----- Original Message ----- From: "Julian Elischer" <[EMAIL PROTECTED]> To: "David Xu" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Thursday, July 04, 2002 4:36 PM Subject: Re: Timeout and SMP race
> > > On Thu, 4 Jul 2002, David Xu wrote: > > > while we are getting rid of Giant, current race condition between softclock() > > and callout_stop() is unacceptable. the race causes two many places in source > > code would be modified to fit this new behaviour, besides this, everywhere > > callout_stop() is used need to hold sched_lock and do a mi_switch() and > > modify td_flags is also unacceptable, this SMP race should be resolved in > > kern_timeout.c. > > > > David Xu > > This is probably true.. > the current hacks for this are rather horrible. I think there msut be > better ways. Your suggestion sounds plausible. > > if another thread other than softclock itself is calling callout_stop(), and callout_stop() detected that softclock is currently running the callout, it should wait until softclock finishes the work, then return. -David Xu To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
