net: dqs: add NIC stall detector based on BQL

[linux-2.6-block.git] / Documentation / ABI / testing / sysfs-class-net-queues

diff --git a/Documentation/ABI/testing/sysfs-class-net-queues b/Documentation/ABI/testing/sysfs-class-net-queues
index 5bff64d256c207c8a7d2c915e0e8affac191913c..84aa25e0d14d128e8ddd58166a95cdc9496c61ff 100644 (file)
--- a/Documentation/ABI/testing/sysfs-class-net-queues
+++ b/Documentation/ABI/testing/sysfs-class-net-queues
@@ -96,3 +96,26 @@ Description:
                Indicates the absolute minimum limit of bytes allowed to be
                queued on this network device transmit queue. Default value is
                0.
+
+What:          /sys/class/net/<iface>/queues/tx-<queue>/byte_queue_limits/stall_thrs
+Date:          Jan 2024
+KernelVersion: 6.9
+Contact:       netdev@vger.kernel.org
+Description:
+               Tx completion stall detection threshold in ms. Kernel will
+               guarantee to detect all stalls longer than this threshold but
+               may also detect stalls longer than half of the threshold.
+
+What:          /sys/class/net/<iface>/queues/tx-<queue>/byte_queue_limits/stall_cnt
+Date:          Jan 2024
+KernelVersion: 6.9
+Contact:       netdev@vger.kernel.org
+Description:
+               Number of detected Tx completion stalls.
+
+What:          /sys/class/net/<iface>/queues/tx-<queue>/byte_queue_limits/stall_max
+Date:          Jan 2024
+KernelVersion: 6.9
+Contact:       netdev@vger.kernel.org
+Description:
+               Longest detected Tx completion stall. Write 0 to clear.