Running `sysctl -a` causes crash (Hyper-V)
Sergey Kandaurov
pluknet at gmail.com
Mon Nov 11 16:21:09 UTC 2013
On 11 November 2013 20:00, Roger Pau Monné <roger.pau at citrix.com> wrote:
> On 11/11/13 15:31, Sergey Kandaurov wrote:
>> On 11 November 2013 18:13, Pavel Timofeev <timp87 at gmail.com> wrote:
>>> [...]
>>> (kgdb) p vm_guest
>>> $1 = 3
>>> Current language: auto; currently minimal
>>> (kgdb)
>>>
>>
>> What if you try this change?
>>
>> Index: sys/kern/subr_param.c
>> ===================================================================
>> --- sys/kern/subr_param.c (revision 257695)
>> +++ sys/kern/subr_param.c (working copy)
>> @@ -153,6 +153,7 @@
>> "none",
>> "generic",
>> "xen",
>> + "hv",
>> NULL
>> };
>
> This is my fault, I've added VM_GUEST_HV to the guest type enum without
> knowing there was another array in a completely different file that
> contained a description for those values.
Ok, I committed the fix in r257996.
>
> If you (or someone else) are going to commit this change, I would
> recommend adding a BIG comment in sys/systm.h above the declaration of
> VM_GUEST explaining that if you add a new guest type there you also need
> to add a description in subr_param.c, this will probably prevent
> something like this happening again.
>
What about this change?
Index: sys/sys/systm.h
===================================================================
--- sys/sys/systm.h (revision 257695)
+++ sys/sys/systm.h (working copy)
@@ -70,6 +70,7 @@
* Detected virtual machine guest types. The intention is to expand
* and/or add to the VM_GUEST_VM type if specific VM functionality is
* ever implemented (e.g. vendor-specific paravirtualization features).
+ * Keep in sync with vm_guest_sysctl_names[].
*/
enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN, VM_GUEST_HV };
--
wbr,
pluknet
More information about the freebsd-virtualization
mailing list