On Fri, Sep 19, 2008 at 06:58:21PM +0530, partha chowdhury wrote: > i add the "irqpoll" option to kernel line. after the system booted i log > into X with tty1 also login as root with the command " tail > -f /var/log/messages" for monitoring . After 10 to 20 minutes i got the > same message again but this time immediately the system froze up ! > > i tried it 5 times now and each time is the same result.i also noticed > that the system was behaving very slowly till the message came up like > usually folder copy operation - i usually get 70-90MB/s according to > vmstat 1 comand, but with irqpoll the maximum i noticed was like > 10MB/s. > > Am i doing something wrong ? > I'm seeing this same problem on IBM HS21-8853 blades. It _seems_ like a bug in IRQ routing in BIOS/motherboard.. ACPI issue? With IBM blades I'm able to fix the problem by generating the initrd image with "--without-usb" switch.. this delays the USB module initialization/loading, somehow fixing the problem.. giving different IRQ to USB controller. -- Pasi