> Type: Direct-Access-RBC ANSI SCSI revision: 04 > > ... > >>>> scsi2 : SCSI emulation for IEEE-1394 SBP-2 Devices >>>> ieee1394: sbp2: Logged into SBP-2 device >>>> ieee1394: Node 0-00:1023: Max speed [S400] - Max payload [2048] >>>> Vendor: Initio Model: ST3400832A Rev: 4.07 >>>> Type: Direct-Access ANSI SCSI revision: 00 >>>> SCSI device sdc: 781422768 512-byte hdwr sectors (400088 MB) >>>> slab error in cache_free_debugcheck(): cache `sgpool-8': double=20 >>>> free, or memory outside object was overwritten >>> > ... > >>>> c233b7a8: redzone 1: 0x170fc2a5, redzone 2: 0xc0144b47. >>>> sdc: asking for cache data failed >>>> sdc: assuming drive cache: write through >>>> SCSI device sdc: 781422768 512-byte hdwr sectors (400088 MB) >>>> slab error in cache_free_debugcheck(): cache `sgpool-8': double=20 >>>> free, or memory outside object was overwritten >>> > ... > > Finally there is news for Initio SBP-2 bridges. > http://marc.theaimsgroup.com/?l=3Dlinux-scsi&m=3D114038995826749 > > Could you try the scsi_mod parameters mentioned there? > > Alternatively, update to the latest 1394 drivers (soon to be in -mm,=20 > curently only at=20 > http://www.kernel.org/git/?p=3Dlinux/kernel/git/scjody/ieee1394.git o= r=20 > http://me.in-berlin.de/~s5r6/linux1394/updates/ ) and load sbp2 with=20 > "modprobe sbp2 force_inquiry_hack=3D1" before connecting the disk. > > If either one of these workarounds helps I would be interested in the= =20 > firmware revision which is logged by sbp2 with force_inquiry_hack=3D1= =2E=20 > You can get this value with unpatched drivers too. On my side, the problem seems to be "solved" since mid-December /=20 end-December (linus-git). latest linus-git: ieee1394: sbp2: sbp2_firmware_revision =3D 407 ieee1394: sbp2: Logged into SBP-2 device ieee1394: Node 0-00:1023: Max speed [S400] - Max payload [2048] Vendor: Initio Model: ST3400832A Rev: 4.07 Type: Direct-Access ANSI SCSI revision: 00 SCSI device sdc: 781422768 512-byte hdwr sectors (400088 MB) sdc: Write Protect is off sdc: Mode Sense: 00 13 00 00 sdc: got wrong page sdc: assuming drive cache: write through SCSI device sdc: 781422768 512-byte hdwr sectors (400088 MB) sdc: Write Protect is off sdc: Mode Sense: 00 13 00 00 sdc: got wrong page sdc: assuming drive cache: write through sdc: sdc1 sd 8:0:0:0: Attached scsi disk sdc #echo 8192 > /sys/module/scsi_mod/parameters/default_dev_flags #modprobe sbp2 ieee1394: Error parsing configrom for node 0-00:1023 =3D> device not recognised. #echo "Initio:0KLAT80:8192" >=20 /sys/module/scsi_mod/parameters/default_dev_flags #modprobe sbp2 ieee1394: sbp2: Driver forced to serialize I/O (serialize_io=3D1) ieee1394: sbp2: Try serialize_io=3D0 for better performance scsi9 : SBP-2 IEEE-1394 ieee1394: sbp2: Logged into SBP-2 device ieee1394: Node 0-00:1023: Max speed [S400] - Max payload [2048] Vendor: Initio Model: ST3400832A Rev: 4.07 Type: Direct-Access ANSI SCSI revision: 00 SCSI device sdc: 781422768 512-byte hdwr sectors (400088 MB) sdc: Write Protect is off sdc: Mode Sense: 00 13 00 00 sdc: assuming drive cache: write through SCSI device sdc: 781422768 512-byte hdwr sectors (400088 MB) sdc: Write Protect is off sdc: Mode Sense: 00 13 00 00 sdc: assuming drive cache: write through sdc: sdc1 sd 9:0:0:0: Attached scsi disk sdc -- =46r=C3=A9d=C3=A9ric Poncin - To unsubscribe from this list: send the line "unsubscribe linux-scsi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html