Date: Tue, 1 Jul 2003 22:09:26 +0200 From: Jesper Skriver <jesper@FreeBSD.org> To: current@FreeBSD.org Subject: Deadlock between background fsck and cvsup, both stuck in snaplk Message-ID: <20030701200926.GA18556@FreeBSD.org>
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Hi, I recently reinstalled my scratch box, last time I turned it off, I didn't shut it down nicely so when I booted it today the file systems needed a fsck. While bgfsck was still running I started a cvsup to update /usr/ports/, which ran fine for a while, and then stopped, and now both cvsup and fsck are waiting for snaplk The box is running 5.1-CURRENT as of June 8th When it booted it logged this ... da0 at ahc0 bus 0 target 0 lun 0 da0: <IBM DCAS-34330 S65A> Fixed Direct Access SCSI-2 device da0: 20.000MB/s transfers (20.000MHz, offset 15) da0: 4134MB (8467200 512 byte sectors: 255H 63S/T 527C) da1 at ahc1 bus 0 target 0 lun 0 da1: <IBM DORS-32160W WA6A> Fixed Direct Access SCSI-2 device da1: 40.000MB/s transfers (20.000MHz, offset 15, 16bit), Tagged Queueing Enabled da1: 2063MB (4226725 512 byte sectors: 255H 63S/T 263C) Mounting root from ufs:/dev/da0s1a WARNING: / was not properly dismounted /: mount pending error: blocks 4 files 0 WARNING: /usr was not properly dismounted /usr: superblock summary recomputed WARNING: /usr/obj was not properly dismounted WARNING: /var was not properly dismounted acquiring duplicate lock of same type: "vnode interlock" 1st vnode interlock @ /usr/src/sys/ufs/ffs/ffs_snapshot.c:477 2nd vnode interlock @ /usr/src/sys/ufs/ffs/ffs_snapshot.c:480 Stack backtrace: But the backtrace isn't in the output of dmesg nor in /var/log/messages The processes currently waiting for snaplk are olive# ps auxl | grep snaplk root 41 0.0 0.0 0 12 ?? DL 8:47PM 0:01.44 (syncer) 0 0 0 -4 0 snaplk root 496 0.0 1.5 2280 1848 ?? DN 8:49PM 0:08.78 fsck_ufs -p -B / 0 481 0 -4 4 snaplk root 537 0.0 4.2 6192 5280 p0 D 8:53PM 0:34.17 /usr/local/bin/c 0 1 0 -4 0 snaplk root 590 0.0 0.1 328 180 p0 R+ 9:08PM 0:00.01 grep snaplk 0 520 0 108 0 - Any ideas ? /Jesper -- Jesper Skriver, jesper(at)skriver(dot)dk - CCIE #5456 One Unix to rule them all, One Resolver to find them, One IP to bring them all and in the zone to bind them.
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