Date: Fri, 16 Oct 2015 09:13:13 +0200 From: Frank de Bot <lists@searchy.net> To: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: Re: Reloading iscsi target, iscsi initiator panics Message-ID: <5620A389.5010901@searchy.net> In-Reply-To: <20151015201212.GA4609@brick.home> References: <561EC629.30106@searchy.net> <20151015113428.GA3741@brick.home> <561FEAF5.8080607@searchy.net> <20151015201212.GA4609@brick.home>
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Edward Tomasz Napierała wrote:
> On 1015T2005, Frank de Bot (lists) wrote:
>> Edward Tomasz Napierała wrote:
>>> On 1014T2316, Frank de Bot (lists) wrote:
>>>> Hello,
>>>>
>>>> I have a FreeBSD 10.2 server running as iSCSI target. Another FreeBSD
>>>> 10.2 is an initiator and has several targets used.
>>>>
>>>> When I add a target and reload its config with 'service ctld reload',
>>>> the FreeBSD initiator server panics. It's reproducable (I have a
>>>> coredump, but I think it's clear what the problem is)
>>>
>>> How easy it is to reproduce, eg. does it happen about every time?
>>> Could you paste the backtrace?
>>
>> The first time I didn't understand what happened, the second time I
>> could relate it directly to the reloading of ctld on the iSCSI, within
>> moments the server paniced.
>>
>> I got 2 backtraces:
>>
>> First one:
>>
>> Fatal trap 12: page fault while in kernel mode
>> cpuid = 1; softdep_deallocate_dependencies: got error 6 while accessing
>
> This is the FFS on the initiator side panicing because the device it's
> on went away. The softupdates code can't handle that very well.
>
> I have no idea why the devices went away and then reappeared, as visible
> in the logs. What has the changed in the ctl.conf? Do you have any
> iscsi-related sysctls set on the initiator side?
>
I've added a new target in the ctl.conf . On the linux server I also see
a brief disconnect, but a reconnect is handled well.
I haven't set any sysctl's related to iscsi
My ctl.conf is (again anonymized):
auth-group my-auth {
chap "myiscsi" "verysecret"
}
portal-group pg0 {
discovery-auth-group my-auth
listen 10.13.37.2
}
target iqn.2015-03.lan.my.nas:vmstorage-29 {
auth-group my-auth
portal-group pg0
lun 0 {
path /tank/images/iscsi/vmstorage-29/vmstorage-29.img
size 20484M
blocksize 4096
option unmap on
}
}
target iqn.2015-03.lan.my.nas:vmstorage-44 {
auth-group my-auth
portal-group pg0
lun 0 {
path /tank/images/iscsi/vmstorage-44/vmstorage-44.img
size 102404M
blocksize 4096
option unmap on
}
}
target iqn.2015-03.lan.my.nas:keyserver.my.nl {
auth-group my-auth
portal-group pg0
lun 0 {
path /dev/zvol/tank/hosting_images/keyserver.my.nl
blocksize 4096
option unmap on
}
}
the vmstorage-44 is last added to the config
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