From: Chuck Lever <chuck.lever@xxxxxxxxxx>
On Fri, 11 Apr 2025 10:22:14 -0400, Jeff Layton wrote:
> I've been looking at a problem where we see increased RPC timeouts in
> clients when the nfs_layout_flexfiles dataserver_timeo value is tuned
> very low (6s). This is necessary to ensure quick failover to a different
> mirror if a server goes down, but it causes a lot more major RPC timeouts.
>
> Ultimately, the problem is server-side however. It's sometimes doesn't
> respond to connection attempts. My theory is that the interrupt handler
> runs when a connection comes in, the xprt ends up being enqueued, but it
> takes a significant amount of time for the nfsd thread to pick it up.
>
> [...]
Applied to nfsd-testing, thanks!
[1/1] sunrpc: add info about xprt queue times to svc_xprt_dequeue tracepoint
commit: b7a6405d13bb2b5cbf89decb111f84408d121dc9
--
Chuck Lever
