Date: Sun, 1 Mar 1998 10:36:38 -0500 (EST) From: Brian Tao <taob@nbc.netcom.ca> To: FREEBSD-CURRENT <freebsd-current@FreeBSD.ORG> Subject: Lockup in inode/nfsrcv on loopback NFS mount Message-ID: <Pine.GSO.3.95.980228233143.22812B-100000@tor-adm1>
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Could someone with a recent -current (I'm using Feb 28's) try exporting a filesystem, mounting it via localhost and copying a large file (a few megabytes will do) to the NFS-mounted filesystem? I've seen results from only NFS locking up, to all filesystems hanging, to the entire system freezing. | # showmount -e | Exports list on localhost: | /usr/local Everyone | | # mount localhost:/usr/local /mnt | # df | Filesystem 1K-blocks Used Avail Capacity Mounted on | /dev/sd0a 98479 19940 70661 22% / | /dev/sd0s2e 148703 71996 64811 53% /usr | /dev/sd0s2f 73855 7499 60448 11% /var | /dev/sd0s2g 1525999 781757 622163 56% /usr/local | /dev/sd0s2h 762991 235510 466442 34% /usr/X11R6 | /dev/sd0s2d 452948 216517 200196 52% /home | procfs 4 4 0 100% /proc | localhost:/usr/local 1525999 781757 622163 56% /mnt | | # cd /mnt/tmp | # dd if=/dev/zero of=blah | ^C^C^C^C At this point, the NFS server processes are waiting in inode, and the client processes are waiting in either getblk or nfsrcv. Syslog does manage to log a few "/kernel: nfs server localhost:/usr/local: not responding". The first sync(8) command (if I can get to a shell) will never exit (waiting on nfsrcv). A truss on the hung process shows the last call was a write(). I don't have another machine here to try NFS over Ethernet, nor a machine with a different -current to try another loopback NFS mount. UID PID PPID CPU PRI NI VSZ RSS WCHAN STAT TT TIME COMMAND 0 0 0 0 -18 0 0 0 sched DLs ?? 0:00.01 (swapper) 0 1 0 0 10 0 484 132 wait Is ?? 0:00.03 /sbin/init -- 0 2 0 0 -18 0 0 0 psleep DL ?? 0:01.12 (pagedaemon) 0 3 0 0 28 0 0 0 psleep DL ?? 0:00.00 (vmdaemon) 0 4 0 0 28 0 0 0 update DL ?? 0:00.03 (update) 0 100 1 0 2 0 768 360 select Is ?? 0:00.10 syslogd 1 110 1 0 2 0 752 320 select Is ?? 0:00.01 portmap 0 118 1 0 2 0 464 148 select Is ?? 0:00.02 mountd -r 0 121 1 25 2 0 312 64 accept Is ?? 0:00.01 nfsd: master (nfsd) 0 125 121 0 -14 0 292 44 inode D ?? 0:00.00 nfsd: server (nfsd) 0 126 121 0 -14 0 292 44 inode D ?? 0:00.00 nfsd: server (nfsd) 0 127 121 19 -1 0 292 44 nfsrcv D ?? 0:02.03 nfsd: server (nfsd) 0 128 121 5 -14 0 292 44 inode D ?? 0:01.35 nfsd: server (nfsd) 0 132 1 9 2 0 204 16 sbwait D ?? 0:01.11 nfsiod -n 4 0 133 1 0 -1 0 204 16 nfsrcv D ?? 0:00.74 nfsiod -n 4 0 134 1 0 -1 0 204 16 nfsrcv D ?? 0:00.00 nfsiod -n 4 0 135 1 0 -1 0 204 16 nfsrcv D ?? 0:00.00 nfsiod -n 4 0 150 1 0 10 0 920 404 nanslp Is ?? 0:00.04 cron 0 154 1 77 18 0 1144 392 pause Is ?? 0:00.01 /usr/sbin/sendmail -q30m 0 196 1 59 2 0 1004 324 accept Is ?? 0:02.23 /usr/local/sbin/sshd 0 252 251 1 2 0 3516 1188 select Ss ?? 0:01.86 SCREEN (screen) 1000 253 252 0 18 0 1304 676 pause Is p1 0:00.34 -usr/local/bin/tcsh 1000 269 253 5 10 0 760 308 piocwa I+ p1 0:00.12 truss cp yamato.the-birth.mp3 blah 1000 270 269 8 -5 0 272 40 getblk D+ p1 0:00.19 cp yamato.the-birth.mp3 1000 255 252 5 18 0 1300 548 pause Is p2 0:00.28 -usr/local/bin/tcsh 1000 257 255 1 2 0 1512 564 select S+ p2 0:01.93 top 1000 256 252 0 18 0 1308 944 pause Ss p3 0:00.55 -usr/local/bin/tcsh 1000 273 256 1 -1 0 136 8 nfsrcv D p3 0:00.01 sync 1000 298 256 1 28 0 668 276 - R+ p3 0:00.00 ps -lax -- Brian Tao (BT300, taob@netcom.ca) "Though this be madness, yet there is method in't" To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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