Bruce Evans wrote: > > basically it seems to get pissy if it doesn't get the file slot it asks > > for, so if another thread wins the race here, we'll panic. this problem > > seems to also exist for 4.x and previous versions of freebsd. > > > > I'd like to get this fixed. Any suggestions? I think simply > > removing the assertion should remove this hazzard, correct?
I think if you delayed the allocation, it'd be OK, but I don't see a clean way to do it without a bit of work. > Something like that. This was apparently missed when the retry loop was > added. Lite2 has the panic but not the retry loop. > > BTW, the retry loop also picks up changes to the limit on descriptors. > In fdalloc(), the corresponding limit is treated as a loop invariant, > but it is not invariant. I think the process's rlimit can't change, > but maxfilesperproc can change even if the process doesn't block, since > it is not protected by FILEDESC_LOCK() :-(. Fortunately, the > maxfilesperproc limit isn't very important. I think this is a requirement. The problem is the case where the maxfilesperproc has *not* changed, and some other thread wins the race to the last one, you have to honor that, and fail the current attempt. Retries are fugly. 8-(. -- Terry To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
