Re: NFS over RDMA issues on Linux 5.4

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> On Aug 4, 2020, at 9:19 AM, Timo Rothenpieler <timo@xxxxxxxxxxxxxxxx> wrote:
> 
> On 04.08.2020 15:12, 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.
>>> I'll see if I can borrow two of the nodes to turn into a temporary test system for this.
>>> 
>>> The Kernel for this system is self-built and not any distribution kernel.
>> Would it be easy to try a kernel earlier in the 5.4.y stable series?
> 
> Yes, that should be very straight forward, since I can just use the same config.
> Got any specific version in mind?

Start with an early one, like 5.4.16.


--
Chuck Lever







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