Date: Wed, 10 Jul 2013 05:49:03 -0500 From: Bryan Drewery <bryan-lists@shatow.net> To: freebsd-fs@FreeBSD.org, FreeBSD Current <freebsd-current@freebsd.org> Subject: NFS panic: newnfs_copycred: negative nfsc_ngroups (client HEAD r253033, server 9.1-R) Message-ID: <51DD3C1F.1000609@shatow.net>
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I received this panic on the client while doing heavy parallel reads/writes over NFS. I only recently moved these files to NFS, so I don't know whether or not it's a recent regression. Client: HEAD r253033 Server: 9.1-R core.txt: http://people.freebsd.org/~bdrewery/nfs.txt fstab of related paths: > tank:/tank/distfiles/freebsd /mnt/distfiles nfs rw,bg,noatime,intr,rsize=65536,wsize=65536,readahead=8,nfsv4 0 0 > tank:/usr/packages/ /mnt/all-packages nfs rw,bg,noatime,soft,retrycnt=3,rsize=65536,wsize=65536,readahead=8,nfsv4 0 0 Server: params on these paths: -maproot=root -network 10.10.0.0/16 tcpdump at the time: > 21:43:05.396585 IP 10.10.0.7.4180315003 > 10.10.0.5.2049: 168 getattr fh 0,4/2 > 21:43:05.396589 IP 10.10.0.5.2049 > 10.10.0.7.946: Flags [.], seq 48265029:48266477, ack 4394885, win 29124, options [nop,nop,TS val 1950216660 ecr 596674], length 1448 > 21:43:05.396603 IP 10.10.0.5.2049 > 10.10.0.7.946: Flags [.], seq 48266477:48267925, ack 4394885, win 29124, options [nop,nop,TS val 1950216660 ecr 596674], length 1448 > 21:43:05.396605 IP 10.10.0.7.946 > 10.10.0.5.2049: Flags [.], ack 48266477, win 3916, options [nop,nop,TS val 596674 ecr 1950216660], length 0 > 21:43:05.396608 IP 10.10.0.5.2049 > 10.10.0.7.946: Flags [.], seq 48267925:48269373, ack 4394885, win 29124, options [nop,nop,TS val 1950216660 ecr 596674], length 1448 > 21:43:05.396621 IP 10.10.0.5.2049 > 10.10.0.7.946: Flags [.], seq 48269373:48270821, ack 4394885, win 29124, options [nop,nop,TS val 1950216660 ecr 596674], length 1448 > 21:43:05.396624 IP 10.10.0.7.946 > 10.10.0.5.2049: Flags [.], ack 48269373, win 3870, options [nop,nop,TS val 596674 ecr 1950216660], length 0 > 21:43:05.396641 IP 10.10.0.5.2049 > 10.10.0.7.946: Flags [.], seq 48270821:48272269, ack 4394885, win 29124, options [nop,nop,TS val 1950216660 ecr 596674], length 1448 > 21:43:05.396653 IP 10.10.0.5.2049 > 10.10.0.7.946: Flags [.], seq 48272269:48273717, ack 4394885, win 29124, options [nop,nop,TS val 1950216660 ecr 596674], length 1448 > 21:43:05.396656 IP 10.10.0.7.946 > 10.10.0.5.2049: Flags [.], ack 48272269, win 3825, options [nop,nop,TS val 596674 ecr 1950216660], length 0 > 21:43:05.396659 IP 10.10.0.5.2049 > 10.10.0.7.946: Flags [.], seq 48273717:48275165, ack 4394885, win 29124, options [nop,nop,TS val 1950216660 ecr 596674], length 1448 > 21:43:05.396671 IP 10.10.0.5.2049 > 10.10.0.7.946: Flags [.], seq 48275165:48276613, ack 4394885, win 29124, options [nop,nop,TS val 1950216660 ecr 596674], length 1448 > 21:43:05.396674 IP 10.10.0.7.946 > 10.10.0.5.2049: Flags [.], ack 48275165, win 3780, options [nop,nop,TS val 596674 ecr 1950216660], length 0 > 21:43:05.396676 IP 10.10.0.5.2049 > 10.10.0.7.946: Flags [.], seq 48276613:48278061, ack 4394885, win 29124, options [nop,nop,TS val 1950216660 ecr 596674], length 1448 > 21:43:05.396689 IP 10.10.0.5.2049 > 10.10.0.7.946: Flags [.], seq 48278061:48279509, ack 4394885, win 29124, options [nop,nop,TS val > Write failed: Broken pipe I have nfsuserd running on both client/server. nfscbd is running. nfs_client_enable=yes in rc.conf. User lookups seem to work fine: > -rw-r--r-- 1 root bryan 1554804 Jul 6 10:50 /mnt/distfiles/pkg-1.1.4.tar.xz I ran a find -ls on these paths and all files return a user/group. I am guessing there is a race condition with files being written and looking up the associated groups. -- Regards, Bryan Drewery bdrewery@freenode/EFNet
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