Date: Tue, 11 Jan 2011 14:00:29 +0100 From: Miroslav Lachman <000.fbsd@quip.cz> To: Steve Price <steve@freebsd.org> Cc: freebsd-geom@freebsd.org Subject: Re: gmirror panic on RELENG_8 Message-ID: <4D2C546D.8010604@quip.cz> In-Reply-To: <AANLkTik%2B4=UMBob=Sm9tC4LhevkPCt833Fai%2BZkUSO5B@mail.gmail.com> References: <AANLkTik%2B4=UMBob=Sm9tC4LhevkPCt833Fai%2BZkUSO5B@mail.gmail.com>
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Steve Price wrote:
> I installed 8.2-RC1 on a machine with 3 identical drives and got a
> kernel panic when trying to load geom_mirror on boot. Try as I
> might I've been unable to get a coredump so I can investigate further.
>
> Minimum required to reproduce the error here is to install 8.2-RC1
> from CD and on reboot, drop to the boot loader prompt and type:
>
> load geom_mirror
> boot
>
> da0 contains all of the installed files, da1 was to be a mirror of da0
> so was left alone, and da2 was created as one big partition.
>
> I first noticed this when I installed 8.1-RC1 and then ran the following
> commands after rebooting from the initial install:
>
> sysctl kern.geom.debugflags=17
> gmirror label -vb round-robin gm0 /dev/da0
> echo 'geom_mirror_load="YES"'>> /boot/loader.conf
> sed -i.bak -e's,da0,mirror/gm0,g' /etc/fstab
> reboot
>
> When the box came back up I got a panic. I've tried various combos
> to figure out what the minimum was to reproduce this. I've verified
> that 8.0-RELEASE, and 8.1-RELEASE don't exhibit this same behavior.
>
> If further info is required, please let me know.
There must be some odd problem in your case. I am running 8.2-RC1 with
gmirror on production machine without any panic. The system was upgraded
from 7.2.
root@cage ~/# uname -srmi
FreeBSD 8.2-RC1 amd64 GENERIC
root@cage ~/# gmirror status
Name Status Components
mirror/gms1 COMPLETE ad4s1
ad6s1
root@cage ~/# gmirror list
Geom name: gms1
State: COMPLETE
Components: 2
Balance: round-robin
Slice: 4096
Flags: NONE
GenID: 0
SyncID: 1
ID: 3764583301
Providers:
1. Name: mirror/gms1
Mediasize: 21451497472 (20G)
Sectorsize: 512
Mode: r5w5e9
Consumers:
1. Name: ad4s1
Mediasize: 21451497984 (20G)
Sectorsize: 512
Mode: r1w1e1
State: ACTIVE
Priority: 0
Flags: NONE
GenID: 0
SyncID: 1
ID: 1333090696
2. Name: ad6s1
Mediasize: 21451497984 (20G)
Sectorsize: 512
Mode: r1w1e1
State: ACTIVE
Priority: 0
Flags: NONE
GenID: 0
SyncID: 1
ID: 1584887928
root@cage ~/# kldstat
Id Refs Address Size Name
1 21 0xffffffff80100000 da0458 kernel
2 1 0xffffffff80ea1000 21068 geom_mirror.ko
3 1 0xffffffff81022000 104a7a zfs.ko
4 1 0xffffffff81127000 1a22 opensolaris.ko
5 1 0xffffffff81129000 57d7 if_bridge.ko
6 1 0xffffffff8112f000 3536 bridgestp.ko
7 1 0xffffffff81133000 264e if_tap.ko
8 1 0xffffffff81136000 2bd81 pf.ko
9 1 0xffffffff81162000 1fde nullfs.ko
gmirror is loaded from loader.conf
root@cage ~/# grep -v ^# /boot/loader.conf
hw.bge.allow_asf="1"
geom_mirror_load="YES"
vm.kmem_size="1280M"
vm.kmem_size_max="1280M"
kern.maxvnodes="400000"
vfs.zfs.prefetch_disable="1"
vfs.zfs.arc_min="64M"
vfs.zfs.arc_max="512M"
kern.ipc.semmni=100
kern.ipc.semmns=1000
kern.ipc.semmnu=300
Miroslav Lachman
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