This is a note to let you know that I've just added the patch titled [PATCH 014/135] ixgbe: Fix handling of NAPI budget when multiple to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: 0014-ixgbe-Fix-handling-of-NAPI-budget-when-multiple-queu.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 280b3ddc982e0cfc9f508d24ad0d465912591c53 Mon Sep 17 00:00:00 2001 From: Alexander Duyck <aduyck@xxxxxxxxxxxx> Date: Tue, 22 Sep 2015 14:35:41 -0700 Subject: [PATCH 014/135] ixgbe: Fix handling of NAPI budget when multiple queues are enabled per vector [ Upstream commit 5d6002b7b822c7423e75d4651e6790bfb5642b1b ] This patch corrects an issue in which the polling routine would increase the budget for Rx to at least 1 per queue if multiple queues were present. This would result in Rx packets being processed when the budget was 0 which is meant to indicate that no Rx can be handled. Signed-off-by: Alexander Duyck <aduyck@xxxxxxxxxxxx> Tested-by: Darin Miller <darin.j.miller@xxxxxxxxx> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@xxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -2786,7 +2786,8 @@ int ixgbe_poll(struct napi_struct *napi, ixgbe_for_each_ring(ring, q_vector->tx) clean_complete &= !!ixgbe_clean_tx_irq(q_vector, ring); - if (!ixgbe_qv_lock_napi(q_vector)) + /* Exit if we are called by netpoll or busy polling is active */ + if ((budget <= 0) || !ixgbe_qv_lock_napi(q_vector)) return budget; /* attempt to distribute budget to each queue fairly, but don't allow Patches currently in stable-queue which might be from aduyck@xxxxxxxxxxxx are queue-4.4/0014-ixgbe-Fix-handling-of-NAPI-budget-when-multiple-queu.patch queue-4.4/0025-fm10k-Cleanup-exception-handling-for-mailbox-interru.patch queue-4.4/0020-fm10k-Fix-handling-of-NAPI-budget-when-multiple-queu.patch queue-4.4/0024-fm10k-Cleanup-MSI-X-interrupts-in-case-of-failure.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html