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Date:      Fri, 21 Nov 2008 17:25:18 +0100
From:      Pawel Jakub Dawidek <pjd@FreeBSD.org>
To:        Nikolay Denev <ndenev@gmail.com>
Cc:        freebsd-current@freebsd.org
Subject:   Re: HEADS UP: New ZFS in the tree.
Message-ID:  <20081121162518.GC6509@garage.freebsd.pl>
In-Reply-To: <18E318DD-29FA-4E26-89CF-11B893B42E34@gmail.com>
References:  <20081117205526.GC1733@garage.freebsd.pl> <8ECD400F-BFE3-4E31-94F0-39AF5F44FDAC@gmail.com> <20081119090307.GA81236@icarus.home.lan> <alpine.BSF.2.00.0811190323110.59299@borg> <FD98E80A-30DC-4700-9C0F-0D77835DBB32@gmail.com> <18E318DD-29FA-4E26-89CF-11B893B42E34@gmail.com>

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On Wed, Nov 19, 2008 at 01:58:49PM +0200, Nikolay Denev wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>=20
>=20
> On 19 Nov, 2008, at 11:48 , Nikolay Denev wrote:
> >
> >Well, it looks like that on -current and a 4G amd64 machine probably =20
> >there is no need
> >to tune anything. Here are my defaults with everything vm and zfs =20
> >related in loader.conf commented :
> >
> >vm.kmem_size_max: 4509713203
> >vfs.zfs.arc_max: 863907840
> >
>=20
> I was able to panic it again with "kmem_map too small" with these =20
> settings (defaults).
>=20
> This are the bonnie++ arguments that i've used:
> bonnie++  -d /tank -c 4 -r 4096 -x 9999999 -u 0:0

I wasn't able to panic my test machine running this command on i386
machine with this in /boot/loader.conf:

vm.kmem_size=3D1073741824
vm.kmem_size_max=3D1073741824

(1GB)

Although I now found that you were trying raidz2 and I had two two-way
mirrors. I'm retrying now.

PS. The panic is not yet fixed completely, unfortunately, but it should
be a bit harder to trigger it now.

--=20
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd@FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

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