On Thursday, 15 of November 2007, Mark Lord wrote: > > Hi! > > > >> > 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? > > > > Can you try nohz=off highres=off? Strange stuff is happening with > > nohz. > .. > > (added Ingo to CC: list: maybe this is some weird interaction with CFS > and jiffies being reset to 0 on resume ??) > > I can try it, but it won't help debug the problem much. Well, if you could verify that it doesn't happen at all with NO_HZ unset, that would be a valuable data point, IMO. > Remember, this happens very inconsistently, maybe 3-4 times a day, > or not at all for 3-4 days. > > But if somebody has a specific bug-fix patch that could explain this, > then I'll happily apply it here. I'm not aware of any fix related to the symptoms that you observe. Greetings, Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
