From mboxrd@z Thu Jan 1 00:00:00 1970 From: Artem Bokhan Subject: sata_mv, io stucks Date: Fri, 17 Oct 2008 19:25:45 +0700 Message-ID: <48F88449.1000704@ngs.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=KOI8-R; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from smtpout1.ngs.ru ([195.93.186.195]:45295 "EHLO smtpout1.ngs.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753468AbYJQMcT (ORCPT ); Fri, 17 Oct 2008 08:32:19 -0400 Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org, tj@kernel.org I try to simulate random reads with "sysbench --test=fileio --num-threads=16 --max-requests=9999999 --max-time=60 --init-rng=on --file-num=16 --file-fsync-freq=0 --file-test-mode=rndrd --file-total-size=30G run" Two marvell controllers, 16 disks, software raid10, IO stucks on different disks, kernel 2.6.26.5. With default ubuntu's 8.04 2.6.24 kernel the problem can not be repeated [ 289.851609] ata11.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x6 frozen [ 289.851695] ata11.00: cmd 61/08:00:60:1e:bf/00:00:01:00:00/40 tag 0 ncq 4096 out [ 289.851697] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) [ 289.851774] ata11.00: status: { DRDY } [ 289.851834] ata11: hard resetting link [ 290.649259] ata11: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 290.749239] ata11.00: max_sectors limited to 256 for NCQ [ 290.809189] ata11.00: max_sectors limited to 256 for NCQ [ 290.809194] ata11.00: configured for UDMA/133 [ 290.809200] ata11: EH complete [ 290.809242] sd 10:0:0:0: [sdk] 1953525168 512-byte hardware sectors (1000205 MB) [ 290.809258] sd 10:0:0:0: [sdk] Write Protect is off [ 290.809263] sd 10:0:0:0: [sdk] Mode Sense: 00 3a 00 00 [ 290.809286] sd 10:0:0:0: [sdk] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA lspci: 05:01.0 SCSI storage controller: Marvell Technology Group Ltd. MV88SX6081 8-port SATA II PCI-X Controller (rev 09) Subsystem: Marvell Technology Group Ltd. Unknown device 11ab Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr+ Stepping- SERR+ FastB2B+ Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR- TAbort- SERR-