Date: Fri, 31 Dec 2010 20:01:17 -0400 From: Chris Forgeron <cforgeron@acsi.ca> To: "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org> Subject: RE: ZFS v28 and zil_disable Message-ID: <BEBC15BA440AB24484C067A3A9D38D7E0149F32D13D9@server7.acsi.ca> In-Reply-To: <BEBC15BA440AB24484C067A3A9D38D7E0149F32D13D8@server7.acsi.ca> References: <BEBC15BA440AB24484C067A3A9D38D7E0149F32D13D8@server7.acsi.ca>
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Oh, and then I read what I post, and notice that the zil_disable parts are =
in the .orig files, from the patch. :-)
Oh well, I guess I'll just have to invest in a proper ZIL device.=20
--
Christopher Forgeron, B.Sc., CCS, A+, N+=20
ACSI Consulting, Inc / Aardvark Computer Solutions, Inc.
email: chris@acsi.ca
2070 Oxford Street, Suite 100, Halifax NS B3L-2T2
Tel: 902-425-2686=A0 Fax: 902-484-7909
-----Original Message-----
From: owner-freebsd-stable@freebsd.org [mailto:owner-freebsd-stable@freebsd=
.org] On Behalf Of Chris Forgeron
Sent: December-31-10 6:01 PM
To: freebsd-stable@freebsd.org
Subject: ZFS v28 and zil_disable
BTW, I'm noticing the removal of vfs.zfs.zil_disable as well - It's not lis=
ted as a sysctl when I check vfs.zfs, but I see it's still in the source co=
de;
In usr/src/sys/cddl/ :
# grep -r zil_disable *
cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zil.h.orig:extern int zil_di=
sable;
cddl/contrib/opensolaris/uts/common/fs/zfs/zil.c.orig:int zil_disable =3D 0=
; /* disable intent logging */
cddl/contrib/opensolaris/uts/common/fs/zfs/zil.c.orig:TUNABLE_INT("vfs.zfs.=
zil_disable", &zil_disable); cddl/contrib/opensolaris/uts/common/fs/zfs/zil=
.c.orig:SYSCTL_INT(_vfs_zfs, OID_AUTO, zil_disable, CTLFLAG_RW, &zil_disabl=
e, 0,
cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c.orig: if (zil_dis=
able) {
cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c.orig: if (bp->bio=
_cmd =3D=3D BIO_FLUSH && !zil_disable)
I know Sun was trying to move away from allowing people to disable the ZIL,=
but was this by design in the FreeBSD port, or are we just missing some co=
de to link the sysctl up with the code to easily disable the ZIL?=20
I'll try setting zil_disable=3D1 in the source tomorrow and recompile to se=
e if it works. It's such a huge speed increase for some operations (80MB/s=
ec with ZIL, 450 MB/sec without ZIL) that I still use zil_disable.
I'll also have to check my 9.0-CUR v28 patch, although I assume it's the sa=
me.=20
-----Original Message-----
From: owner-freebsd-stable@freebsd.org [mailto:owner-freebsd-stable@freebsd=
.org] On Behalf Of Jean-Yves Avenard
Sent: December-27-10 1:31 AM
To: jhell
Cc: freebsd-stable@freebsd.org
Subject: Re: New ZFSv28 patchset for 8-STABLE: Kernel Panic
Jean-Yves
PS: saving my 5MB files over the network , went from 40-55s with v15 to a c=
onstant 16s with v28... I can't test with ZIL completely disabled , it seem=
s that vfs.zfs.zil_disable has been removed, and so did vfs.zfs.write_limit=
_override _______________________________________________
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