Date: Mon, 31 May 2021 05:20:04 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256280 Bug ID: 256280 Summary: FreeBSD nfsd serving zfs pool, linux nfsclient, often hangs (not observed in 12-stable) Product: Base System Version: 13.0-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: misc Assignee: bugs@FreeBSD.org Reporter: firstname.lastname@example.org I am observing frequent nfs mount hang-ups after upgrading my NAS to 13-stable. FreeBSD here serves nfsd of a zfs pool. A Gentoo Linux box is connected to this NAS via a 10GbE fiber link. Once a while, perhaps when the zfs load gets high (afpd is running), the Linux side access to nfs hangs, then recovers after a few minutes. The following messages are printed in Linux's dmesg: May 30 22:04:34 mayhome kernel: nfs: server 192.168.3.51 not responding, still trying But after a while, a few minutes or so, the access recovers: May 30 22:06:35 mayhome kernel: nfs: server 192.168.3.51 OK This behavior is only observed after updating NAS to 13-stable via buildworld, buildkernel procedure. The Linux side remains the same and no hardware changed on either side. 12-stable did not exhibit any of these. The NAS's NIC serving nfsd is t5nex0: <Chelsio T520-SO> mem 0xdd300000-0xdd37ffff,0xdc000000-0xdcffffff,0xdd884000-0xdd885fff irq 16 at device 0.4 on pci1 cxl0: <port 0> on t5nex0 cxl0: Ethernet address: 00:07:43:31:9c:80 cxl0: 8 txq, 8 rxq (NIC); 8 txq (TOE), 2 rxq (TOE) cxl1: <port 1> on t5nex0 cxl1: Ethernet address: 00:07:43:31:9c:88 cxl1: 8 txq, 8 rxq (NIC); 8 txq (TOE), 2 rxq (TOE) t5nex0: PCIe gen2 x8, 2 ports, 22 MSI-X interrupts, 54 eq, 21 iq Linux nfsmount flags: /home from 192.168.3.51:/mnt/nashome Flags: rw,relatime,vers=3,rsize=131072,wsize=131072,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.3.51,mountvers=3,mountport=855,mountproto=udp,local_lock=all,addr=192.168.3.51 -- You are receiving this mail because: You are the assignee for the bug.