On Mon, Aug 26, 2002 at 09:41:43AM -0700, Maksim Yevmenkin wrote: > John Baldwin wrote: > > > > On 26-Aug-2002 M. Warner Losh wrote: > > > can you call wakeup(9) from a fast interrupt handler? > > [ ...] > > > > The only reason I ask is because sio seems to go out of its way to > > > schedule a soft interrupt to deal with waking up processes, which then > > > calls wakeup... > > > > Since wakeup only needs a spin lock, it is probably ok. You just can't call > > anything that would sleep (in any interrupt handler) or block on a non-spin > > mutex. > > what is the general locking technique for interrupt handlers? > there must be some sort of locking, right?
You are allowed to use mutex locks (both spin and MTX_DEF), only you are only allowed to user the former for fast interrupt handlers. -- Bosko Milekic * [EMAIL PROTECTED] * [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
