From owner-freebsd-hackers@freebsd.org  Thu Dec 24 17:32:48 2015
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Subject: Re: ZFS questions, ZFS hang
From: Bob Bishop <rb@gid.co.uk>
In-Reply-To: <20151224075041.GD4535@zxy.spb.ru>
Date: Thu, 24 Dec 2015 17:32:44 +0000
Cc: joe mcguckin <joe@via.net>, hackers@freebsd.org
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 <20151224075041.GD4535@zxy.spb.ru>
To: Slawa Olhovchenkov <slw@zxy.spb.ru>
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Hi,

> On 24 Dec 2015, at 07:50, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote:
>=20
> On Wed, Dec 23, 2015 at 08:09:36PM -0800, joe mcguckin wrote:
>=20
>> I have a dual xeon w 16G of ram and 16 drives that I=E2=80=99m using =
to play around with zfs.
>>=20
>> I was running the 32 bit kernel and everything seemed to work ok. I =
upgraded to the amd 64 bit
>> kernel and I=E2=80=99m seeing the box hang under load. No error =
messages - it just goes catatonic.
>>=20
>> I=E2=80=99m running the GENERIC kernel. Are there any recommended =
kernel settings I should be using?
>=20
> Update to STABLE, some related bug found and fixed.

Also, if you have carried over any ZFS-specific tuning from your 32-bit =
setup, you almost certainly don=E2=80=99t need it.

--
Bob Bishop
rb@gid.co.uk