Hi,
We are seeing something probably related.
We run ethtool on a system with Broadcom NIC to increase number of
combined queues.
[root@ ~]# ethtool -l eth0
Channel parameters for eth0:
Pre-set maximums:
RX: 9
TX: 8
Other: 0
Combined: 17
Current hardware settings:
RX: 0
TX: 0
Other: 0
Combined: 8
[root@ ~]# ethtool -L eth0 combined 16
The last command PANIC the kernel easily (5 out of 5 in my tests).
I haven't got luck to catch much console output, the only line I got is:
[ 504.727865] WARNING: CPU: 10 PID: 0 at kernel/irq/matrix.c:371
irq_matrix_free+0x32/0xd0
The NIC we have is
Broadcom Limited BCM57302 NetXtreme-C 10Gb/25Gb Ethernet Controller
Thanks,
Song
On Wed, May 23, 2018 at 1:49 AM, Thomas Gleixner <t...@linutronix.de> wrote:
> On Wed, 23 May 2018, Tariq Toukan wrote:
>> On 19/05/2018 2:20 PM, Thomas Gleixner wrote:
>> > On Fri, 18 May 2018, Dmitry Safonov wrote:
>> > > I'm not entirely sure that it's the same fault, but at least backtrace
>> > > looks resembling.
>> >
>> > Yes, it's similar, but not the same issue. I'll stare are the code ...
>> >
>> > Thanks,
>> >
>> > tglx
>> >
>>
>> We still see the issue in our daily regression runs.
>> I have your patch merged into my internal branch, it prints the following:
>>
>> [ 4898.226258] Trying to clear prev_vector: 0
>> [ 4898.226439] Trying to clear prev_vector: 0
>>
>> i.e. vector(0) is lower than FIRST_EXTERNAL_VECTOR.
>
> Could you please enable the vector and irq matrix trace points and capture
> the trace when this happens?
>
> Thanks,
>
> tglx
>
