Date: Wed, 25 Nov 2015 06:37:51 +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-Az9XJbN8Lp@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 #18 from Dexuan Cui <decui@microsoft.com> --- (In reply to Ed Maste from comment #17) > When machdep.disable_tsc_calibration=1 is set the TSC frequency should be > determined from the CPU identification instead. OK, got it. > Are you able to try a verbose boot with machdep.disable_tsc_calibration=1 set, and > attach the boot log Chris Lee has attached the log/screen in Comment 14 when the kernel hangs. I got the same log. It looks the kernel is in some busy loop forever. NB: I guess Chris uses SMP VM. If I use only 1 vCPU, FreeBSD 10.2 VM's kernel can boot fine and it finally stops at the Welcome screen for the installation (I'll attach the screen) -- the (virtual) keyboard doesn't work, so we can't go further... This is because Generation-2 Hyper-V VM doesn't have the legacy 8042 keyboard, so a driver for the Hyper-V synthetic keyboard device is required inside the FreeBSD VM (BTW, Linux already has the driver) -- a new TODO. :-) -- You are receiving this mail because: You are the assignee for the bug.
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