Re: NFS regression between 5.17 and 5.18

[Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>]

On 4/28/22 10:57 AM, Chuck Lever III wrote:
>> On Apr 28, 2022, at 9:05 AM, Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com> wrote:
>>
>> Hi NFS folks,
>>
>> I've noticed a pretty nasty regression in our NFS capability between 5.17 and
>> 5.18-rc1. I've tried to bisect but not having any luck. The problem I'm seeing
>> is it takes 3 minutes to copy a file from NFS to the local disk. When it should
>> take less than half a second, which it did up through 5.17.
>>
>> It doesn't seem to be network related, but can't rule that out completely.
>>
>> I tried to bisect but the problem can be intermittent. Some runs I'll see a
>> problem in 3 out of 100 cycles, sometimes 0 out of 100. Sometimes I'll see it
>> 100 out of 100.
> 
> It's not clear from your problem report whether the problem appears
> when it's the server running v5.18-rc or the client.

That's because I don't know which it is. I'll do a quick test and find out. I
was testing the same kernel across both nodes.

-Denny