Robert Hancock wrote: > Larry Finger wrote: >> If a particular routine needs to lock a mutex, but it may be entered >> with that mutex already locked, >> would the following code be SMP safe? >> >> hold_lock = mutex_trylock() >> >> .. >> >> if (hold_lock) >> mutex_unlock() > > Not if another task could be acquiring that lock at the same time, which > is probably the case, otherwise you wouldn't need the mutex. In other > words, if you're going to do this, you might as well toss the mutex > entirely as it's about the same effect.. >
Thanks for the help. Someday, I hope to understand this stuff. Larry - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
