Date: Tue, 15 Sep 2009 23:16:24 GMT From: Kevin Day <kevin@your.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/138863: pmap_invalidate_cache_range panic on boot in 8.0-BETA4 in XenServer VM Message-ID: <200909152316.n8FNGOZO045156@www.freebsd.org> Resent-Message-ID: <200909152320.n8FNK352001680@freefall.freebsd.org>
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>Number: 138863
>Category: kern
>Synopsis: pmap_invalidate_cache_range panic on boot in 8.0-BETA4 in XenServer VM
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Sep 15 23:20:03 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator: Kevin Day
>Release: 8.0-BETA4
>Organization:
Your.Org, Inc.
>Environment:
8.0-BETA4 dvd boot disk
>Description:
FreeBSD 7.x and early snapshots of 8.0 worked fine in XenServer VM instances. Trying 8.0-BETA4 gives me: (hand typed)
real memory = 536870912 (512 MB)
avail memory = 482701312 (460 MB)
kernel trap 9 with interrupts disabled
Fatal trap 9: general protection fault while in kernel mode
cpuid = 0; apic id = 00
instruction pointer = 0x20:0xfffffff805b2e3
stack pointer = 0x20:0xffffffff81402bb0
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = resume, IOPL = 0
current process = 0 ()
[thread pid 0 tid 0 ]
Stopped at pmap_invalidate_cache_range+0x43: clflushl (%rdi)
db> bt
Tracing pid 0 tid 0 td 0xffffffff80c1bba0
pmap_invalidate_cache_range() at pmap_invalidate_cache_range+0x43
pmap_change_attr_locked() at pmap_change_attr_locked+0x368
pmap_change_attr() at pmap_change_addr+0x43
pmap_mapdev_attr() at pmap_mapdev_attr+0x112
lapic_init() at lapic_init+0x29
madt_setup_local() at madt_setup_local+0x26
apic_setup_local() at apic_setup_local+0x13
mi_startup() at mi_startup+0x59
btext() at btext+0x2c
Booting with ACPI disabled gets me further into the boot, but dies similarly in pmap_invalidate_cache_range when nexus_activate_resource() tries to map an address in.
>How-To-Repeat:
Boot FreeBSD 8.0-BETA4 DVD in a XenServer instance
>Fix:
n/a
>Release-Note:
>Audit-Trail:
>Unformatted:
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