On Nov 15, 2007 8:32 AM, Mark Lord <liml@xxxxxx> wrote: > I have been reporting this off and on since 2.6.23 was released. > This problem was not apparent up to perhaps 2.6.23-rc8, > but definitely became common in 2.6.23 and 2.6.23.1. > > Most of the time, a resume-from-RAM on my notebook takes about 2.1 seconds > of kernel time to complete. > > Once in a while, it takes *much* longer, in the 14-20 second range. > These long events *seem* to be mostly after the notebook has been > in suspend for a longish time, but there's really nothing consistent here. > > So git-bisect isn't going to work for this one. I recently rebuilt the kernel > to include printk timestamps, and then it went 2 days without the issue happening, > until this morning (after an overnight suspend) finally. > > The machine is a Dell Inspiron 9400, Intel chipset + Core2Duo 2.1GHZ w/3GB DDR2. > PCIe express chipset, ATI graphics, SATA hard drive. > > 00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS/940GML and 945GT Express Memory Controller Hub (rev 03) > 00:01.0 PCI bridge: Intel Corporation Mobile 945GM/PM/GMS/940GML and 945GT Express PCI Express Root Port (rev 03) > 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01) > 00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01) > 00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 01) > 00:1c.3 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 4 (rev 01) > 00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 01) > 00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 01) > 00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 01) > 00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 01) > 00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01) > 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1) > 00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 01) > 00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) Serial ATA Storage Controller IDE (rev 01) > 00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01) > 01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility X1400 > 03:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02) > 03:01.0 FireWire (IEEE 1394): Ricoh Co Ltd Unknown device 0832 > 03:01.1 Generic system peripheral [0805]: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 19) > 03:01.2 System peripheral: Ricoh Co Ltd Unknown device 0843 (rev 01) > 03:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 0a) > 03:01.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 05) > 0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02) > > There's also a USB2 hub connected, with the Logitech mouse being the > only thing plugged into it at present. > > The best clue I have of what is happening, other than that it was first > seen during the late 2.6.23-rc* series, are the following two sets of > kernel logs. The first set is from a "normal" fast wake-up, > and the second set is from the "slow" wake-up seen this morning. > > Both logs show the same information, in pretty much the same order. > The BIG difference is a bunch of unexplained pauses of exactly 1-second > each that occur during the slow wakeup. > > The only other difference is that the SATA disk messages are placed > differently within the two logs. I'm thinking on that one but it > doesn't look significant to me. > > The real question is, why the 1-sec pauses? Well, and why the 1-second pauses eventually stop, too. Seems interesting that they don't continue. Also, they're pretty much dead-on one- and two-second pauses, with HZ accuracy. Is this with a NO_HZ kernel? _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
