Re: NFS over RDMA issues on Linux 5.4

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




> On Aug 4, 2020, at 9:46 AM, Leon Romanovsky <leon@xxxxxxxxxx> wrote:
> 
> On Tue, Aug 04, 2020 at 09:12:55AM -0400, Chuck Lever wrote:
>> 
>> 
>>> On Aug 4, 2020, at 9:08 AM, Timo Rothenpieler <timo@xxxxxxxxxxxxxxxx> wrote:
>>> 
>>> On 04.08.2020 14:49, Chuck Lever wrote:
>>>> Timo, I tend to think this is not a configuration issue.
>>>> Do you know of a known working kernel?
>>> 
>>> This is a brand new system, it's never been running with any kernel older than 5.4, and downgrading it to 4.19 or something else while in operation is unfortunately not easily possible. For a client it would definitely not be out of the question, but the main nfs server I cannot easily downgrade.
>>> 
>>> Also keep in mind that the dmesg spam happens on both server and client simultaneously.
>> 
>> Let's start with the client only, since restarting it seems to clear the problem.
> 
> It is client because according to the server CQE errors, it is Remote_Invalid_Request_Error
> with "9.7.5.2.2 NAK CODES" from IBTA.

Thanks! OK, then let's use ftrace.

Timo, can you install trace-cmd on your client? Then:

1. # trace-cmd record -e rpcrdma -e sunrpc

2. Trigger the problem

3. Control-C the trace-cmd, and copy the trace.dat file to another system

4. reboot your client

Then send me your trace.dat. You don't have to cc the mailing lists.


--
Chuck Lever







[Index of Archives]     [Linux Filesystem Development]     [Linux USB Development]     [Linux Media Development]     [Video for Linux]     [Linux NILFS]     [Linux Audio Users]     [Yosemite Info]     [Linux SCSI]

  Powered by Linux