https://bugzilla.kernel.org/show_bug.cgi?id=16021 Summary: mptsas target reset under heavy duty Product: IO/Storage Version: 2.5 Kernel Version: 2.6.32 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: SCSI AssignedTo: linux-scsi@xxxxxxxxxxxxxxx ReportedBy: dujun@xxxxxxxxxxxxx Regression: No We have mptsas driver 4.22.00.00 from lsi official web site driving 1068e chip which is connected to two lsi 12x expander chips. Each of the chips connects 8 sata disks. Under heavy duty, i.e., when we connect 16 hdd and build the linux software raid5, there are lots of error reports in dmesg: [20826.611906] mptscsih: ioc0: task abort: FAILED (sc=ffff88007b348c00) [20826.611919] mptscsih: ioc0: attempting target reset! (sc=ffff88007dc78700) [20826.611921] sd 4:0:16:0: [sdq] CDB: Read(10): 28 00 54 94 55 00 00 00 90 00 [20827.361823] mptscsih: ioc0: target reset: SUCCESS (sc=ffff88007dc78700) [20837.361008] mptscsih: ioc0: attempting task abort! (sc=ffff88007dc78700) [20837.361011] sd 4:0:16:0: [sdq] CDB: Test Unit Ready: 00 00 00 00 00 00 [20837.385655] mptbase: ioc0: LogInfo(0x31112000): Originator={PL}, Code={Reset}, SubCode(0x2000) [20838.111238] mptbase: ioc0: LogInfo(0x31130000): Originator={PL}, Code={IO Not Yet Executed}, SubCode(0x0000) This would halt the io for about two minutes and then after successful target reset, the io is continuing. If we reduce the hdd to less than 12, or we set the scsi command depth of each of the disks to 1, the build process could complete without any error. We also tested the same scenario with lsi 36x expander chip without any problem. Is this a mptsas driver bug or just the 12x expander chip bug? -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
