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Date: Fri, 17 Dec 2010 21:15:56 +0100 From: Stefan Richter <stefanr@...6.in-berlin.de> To: Alan Stern <stern@...land.harvard.edu> Cc: linux-pm@...ts.linux-foundation.org, <linux-ide@...r.kernel.org>, <linux-kernel@...r.kernel.org>, "Rafael J. Wysocki" <rjw@...k.pl> Subject: Re: [linux-pm] 2.6.37-rc5, pata_atiixp, DVD-ROM: kernel log flooded with "rpm_resume flags 0x4", "rpm_resume returns 1" On Dec 11 Alan Stern wrote: > On Sat, 11 Dec 2010, Stefan Richter wrote: > > > Hi, > > > > I just booted from 2.6.36 (without PM debugging configured) into > > 2.6.37-rc5 (with PM debugging enabled). There is endless log spam like > > this: > > > > Dec 11 17:11:31 stein kernel: scsi host6: rpm_resume flags 0x4 > > Dec 11 17:11:31 stein kernel: scsi host6: rpm_resume returns 1 > > Dec 11 17:11:31 stein kernel: scsi host6: rpm_resume flags 0x4 > > Dec 11 17:11:31 stein kernel: scsi host6: rpm_resume returns 1 > ... > > > Why is rpm_resume performed 6 times every two seconds? > > This is probably because hal probes the DVD drive every two seconds > looking for media changes. However that's not supposed to cause > rpm_resume to be called for the host unless runtime PM is allowed for > the DVD drive, which it isn't according to your listings below. So > there's a bug somewhere. I had 2.6.36 running since then and have now booted into 2.6.37-rc6. Yes, it is hal indeed. Shutting hal down avoids this logging activity. > > host6 is pata_atiixp with an: > > > > 00:14.1 IDE interface: ATI Technologies Inc SB700/SB800 IDE Controller > > (prog-if 8a [Master SecP PriP]) > > > > # grep . /sys/class/scsi_host/host6/power/* > > /sys/class/scsi_host/host6/power/async:enabled > > grep: /sys/class/scsi_host/host6/power/autosuspend_delay_ms: Input/output error > > /sys/class/scsi_host/host6/power/control:auto > > /sys/class/scsi_host/host6/power/runtime_active_kids:0 > > /sys/class/scsi_host/host6/power/runtime_active_time:0 > > /sys/class/scsi_host/host6/power/runtime_enabled:disabled > > /sys/class/scsi_host/host6/power/runtime_status:unsupported > > /sys/class/scsi_host/host6/power/runtime_suspended_time:0 > > /sys/class/scsi_host/host6/power/runtime_usage:0 > > This is the wrong directory (the class device, not the device itself). > You should look at /sys/class/scsi_host/host6/device/power instead. > And also /sys/class/scsi_host/host6/device/target6:0:0/power. OK, correct directory follows below. Actually, this time I see once every two seconds a message about logical unit 6:0:0:0 and 6 times every two seconds a message about host7: Dec 17 20:22:08 stein kernel: sd 6:0:0:0: rpm_resume flags 0x4 Dec 17 20:22:08 stein kernel: sd 6:0:0:0: rpm_resume returns 1 Dec 17 20:22:08 stein kernel: scsi host7: rpm_resume flags 0x4 Dec 17 20:22:08 stein kernel: scsi host7: rpm_resume returns 1 Dec 17 20:22:08 stein kernel: scsi host7: rpm_resume flags 0x4 Dec 17 20:22:08 stein kernel: scsi host7: rpm_resume returns 1 Dec 17 20:22:08 stein kernel: scsi host7: rpm_resume flags 0x4 Dec 17 20:22:08 stein kernel: scsi host7: rpm_resume returns 1 Dec 17 20:22:08 stein kernel: scsi host7: rpm_resume flags 0x4 Dec 17 20:22:08 stein kernel: scsi host7: rpm_resume returns 1 Dec 17 20:22:08 stein kernel: scsi host7: rpm_resume flags 0x4 Dec 17 20:22:08 stein kernel: scsi host7: rpm_resume returns 1 Dec 17 20:22:08 stein kernel: scsi host7: rpm_resume flags 0x4 Dec 17 20:22:08 stein kernel: scsi host7: rpm_resume returns 1 Dec 17 20:22:10 stein kernel: sd 6:0:0:0: rpm_resume flags 0x4 Dec 17 20:22:10 stein kernel: sd 6:0:0:0: rpm_resume returns 1 Dec 17 20:22:10 stein kernel: scsi host7: rpm_resume flags 0x4 Dec 17 20:22:10 stein kernel: scsi host7: rpm_resume returns 1 Dec 17 20:22:10 stein kernel: scsi host7: rpm_resume flags 0x4 Dec 17 20:22:10 stein kernel: scsi host7: rpm_resume returns 1 Dec 17 20:22:10 stein kernel: scsi host7: rpm_resume flags 0x4 Dec 17 20:22:10 stein kernel: scsi host7: rpm_resume returns 1 Dec 17 20:22:10 stein kernel: scsi host7: rpm_resume flags 0x4 Dec 17 20:22:10 stein kernel: scsi host7: rpm_resume returns 1 Dec 17 20:22:10 stein kernel: scsi host7: rpm_resume flags 0x4 Dec 17 20:22:10 stein kernel: scsi host7: rpm_resume returns 1 Dec 17 20:22:10 stein kernel: scsi host7: rpm_resume flags 0x4 Dec 17 20:22:10 stein kernel: scsi host7: rpm_resume returns 1 sd 6:0:0:0 is a USB card reader built into a monitor: Host: scsi6 Channel: 00 Id: 00 Lun: 00 Vendor: Generic Model: Ultra HS-SD/MMC Rev: 1.88 Type: Direct-Access ANSI SCSI revision: 00 This is from the power/ directory of the "6:0:0:0" device which is bound to driver sd: /sys/devices/pci0000:00/0000:00:12.2/usb1/1-1/1-1.1/1-1.1.1/1-1.1.1:1.0/host6/target6:0:0/6:0:0:0/power/async:enabled /sys/devices/pci0000:00/0000:00:12.2/usb1/1-1/1-1.1/1-1.1.1/1-1.1.1:1.0/host6/target6:0:0/6:0:0:0/power/control:on /sys/devices/pci0000:00/0000:00:12.2/usb1/1-1/1-1.1/1-1.1.1/1-1.1.1:1.0/host6/target6:0:0/6:0:0:0/power/runtime_active_kids:0 /sys/devices/pci0000:00/0000:00:12.2/usb1/1-1/1-1.1/1-1.1.1/1-1.1.1:1.0/host6/target6:0:0/6:0:0:0/power/runtime_active_time:1650131 /sys/devices/pci0000:00/0000:00:12.2/usb1/1-1/1-1.1/1-1.1.1/1-1.1.1:1.0/host6/target6:0:0/6:0:0:0/power/runtime_enabled:forbidden /sys/devices/pci0000:00/0000:00:12.2/usb1/1-1/1-1.1/1-1.1.1/1-1.1.1:1.0/host6/target6:0:0/6:0:0:0/power/runtime_status:active /sys/devices/pci0000:00/0000:00:12.2/usb1/1-1/1-1.1/1-1.1.1/1-1.1.1:1.0/host6/target6:0:0/6:0:0:0/power/runtime_suspended_time:0 /sys/devices/pci0000:00/0000:00:12.2/usb1/1-1/1-1.1/1-1.1.1/1-1.1.1:1.0/host6/target6:0:0/6:0:0:0/power/runtime_usage:1 host7 is the mentioned ATI SB700/SB800 IDE controller. Here is the power/ directory of the scsi_host device (rather than scsi_host class device): /sys/devices/pci0000:00/0000:00:14.1/host7/power/async:enabled /sys/devices/pci0000:00/0000:00:14.1/host7/power/control:auto /sys/devices/pci0000:00/0000:00:14.1/host7/power/runtime_active_kids:1 /sys/devices/pci0000:00/0000:00:14.1/host7/power/runtime_active_time:1935478 /sys/devices/pci0000:00/0000:00:14.1/host7/power/runtime_enabled:enabled /sys/devices/pci0000:00/0000:00:14.1/host7/power/runtime_status:active /sys/devices/pci0000:00/0000:00:14.1/host7/power/runtime_suspended_time:0 /sys/devices/pci0000:00/0000:00:14.1/host7/power/runtime_usage:0 The parent device 0000:00:14.1 is bound to the mentioned pata_atiixp, if this is of any importance at all. >From the child device: /sys/devices/pci0000:00/0000:00:14.1/host7/target7:0:0/power/async:enabled /sys/devices/pci0000:00/0000:00:14.1/host7/target7:0:0/power/control:auto /sys/devices/pci0000:00/0000:00:14.1/host7/target7:0:0/power/runtime_active_kids:1 /sys/devices/pci0000:00/0000:00:14.1/host7/target7:0:0/power/runtime_active_time:2402125 /sys/devices/pci0000:00/0000:00:14.1/host7/target7:0:0/power/runtime_enabled:enabled /sys/devices/pci0000:00/0000:00:14.1/host7/target7:0:0/power/runtime_status:active /sys/devices/pci0000:00/0000:00:14.1/host7/target7:0:0/power/runtime_suspended_time:0 /sys/devices/pci0000:00/0000:00:14.1/host7/target7:0:0/power/runtime_usage:0 -------- On Dec 11 Rafael J. Wysocki wrote: > On Saturday, December 11, 2010, Stefan Richter wrote: > > Hi, > > > > I just booted from 2.6.36 (without PM debugging configured) into > > 2.6.37-rc5 (with PM debugging enabled). There is endless log spam like > > this: > > I guess you have either CONFIG_PM_VERBOSE set or CONFIG_PM_DEBUG unset. > > Which is the case? I have both options off on 2.6.36 and older kernels. I have both options on on 2.6.37-rc5/-rc6 (because I wanted to check something unrelated on 2.6.37). -- Stefan Richter -=====-==-=- ==-- =---= http://arcgraph.de/sr/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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