Re: [uml-devel] irq handling deadlock since 2.4.2

[Jeff D. <jd...@ka...>]

bu...@gn... said:
> - sigio_handler calls do_IRQ to handle input on a certain fd. 
> - During the handling of that IRQ, another event on the same file descriptor
>   comes in, so do_IRQ or one of its children is preempted by sigio_handler. 

This can't happen.  That fd is removed from active_fds until it's put back by 
the driver calling reactivate_fd.  Also, the only time that signals are active 
in that stretch of code is while bh's or tasklets are running.

				Jeff