patch 'dts: avoid resources conflict on quick stop/start' has been queued to stable release 25.11.1

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 25.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/31/26. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/762e28acfd1cd507923f30ec7520bb3143ef9610

Thanks.

Kevin

---
>From 762e28acfd1cd507923f30ec7520bb3143ef9610 Mon Sep 17 00:00:00 2001
From: Patrick Robb <probb at iol.unh.edu>
Date: Mon, 23 Mar 2026 20:52:41 -0400
Subject: [PATCH] dts: avoid resources conflict on quick stop/start

[ upstream commit 874312e2616f6453e88429c6b404e9253caa2477 ]

When starting and stopping DPDK applications in rapid succession,
there may be a resource conflicts on ports, memory, VFIO, etc.
Even after we send "quit" to the testpmd CLI, some resource
cleanup will happen asynchronously in the background. To avoid a
resource conflict upon starting a subsequent DPDK application,
add a very brief sleep after quitting DPDK applications.

Fixes: bfad0948df75 ("dts: rework interactive shells")

Signed-off-by: Patrick Robb <probb at iol.unh.edu>
Reviewed-by: Andrew Bailey <abailey at iol.unh.edu>
Tested-by: Andrew Bailey <abailey at iol.unh.edu>
---
 dts/api/testpmd/__init__.py                |  2 +-
 dts/framework/remote_session/dpdk_shell.py | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/dts/api/testpmd/__init__.py b/dts/api/testpmd/__init__.py
index 703cae487e..e9187440bb 100644
--- a/dts/api/testpmd/__init__.py
+++ b/dts/api/testpmd/__init__.py
@@ -1175,5 +1175,5 @@ class TestPmd(DPDKShell):
     @only_active
     def close(self) -> None:
-        """Overrides :meth:`~.interactive_shell.close`."""
+        """Overrides :meth:`~.dpdk_shell.close`."""
         self.stop()
         self.send_command("quit", "Bye...")
diff --git a/dts/framework/remote_session/dpdk_shell.py b/dts/framework/remote_session/dpdk_shell.py
index 51b97d4ff6..269c2cada4 100644
--- a/dts/framework/remote_session/dpdk_shell.py
+++ b/dts/framework/remote_session/dpdk_shell.py
@@ -7,4 +7,5 @@ Provides a base class to create interactive shells based on DPDK.
 """
 
+import time
 from abc import ABC, abstractmethod
 from pathlib import PurePath
@@ -14,4 +15,5 @@ from framework.params.eal import EalParams
 from framework.remote_session.interactive_shell import (
     InteractiveShell,
+    only_active,
 )
 from framework.testbed_model.cpu import LogicalCoreList
@@ -85,2 +87,11 @@ class DPDKShell(InteractiveShell, ABC):
         """
         return get_ctx().dpdk_build.remote_dpdk_build_dir.joinpath(self.path)
+
+    @only_active
+    def close(self) -> None:
+        """Overrides :meth:`~.interactive_shell.close`."""
+        # Allow time for VFIO and hardware resources to be released by the kernel after the
+        # DPDK process exits. Without this delay, sequential testpmd instances may have EAL
+        # errors when trying to acquire the same devices.
+        time.sleep(1)
+        return super().close()
-- 
2.53.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2026-03-27 09:58:26.935249780 +0000
+++ 0027-dts-avoid-resources-conflict-on-quick-stop-start.patch	2026-03-27 09:58:26.152625508 +0000
@@ -1 +1 @@
-From 874312e2616f6453e88429c6b404e9253caa2477 Mon Sep 17 00:00:00 2001
+From 762e28acfd1cd507923f30ec7520bb3143ef9610 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 874312e2616f6453e88429c6b404e9253caa2477 ]
+
@@ -14 +15,0 @@
-Cc: stable at dpdk.org