Date: Tue, 3 Dec 2019 15:57:27 +0100 From: Hans Petter Selasky <hps@selasky.org> To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, Matthew Macy <mmacy@freebsd.org> Subject: [IFLIB] When system runs out of mbufs incoming network traffic stops entirely Message-ID: <f0bd0ce8-df67-7bf8-7525-987e30b81a47@selasky.org>
index | next in thread | raw e-mail
Hi, It appears iflib has a little defect. When the system temporarily runs out of mbufs, iflib based network drivers stop receiving packets forever, even when the mbuf zone recover. In mlx5en(4) which doesn't use iflib we have a special watchdog/callout to retry filling the RX DMA ring when we are out of mbufs. Can iflib do the same? > [zone: mbuf_cluster] kern.ipc.nmbclusters limit reached Simply doing "ifconfig down" and "ifconfig up" recovers the adapter: > igb0: link state changed to DOWN > igb0: link state changed to UP --HPShome | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?f0bd0ce8-df67-7bf8-7525-987e30b81a47>