1 message in org.freebsd.freebsd-bugskern/152228: Xen/PV panic with machde...| From | Sent On | Attachments |
|---|---|---|
| Colin Percival | Nov 13, 2010 9:03 pm |
| Subject: | kern/152228: Xen/PV panic with machdep.idle_mwait=1 | |
|---|---|---|
| From: | Colin Percival (cper...@FreeBSD.org) | |
| Date: | Nov 13, 2010 9:03:21 pm | |
| List: | org.freebsd.freebsd-bugs | |
Number: 152228 Category: kern Synopsis: Xen/PV panic with machdep.idle_mwait=1 Confidential: no Severity: serious Priority: low Responsible: freebsd-bugs State: open Quarter: Keywords: Date-Required: Class: sw-bug Submitter-Id: current-users Arrival-Date: Sun Nov 14 05:10:04 UTC 2010 Closed-Date: Last-Modified: Originator: Colin Percival Release: FreeBSD 9.0-CURRENT Organization: Environment:
FreeBSD HEAD ca. 2010-11-12, XEN kernel.
This bug does not occur in a 2010-09-13 tree (aka. prior to mav's timer refactoring).
Description:
Kernel panic:
Fatal trap 1: privileged instruction fault while in kernel mode cpuid = 0; apic id = 00 instruction pointer = 0x21:0xc031ac5c stack pointer = 0x29:0xc2719c84 frame pointer = 0x29:0xc2719c88 code segment = base 0x0, limit 0xf9800, type 0x1b = DPL 1, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 11 (idle: cpu0) trap number = 1 panic: privileged instruction fault cpuid = 0 KDB: stack backtrace: #0 0xc0106057 at kdb_backtrace+0x47 #1 0xc00d3c47 at panic+0x117 #2 0xc032efa3 at dblfault_handler+0x3c3 #3 0xc032f8ad at trap+0x5ed #4 0xc03150bb at alltraps+0x1b #5 0xc031acb0 at cpu_idle+0x30 #6 0xc00f9133 at sched_idletd+0x263 #7 0xc00aa7a8 at fork_exit+0xb8 #8 0xc0315134 at fork_trampoline+0x8 Uptime: 1s
The privileged instruction fault is being triggered by mwait.
How-To-Repeat: Fix:
Setting machdep.idle_mwait=0 prevents this panic.
Release-Note: Audit-Trail: Unformatted:
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