In message <[EMAIL PROTECTED]>, "M. Warner Losh" writes : >In message: <[EMAIL PROTECTED]> > "Poul-Henning Kamp" <[EMAIL PROTECTED]> writes: >: In message <[EMAIL PROTECTED]>, "M. Warner Losh" writes >: : >: >: >While this may be a good idea, I'm hesitant about races that it may >: >introduce. This is the classic point of attack: do something between >: >steps of a formerly atomic operation that was made non-atomic. I >: >can't think of anything off the top of my head, but I'm still >: >concerned. >: >: We have ways of closing the race if need be, but they're all slightly >: kludgy, but I am not overly concerned about those races as long as >: the default is to not give access. > >I guess I'm worried about a device that comes and goes and comes back >and there being some difference between the two that causes us to >bogusly do something to the new device that was appropriate for the >old one, but not the new one...
That scenario is always present as far as I can tell... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "[EMAIL PROTECTED]"
