Date: Mon, 6 Mar 2000 12:00:04 -0800 (PST) From: Rahul Dhesi <dhesi@rahul.net> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/17122: crash due to: softdep_disk_write_complete: lock is held Message-ID: <200003062000.MAA19134@freefall.freebsd.org>
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The following reply was made to PR kern/17122; it has been noted by GNATS.
From: Rahul Dhesi <dhesi@rahul.net>
To: Cy Schubert - ITSD Open Systems Group <Cy.Schubert@uumail.gov.bc.ca>
Cc: freebsd-gnats-submit@FreeBSD.org
Subject: Re: kern/17122: crash due to: softdep_disk_write_complete: lock is held
Date: Mon, 06 Mar 2000 11:57:42 -0800
The load on that machine is fairly even and light. It has some shell
users, and is our primary machine for handling incoming mail (running
Postfix, which is very resource-efficient). It also runs two squid
proxies. All of these things cause a steady (light) CPU load and a
steady (active) I/O load. Output from iostat and vmstat at this time
(below) is I suspect typical of the machine throughout the day.
BTW, the only significant change that occurred after which I began seeing
the crashes was the deployment of the squid proxies.
Rahul
# iostat 5
tty da0 fd0 pass0 cpu
tin tout KB/t tps MB/s KB/t tps MB/s KB/t tps MB/s us ni sy in id
6 202 8.00 128 1.00 0.00 0 0.00 0.00 0 0.00 4 0 2 1 93
20 98 5.40 13 0.07 0.00 0 0.00 0.00 0 0.00 9 0 4 1 87
9 332 6.09 13 0.08 0.00 0 0.00 0.00 0 0.00 13 0 6 0 80
7 275 5.74 4 0.02 0.00 0 0.00 0.00 0 0.00 1 0 2 0 97
8 195 5.14 14 0.07 0.00 0 0.00 0.00 0 0.00 12 0 4 0 83
10 261 7.11 4 0.02 0.00 0 0.00 0.00 0 0.00 1 0 0 0 98
^C
# uptime
11:47AM up 4 days, 13:32, 17 users, load averages: 0.78, 0.37, 0.24
# vmstat 5
procs memory page disks faults cpu
r b w avm fre flt re pi po fr sr da0 fd0 pa0 in sy cs us sy id
0 2 0 111540 42212 263 0 0 0 88 33 0 0 0 283 634 135 4 3 93
1 2 0 111564 42144 232 0 0 0 165 0 6 0 0 258 709 157 8 4 88
1 2 0 112168 40376 691 0 8 0 467 0 22 0 0 324 2215 476 20 9 71
0 2 0 112584 40224 298 0 1 0 213 0 14 0 0 279 1463 358 10 5 86
^C
> Date: Mon, 06 Mar 2000 06:53:42 -0800
> From: Cy Schubert - ITSD Open Systems Group <Cy.Schubert@uumail.gov.
***bc.ca>
> How busy is your server at the time of the panic? I'd be interested to
> see some vmstat and iostat output at the time of the crash.
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