svn commit: r319722 - in head: sys/cam/ctl sys/dev/iscsi sys/kern sys/netgraph sys/netgraph/bluetooth/socket sys/netinet sys/ofed/drivers/infiniband/core sys/ofed/drivers/infiniband/ulp/sdp sys/rpc...

[Andreas Tobler]

On 15.06.17 07:00, Gleb Smirnoff wrote:
>    Hi,
> 
> On Wed, Jun 14, 2017 at 09:59:50AM +0200, Andreas Tobler wrote:
> A> with this revision I get either a kernel panic or a hang. This happens
> A> on powerpc (32-bit). The powerpc64 looks stable.
> A>
> A> Here you can see the backtrace in case of the panic:
> A> https://people.freebsd.org/~andreast/r319722_ppc32_1.jpg
> A>
> A> In the source code I see a comment with XXXGL...
> A> Is this powerpc specific or do you think that there are some issues in
> A> the uipc_socket.c code?
> 
> The comment has nothing to do with arch or 32-bit. Is
> it possible to understand what is the actual instruction
> at soisconnected()+0x21c ?
> 

(gdb) p /x 0x5a5808 + 0x21c
$2 = 0x5a5a24

005a5808 <soisconnected>:
   5a5808:       94 21 ff c0     stwu    r1,-64(r1)
   5a580c:       7c 08 02 a6     mflr    r0
   5a5810:       93 01 00 20     stw     r24,32(r1)

....

   5a5a0c:       39 40 00 00     li      r10,0
   5a5a10:       2f 8a 00 00     cmpwi   cr7,r10,0
   5a5a14:       40 9e 00 0c     bne     cr7,5a5a20 <soisconnected+0x218>
   5a5a18:       38 7c 00 10     addi    r3,r28,16
   5a5a1c:       4b f1 c4 61     bl      4c1e7c <__mtx_unlock_sleep>
   5a5a20:       7f 63 db 78     mr      r3,r27
->5a5a24:       4b ff f5 9d     bl      5a4fc0 <solisten_wakeup>
   5a5a28:       48 00 04 80     b       5a5ea8 <soisconnected+0x6a0>
   5a5a2c:       7c 45 13 78     mr      r5,r2
   5a5a30:       39 20 00 04     li      r9,4


I'm going to stress test before 319722 to see if I can confirm Mark's 
comment.

Thanks!
Andreas