John Baldwin wrote: > Yes, calling free() without Giant is about as good as calling fdrop() without > Giant Alfred. :)
Alfred would be right, for per processor memory pools. 8-). > >> And on the way into the system it does: > >> lock process > >> crhold() (which includes mutex ops) > >> unlock process > > > > This isn't needed, at least afaik. > > Not strictly for the comparison as Julian and Terry pointed out since the race > can occur anyway (i.e., you don't need the lock to see if p_ucred changed), > however, if you are actually doing a crhold(), you want to make sure p_ucred > isn't stale, so you need the proc lock. No. If you _depend_ on the frequency of change being low, you can do this with only atomic reference counts. See the pseudo code in my other posting, in direct response to you. -- Terry To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
