Jeff, I'm a hardware engineer at Hewlett-Packard. Some of our hardware customers are experiencing the qc-timeout documented in https://bugzilla.redhat.com/show_bug.cgi?id=453808 Specifically the issue is described as follows: From: Mohamed Sent: Tuesday, February 10, 2009 4:24 PM To: guild-test(mailer list); ipc-platform-team(mailer list) Subject: 7828H4 Kernel message Hi, I see the following messages continuously appear on the 7828H4 server console. This server is running with Guild TT 11 - Build 10 and performing the CUCMBE load test. Feb 10 16:45:59 cores1 kern 4 kernel: ata3.00: qc timeout (cmd 0xa0) Feb 10 16:45:59 cores1 kern 3 kernel: ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen Feb 10 16:45:59 cores1 kern 3 kernel: ata3.00: (BMDMA stat 0x25) Feb 10 16:45:59 cores1 kern 3 kernel: ata3.00: cmd a0/01:00:00:00:00/00:00:00:00:00/a0 tag 0 cdb 0x25 data 8 in Feb 10 16:45:59 cores1 kern 4 kernel: res 51/20:03:00:00:00/00:00:00:00:00/a0 Emask 0x5 (timeout) Feb 10 16:46:06 cores1 kern 4 kernel: ata3: port is slow to respond, please be patient (Status 0xd0) Feb 10 16:46:29 cores1 kern 3 kernel: ata3: port failed to respond (30 secs, Status 0xd0) Feb 10 16:46:29 cores1 kern 6 kernel: ata3: soft resetting port Feb 10 16:46:29 cores1 kern 6 kernel: ata3.00: configured for UDMA/33 Feb 10 16:46:29 cores1 kern 6 kernel: ata3: EH complete These messages are recorded at /var/log/active/syslog/messages. Is this a known issue ? Do you know whether increasing ata_probe_timeout actually helped the problem? I edited /sys/module/libata/ata_probe_timeout and changed its value from 30000 to 100000 -qc timeouts still occur. Did I implement the workaround correctly? Thanks, Julia courtney-Bakke Hardware Engineer Industry Standard Servers Hewlett-Packard -----Original Message----- From: Bartlomiej Zolnierkiewicz [mailto:bzolnier@xxxxxxxxx] Sent: Friday, April 03, 2009 11:15 AM To: Courtney-Bakke, Julia (ISS H/W EPR) Subject: Re: Bug 453808 - qc timeout probing TEAC DV-28E-V CD/DVD drive on SATA/PATA bridge For libata issues please contact libata Maintainer: Jeff Garzik <jgarzik@xxxxxxxxx> also if possible try to use linux-ide@xxxxxxxxxxxxxxx mailing list instead of private mails for discussing Linux ATA issues. On Friday 03 April 2009, Courtney-Bakke, Julia (ISS H/W EPR) wrote: > Actually ... This is the bug I had a question about. > > Bug 453808 - qc timeout probing TEAC DV-28E-V CD/DVD drive on > SATA/PATA bridge > > Do you know whether increasing ata_probe_timeout actually helped the > problem. > > I edited /sys/module/libata/ata_probe_timeout and changed its value > from 30000 to 100000 > > -qc timeouts still occur > > Did I implement the workaround correctly? > > Thanks, > Julia courtney-Bakke > Hardware epr > > > > -----Original Message----- > From: Bartlomiej Zolnierkiewicz [mailto:bzolnier@xxxxxxxxx] > Sent: Friday, April 03, 2009 9:01 AM > To: Courtney-Bakke, Julia (ISS H/W EPR) > Subject: Re: Bug 10887 - Kernel report fake device busy intermittently > > > Hi, > > On Friday 03 April 2009, Courtney-Bakke, Julia (ISS H/W EPR) wrote: > > Hello, > > I work in engineering for Hewlett Packard. We have customers in the field that are experiencing Bug 10887 - Kernel report fake device busy intermittently. > > > > Is the only workaround to patch and recompile kernel? > > As a workaround you may try to fix your user-space to not access /proc/ide/hd*/identify (if this is acceptable). > > Unfortunately to fully fix the issue revised kernel is needed. > > Thanks, > Bart > -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
