On 10 Oct, Stefan Farfeleder wrote: > On Tue, Oct 08, 2002 at 09:26:29PM -0700, Don Lewis wrote: >> On 8 Oct, Stefan Farfeleder wrote:
>> > However, WITNESS complains (only once) about this: >> > lock order reversal >> > 1st 0xc662140c kqueue mutex (kqueue mutex) @ >/freebsd/current/src/sys/kern/kern_event.c:714 >> > 2nd 0xc6727d00 pipe mutex (pipe mutex) @ >/freebsd/current/src/sys/kern/sys_pipe.c:1478 >> >> That's pretty similar to the lock order reversal I've seen in the pipe >> code and it's interaction with sigio, which is not suprising since >> pipeselwakeup() calls both pgsigio() and KNOTE(), often while the pipe >> lock is held. Correctly fixing this doesn't look easy ... > > Is it just a warning or does it pose a real problem? It's a warning of a potential problem. If someone else was trying to grab the locks in the opposite order at the same time, you'd get a deadlock. To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
