> > > Can you use a placeholder vnode as a place to restart the scan? > > > you might have to mark it special so that other threads/things > > > (getnewvnode()?) don't molest it, but it can provide for a convenient > > > restart point. > > > > That was one of the solutions that I considered and rejected since it > > would significantly increase the overhead of the loop. > > The solution provided by Kostik Belousov that uses uio_yield looks like > > a find solution. I intend to try it out on some servers RSN. > > Out of curiosity's sake, why would it make the loop slower? one > would only add the placeholder when yielding, not for every iteration.
Actually, I misread your suggestion and was thinking marker flag, rather than placeholder vnode. Sorry about that. The current code actually already uses a marker vnode. It is hidden and obfuscated in the MNT_VNODE_FOREACH macro, further hidden in the __mnt_vnode_first/next functions, so it should be safe from vnode reclaimation/free problems. -DG David G. Lawrence President Download Technologies, Inc. - http://www.downloadtech.com - (866) 399 8500 The FreeBSD Project - http://www.freebsd.org Pave the road of life with opportunities. _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
