Date: Mon, 26 Feb 2018 21:50:18 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP Message-ID: <bug-225450-8-RLy5m731MY@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-225450-8@https.bugs.freebsd.org/bugzilla/> References: <bug-225450-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450 --- Comment #20 from John Baldwin <jhb@FreeBSD.org> --- Grrr, not sure why my patch didn't prevent it from recursing. You could try '|| cold' instead of '|| n == 1' perhaps. You could also try changing the 'DELAY(1)' in _mtx_lock_indefinite_check() in sys/kern/kern_mutex.c to be something like 'if (cold) cpu_spinwait(); else DELAY(1);' instead of the 'n == 1' hack. Oh, I see why 'n == 1' didn't help. The early_delay callback that is used when that 'n == 1' check fails is i8254_delay (set in amd64/amd64/machdep.c). -- You are receiving this mail because: You are the assignee for the bug.help
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