Re: [PATCH v4 3/3] FSD: Fix NFS server hang when there are multiple layout conflicts

[Dai Ngo <dai.ngo@oracle.com>]

On 11/19/25 1:56 AM, Christoph Hellwig wrote:
> On Sat, Nov 15, 2025 at 12:20:43PM -0800, Dai Ngo wrote:
>> break_lease is called from many places - the NFS client and server,
>> CIFS and VFS. Many of these callers do not handle error returned
>> from break_lease, some don't even check return value from break_lease.
>>
>> Until we fix all callers of break_lease to handle error return, which
>> I think it's much more involved, returning error from break_lease is
>> not possible.
> There is about a dozen callers.  Although some might not want to handle
> this error, having a flags argument to opt into for the callers that
> can and want is entirely reasonable.
>
>> I have plan to post a separate patch to check for layout conflict
>> caused from the same client and skip the recall - same as what's
>> currently done for delegation conflict.
> That would be very useful.

I will work on this first then wait for Jeff's patch to go in then
come back for this server hang problem.

-Dai