race condition in knote deletion?
dillon at apollo.backplane.com
Tue Feb 1 17:29:09 PST 2011
: kn->kn_status |= KN_DELETING | KN_REPROCESS;
:So wouldn't another cpu running knote_release() while the 1st one
:sleeps call knote_detach_and_drop() too
:causing a crash when the 1st cpu resumes?
Only the thread which set KN_PROCESSING can release the knote,
so it shouldn't be possible. Other threads will see that KN_PROCESSING
is already set and not try to do anything drastic to the knote.
<dillon at backplane.com>
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