Date: Thu, 15 Jan 2004 16:51:22 +1100 From: Lachlan O'Dea <odela01@ca.com> To: freebsd-current@freebsd.org Subject: Processes blocked on ufs or getblk Message-ID: <D90B8DC2-471E-11D8-A84C-000A95DBB47C@ca.com>
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Hi,
I found some discussion about this in December, but I don't think
anyone has been able to get to the bottom of it yet. The symptom is
that processes become permanently blocked in a state of ufs or getblk.
I can reproduce it with find at will:
% ps axl | grep ufs
0 13225 13215 1 -4 0 1300 804 ufs D ?? 0:00.96 find
/var -xdev -type f ( -perm -u+x -or -perm -g+x -or -perm -o+
0 28778 28765 0 -4 0 1300 804 ufs D ?? 0:00.97 find
/var -xdev -type f ( -perm -u+x -or -perm -g+x -or -perm -o+
0 33017 32933 2 -4 0 1304 788 ufs D p2- 0:10.69 find
/ -name samba
It has also happened several times in single user mode to makewhatis
running at the end of installworld.
System details: 5.2-RC FreeBSD 5.2-RC #1: Fri Jan 9 04:45:51 EST 2004.
Dell PowerEdge 2500. All filesystems are on a single raid 5 volume
using the aac driver. The box has two CPUs, but I'm currently running
with kern.smp.disabled=1.
% mount
/dev/aacd0s1a on / (ufs, local)
devfs on /dev (devfs, local)
/dev/aacd0s1e on /usr (ufs, local, with quotas, soft-updates)
/dev/aacd0s1d on /var (ufs, local, soft-updates)
procfs on /proc (procfs, local)
linprocfs on /usr/compat/linux/proc (linprocfs, local)
I also have ACLs enabled on /usr, if that's at all relevant.
The kernel has DDB and DEBUG_LOCKS. Please let me know if there's
anything I can do to help debug this.
I don't know if this is related, but another problem is that when
shutting down, it always gives up on a bunch of buffers. I think I've
seen over 100, but usually it's 4-10 buffers.
- --
Lachlan O'Dea
Computer Associates
Programmer
tel: +61 3 8416 5627
fax: +61 3 8416 5810
mobile: +61 412 390 650
odela01@ca.com
Relax and enjoy your shoes!
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