Date: Wed, 12 Nov 2003 18:51:34 -0500 (EST) From: John Baldwin <jhb@FreeBSD.org> To: John Baldwin <jhb@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: RE: cvs commit: src/sys/kern subr_turnstile.c Message-ID: <XFMail.20031112185134.jhb@FreeBSD.org> In-Reply-To: <200311122348.hACNmgKZ032190@repoman.freebsd.org>
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On 12-Nov-2003 John Baldwin wrote: > jhb 2003/11/12 15:48:42 PST > > FreeBSD src repository > > Modified files: > sys/kern subr_turnstile.c > Log: > - Close a race where a thread on another CPU could release a contested lock > and empty its turnstile while the blocking threads still pointed to the > turnstile. If the thread on the first CPU blocked on a lock owned by > one of the threads blocked on the turnstile just woken up, then the > first CPU could try to manipulate a bogus thread queue in the turnstile > during priority propagation. > - Update locking notes for ts_owner and always clear ts_owner, not just > under INVARIANTS. > > Tested by: sam (1) This might fix the SMP problems on current. Please let me know if there are any other turnstile/mutex/priority_propagation related panics. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/
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