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Date:      Wed, 9 Mar 2016 04:10:51 +0000
From:      Ed Maste <emaste@freebsd.org>
To:        =?UTF-8?B?SmVhbi1Tw6liYXN0aWVuIFDDqWRyb24=?= <jean-sebastien.pedron@dumbbell.fr>
Cc:        FreeBSD Current <freebsd-current@freebsd.org>, Alexander Motin <mav@freebsd.org>
Subject:   Re: Crash with ZFS between r296491 and r296548
Message-ID:  <CAPyFy2C0EGPw_P6vo=SSKtByjAYw7WUoMFTZ1hNy=RetO=tmGg@mail.gmail.com>
In-Reply-To: <CAPyFy2Df9GZnYdXVT74GZ88Bc4tsdU1uxVb1RiRdWYWs4%2B3cbQ@mail.gmail.com>
References:  <56DF65D1.3000707@dumbbell.fr> <CAPyFy2Df9GZnYdXVT74GZ88Bc4tsdU1uxVb1RiRdWYWs4%2B3cbQ@mail.gmail.com>

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On 9 March 2016 at 01:39, Ed Maste <emaste@freebsd.org> wrote:
> On 8 March 2016 at 18:52, Jean-S=C3=A9bastien P=C3=A9dron
> <jean-sebastien.pedron@dumbbell.fr> wrote:
>> Hi!
>>
>> I use Root on ZFS and my laptop doesn't boot with a kernel from r296548
>> and world from r296491 (so older than kernel). Ed hits a similar crash.
>>
>> Here are the dmesg and backtrace of zfs(8):
>> https://gist.github.com/dumbbell/c9978ad4ac70214f0f47
>>
>> With a kernel and world from r296491, everything is ok.
>>
>> I didn't have the time to bisect the bad commit yet, so this is mostly a
>> warning for other. Maybe someone will know what's wrong :)
>
> The error's coming from namespace_reload() in libzfs_util.c,
> ioctl(hdl->libzfs_fd, ZFS_IOC_POOL_CONFIGS, &zc)
>
> I haven't had a chance to bisect yet either. There are 9 or so commits
> between r296491 and r296548 -- I hope mav@ has some insight.

I still haven't been able to bisect, but in a local tree I've reverted
recent ZFS changes and the issue is gone.

Reverted commits: r296510, r296512, r296514, r296516, r296519,
r296521, r296523, r296528, r296530



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