Re: Re: [BUG] NFSv4.1 client hang in nfs4_drain_slot_tbl under concurrent workload against Windows NFS server

[郭玲兴]

Hi Lionel,

Thanks for your response.

Here are the details:

1. Windows Server version:
Microsoft Windows Server 2022
Version 10.0.20348.587

2. User accounts:
No mapping mechanism is configured.
No AD, LDAP, or passwd mapping is used.

Unmapped users are handled by the default "Everyone" account.

3. Authentication:
sec=sys (AUTH_SYS), as reported by nfsstat -m

4. CPU architecture:
- Linux clients: x86_64
- Windows server: x86_64 (64-bit OS)

5. Memory:
Each Linux client VM has 16GB RAM

Thanks.


> -----原始邮件-----
> 发件人: "Lionel Cons" <lionelcons1972@xxxxxxxxx>
> 发送时间:2026-05-06 21:28:33 (星期三)
> 收件人: 郭玲兴 <guolingxing@xxxxxxxxxx>, linux-nfs@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
> 主题: Re: [BUG] NFSv4.1 client hang in nfs4_drain_slot_tbl under concurrent workload against Windows NFS server
> 
> On Wed, 6 May 2026 at 09:49, 郭玲兴 <guolingxing@xxxxxxxxxx> wrote:
> >
> > Hi,
> >
> >
> > We encountered a reproducible NFSv4.1 client hang issue under concurrent workload.
> >
> >
> > Environment:
> > - Two independent Linux clients (VMs)
> > - Both mount the same Windows NFS server (NFSv4.1)
> > - Kernel version: 6.1.78
> > - Mount options: vers=4.1,soft,proto=tcp,timeo=60,retrans=10
> 
> Which version of WindowsServer do you use, e.g what does the "ver"
> command in cmd.exe output? How did you set up the user accounts, and
> which authentication (AUTH_SYS, GSS, ...) do you use?
> Which CPU architecture do you use? How much memory do you have on the
> Linux NFS client?
> 
> Lionel