Re: [Xen-users] FreeBSD PVHVM call for testing

[Roger Pau Monnà <roger.pau@xxxxxxxxxx>]

On 21/06/13 19:55, Miguel Clara wrote:
> Roger Pau Monnà <roger.pau <at> citrix.com> writes:
> 
>>
>> Hello,
>>
>> I've pushed a new branch, pvhvm_v10 that contains a PV IPI
>> implementation for both amd64 and i386. I've also updated the wiki to
>> point to the pvhvm_v10 branch:
>>
>> http://xenbits.xen.org/gitweb/?p=people/royger/
> freebsd.git;a=shortlog;h=refs/heads/pvhvm_v10
>>
>> I've updated my tree to latest HEAD, so now branch pvhvm_v10 is on top
>> of this commit:
>>
>> commit b44da0fb82647f2cfb06f65a6695c7e36c98828c
>> Author: gber <gber <at> FreeBSD.org>
>> Date:   Thu May 23 12:24:46 2013 +0000
>>
>>     Rework and organize pmap_enter_locked() function.
>>
>>     pmap_enter_locked() implementation was very ambiguous and confusing.
>>     Rearrange it so that each part of the mapping creation is separated.
>>     Avoid walking through the redundant conditions.
>>     Extract vector_page specific PTE setup from normal PTE setting.
>>
>>     Submitted by:   Zbigniew Bodek <zbb <at> semihalf.com>
>>     Sponsored by:   The FreeBSD Foundation, Semihalf
>>
>> Thanks for the testing, Roger.
>>
> 
> Have you (or anyone) done some testing under NetBSD Dom0? I guess its not 
> related, but I'm getting a panic when using SSH.
> 
> I was able to compile and install the kernel, and booted fine (just needed 
> to adapt fstab, other than that no issues).
> 
> I've done some tests with ping, ftp, wget, but when I tried SSH (both to 
> the vm and from the vm, I got a panic)
> 
> ===== PANIC ====
> xn_txeof: WARNING: response is -1!
> debug1: SSH2_MSGxn_txeof: WARNING: response is -1!
> _KEXINIT receivepanic: mbuf already on the free list, but we're trying to 
> free it again!
> cpuid = 0
> KDB: enter: panic
> [ thread pid 12 tid 100039 ]
> Stopped at      kdb_enter+0x3e: movq    $0,kdb_why
> db> bt
> Tracing pid 12 tid 100039 td 0xfffffe0008101000
> kdb_enter() at kdb_enter+0x3e/frame 0xffffff8095021940
> vpanic() at vpanic+0x146/frame 0xffffff8095021980
> kassert_panic() at kassert_panic+0x136/frame 0xffffff80950219f0
> xn_txeof() at xn_txeof+0x99/frame 0xffffff8095021a40
> xn_intr() at xn_intr+0x59/frame 0xffffff8095021b30
> intr_event_execute_handlers() at intr_event_execute_handlers+0x90/frame 
> 0xffffff8095021b70
> ithread_loop() at ithread_loop+0x148/frame 0xffffff8095021bb0
> fork_exit() at fork_exit+0x84/frame 0xffffff8095021bf0
> fork_trampoline() at fork_trampoline+0xe/frame 0xffffff8095021bf0
> --- trap 0, rip = 0, rsp = 0xffffff8095021cb0, rbp = 0 ---
> db> 
> 
> == PANIC ===
> 
> 
> I've tried with pvhvm_v10 first, and now with pvhvm_v17, but give me the 
> panic!

Just to make things clear, this is when using a FreeBSD PVHVM DomU with
a NetBSD Dom0 right? and the crash happens in the FreeBSD DomU?

Could you try to run a FreeBSD HVM (HEAD) guest without my patches and
see if it also crashes? (just to know if this is a regression introduced
in my series or a bug that was already there).

Roger.


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