> To illustrate the probability of 1 instruction race, I would suggest to > look at PCPU_ADD() implementation for all arches except amd64/i386 and > find out that it is prone to this race. Hitting the race in PCPU_ADD() > will usually lead to mangling vm_meter statistics. Did we ever observe > this in practice? No.
I dunno. Has anyone actually looked at that? :) On a busy system you may find those small race windows exist enough to be annoying. Case in point - the recent callout code race. The race between "read" "modify" "write" was tiny, but enough to break things. -adrian _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
