Hi Devendra, On Tue, Apr 24, 2012 at 03:24:23PM +0530, devendra rawat wrote: > Hi, > A switch driver is causing soft lockup on Montavista Linux Kernel > 2.6.10 system. > While browsing through the code of the driver. I came across a snippet > where after disabling the interrupts > a call is made to interruptible_sleep_on_timeout(). > The code snippet is like > cli(); > init_waitqueue_head(&queue); > interruptible_sleep_on_timeout(&queue, USEC_TO_JIFFIES(usec)); > thread_check_signals(); > sti(); > I need to know the side effect of this sort of code, can it be > responsible for the softlockup of the system ? Its a PowerPC based > system. you cannot call sleep functions after disabling interrupts, because no interrupt will arrive for the scheduler to see the timeout and resume your task. Greetings, Philipp _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
