Date: Wed, 25 Nov 2015 04:27:09 +0000 From: bugzilla-noreply@freebsd.org To: emulation@FreeBSD.org Subject: [Bug 195819] TSC calibration can hang FreeBSD in Hyper-V Generation 2 VM Message-ID: <bug-195819-4077-BbyoVZb78j@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-195819-4077@https.bugs.freebsd.org/bugzilla/> References: <bug-195819-4077@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195819 --- Comment #17 from Ed Maste <emaste@freebsd.org> --- > With "set machdep.disable_tsc_calibration=1", the bootup can go further but the > VM still hangs later -- I guess this may be a bad side effect of disabling TSC > calibration and I guess the TSC has to be calibrated here, e.g., by the ACPI > timer? When machdep.disable_tsc_calibration=1 is set the TSC frequency should be determined from the CPU identification instead. Are you able to try a verbose boot with machdep.disable_tsc_calibration=1 set, and attach the boot log? -- You are receiving this mail because: You are the assignee for the bug.
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