Public bug reported: Under load, this happens rather often:
Jul 18 22:55:24 nun kernel: [86674.467410] aacraid: Host adapter abort request (0,0,2,0) Jul 18 22:55:24 nun kernel: [86674.467487] aacraid: Host adapter abort request (0,0,3,0) Jul 18 22:55:24 nun kernel: [86674.467617] aacraid: Host adapter reset request. SCSI hang ? Jul 18 22:57:26 nun kernel: [86815.728423] aacraid: Host adapter abort request (0,0,0,0) Jul 18 22:57:26 nun kernel: [86815.728500] aacraid: Host adapter abort request (0,0,3,0) Jul 18 22:57:26 nun kernel: [86815.728573] aacraid: Host adapter abort request (0,0,2,0) Jul 18 22:57:26 nun kernel: [86815.728640] aacraid: Host adapter abort request (0,0,1,0) Jul 18 22:57:26 nun kernel: [86815.728772] aacraid: Host adapter reset request. SCSI hang ? Access to the storage thus stalls for ten seconds or so. I have successfully worked around the problem by using "schedtool -a 1 pid-of-basically-everything", so it seems to be an SMP-related problem. However, one CPU is _somewhat_ slower than four, which is quite noticeable, so we'd like to get this handled somehow :-/ lspci: 05:06.0 SCSI storage controller: Adaptec RAID subsystem HBA (rev 01) Subsystem: Dell PowerEdge 2400,2500,2550,4400 Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 7 BIST result: 00 I/O ports at cc00 [size=256] Memory at fccff000 (64-bit, non-prefetchable) [size=4K] Expansion ROM at fcd00000 [disabled] [size=128K] Capabilities: [dc] Power Management version 2 05:06.1 SCSI storage controller: Adaptec RAID subsystem HBA (rev 01) Subsystem: Dell PowerEdge 2400,2500,2550,4400 Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 11 BIST result: 00 I/O ports at c800 [size=256] Memory at fccfe000 (64-bit, non-prefetchable) [size=4K] Expansion ROM at f8100000 [disabled] [size=128K] Capabilities: [dc] Power Management version 2 lspci -n: 05:06.0 0100: 9005:00c5 (rev 01) Subsystem: 1028:00c5 Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 7 BIST result: 00 I/O ports at cc00 [size=256] Memory at fccff000 (64-bit, non-prefetchable) [size=4K] Expansion ROM at fcd00000 [disabled] [size=128K] Capabilities: [dc] Power Management version 2 05:06.1 0100: 9005:00c5 (rev 01) Subsystem: 1028:00c5 Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 11 BIST result: 00 I/O ports at c800 [size=256] Memory at fccfe000 (64-bit, non-prefetchable) [size=4K] Expansion ROM at f8100000 [disabled] [size=128K] Capabilities: [dc] Power Management version 2 ** Affects: linux Importance: Unknown Status: Confirmed ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Bug watch added: Linux Kernel Bug Tracker #11120 http://bugzilla.kernel.org/show_bug.cgi?id=11120 ** Also affects: linux via http://bugzilla.kernel.org/show_bug.cgi?id=11120 Importance: Unknown Status: Unknown -- aacraid driver stalls on high-load SMP machines https://bugs.launchpad.net/bugs/249964 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs