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Message-Id: <E1Q9j2p-0008Rr-00@www.xplot.org> Date: Tue, 12 Apr 2011 15:14:35 -0400 From: Tim Shepard <shep@...m.mit.edu> To: linux-kernel@...r.kernel.org Subject: 2.6.39-rc3 udevadm settle timeout, many hdb events, interrupt storm 2.6.38 is working fine on my PowerBook G4 (powerpc) and has none of the issues described below. Last week I tried 2.6.39-rc2 and it hung on reboot. Same thing with 2.6.39-rc3 this week. I've tracked this down to the "udevadm settle" in /etc/init.d/udev (from Debian squeeze). If I am patient it does timeout after 180 seconds and continues booting. But after booting finishes udev is still chewing CPU cycles and load average is stuck at 1. After the system is up: # udevadm monitor monitor will print the received events for: UDEV - the event which udev sends out after rule processing KERNEL - the kernel uevent KERNEL[1302632376.412055] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632376.460742] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) UDEV [1302632376.501101] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632376.510745] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632376.560742] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) UDEV [1302632376.601155] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632376.610755] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632376.660744] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) UDEV [1302632376.701186] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632376.710751] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632376.760727] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) UDEV [1302632376.801135] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632376.810753] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632376.860748] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) UDEV [1302632376.901068] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632376.910748] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632376.960746] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) UDEV [1302632377.004023] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632377.010786] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632377.210681] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632377.260749] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) UDEV [1302632377.301096] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632377.310749] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632377.360749] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) UDEV [1302632377.401136] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632377.410753] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632377.460748] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) UDEV [1302632377.501264] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632377.510749] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632377.560730] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) UDEV [1302632377.601147] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) KERNEL[1302632377.610793] change /devices/pci0002:24/0002:24:0d.0/ide0/0.1/block/hdb (block) ^C# # # # dmesg | grep hdb hdb: MATSHITADVD-R UJ-846, ATAPI CD/DVD-ROM drive hdb: host max PIO4 wanted PIO255(auto-tune) selected PIO4 hdb: UDMA/66 mode selected ide-cd: hdb: ATAPI 24X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache # # dmesg | grep ide radeonfb: Using Firmware dividers 0x00040089 from PPLL 0 ide-pmac 0002:24:0d.0: enabling device (0000 -> 0002) ide-pmac: Found Apple UniNorth ATA-6 controller (PCI), bus ID 3, irq 39 Probing IDE interface ide0... ide0 at 0xf106a000-0xf106a070,0xf106a160 on irq 39 ide-gd driver 1.18 ide-cd driver 5.00 ide-cd: hdb: ATAPI 24X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache # I am getting over 1300 interrupts per second for ide0: # while grep ide /proc/interrupts && sleep 1 ; do : ; done 39: 722724 MPIC 1 ide0 39: 723042 MPIC 1 ide0 39: 723364 MPIC 1 ide0 39: 723685 MPIC 1 ide0 39: 724012 MPIC 1 ide0 39: 724334 MPIC 1 ide0 39: 724656 MPIC 1 ide0 39: 724978 MPIC 1 ide0 39: 725296 MPIC 1 ide0 39: 725615 MPIC 1 ide0 39: 725936 MPIC 1 ide0 39: 726257 MPIC 1 ide0 39: 726577 MPIC 1 ide0 39: 726901 MPIC 1 ide0 39: 727226 MPIC 1 ide0 39: 727549 MPIC 1 ide0 39: 727868 MPIC 1 ide0 39: 728190 MPIC 1 ide0 39: 728512 MPIC 1 ide0 39: 728833 MPIC 1 ide0 39: 729152 MPIC 1 ide0 39: 729473 MPIC 1 ide0 39: 729800 MPIC 1 ide0 39: 730111 MPIC 1 ide0 39: 730435 MPIC 1 ide0 39: 730755 MPIC 1 ide0 39: 731083 MPIC 1 ide0 39: 731402 MPIC 1 ide0 39: 731720 MPIC 1 ide0 39: 732052 MPIC 1 ide0 39: 732368 MPIC 1 ide0 39: 732689 MPIC 1 ide0 39: 733010 MPIC 1 ide0 ^C I tried using the CDROM drive and it actually does work (as /dev/hdb). So the only real problems are the 180 second hang while booting and the interrupt storm and udev event storm that continues. Any hints? -Tim Shepard shep@...m.mit.edu -- 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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