Just as a heads up since some dovecot users do use ZFS, pjd recently posted a patch to upgrade ZFS in 8-current from v6 to v11 (latest from opensolaris). Its reported to fix a number of problems, and add new features. The patch does not apply to 7, that won't be available for a while apparently, but they are looking for feedback on the fs or current mailing lists to encourage sooner integration (possibly by 7.1).
Quick instructions: fetch http://people.freebsd.org/~pjd/patches/zfs_20080727.patch.bz2 bunzip2 zfs_20080727.patch.bz2 cd /usr/src/ patch -p0 < /path/to/zfs_20080727.patch do a FULL upgrade of world/kernel.
kmem tweaks may still be needed but its a little more resilient than before, also 8-current now lets you configure a larger kmem than the previous ~1.8G limit. It is recommended to remove other tweaks from loader.conf such as zil_disable, etc and see how it does.
I've upgraded my laptop and so far so good, but I don't have dovecot on any systems with ZFS so I can't test that aspect.
On Fri, Apr 04, 2008 at 02:06:40PM -0400, Dillon Kass wrote:
Hi, I've applied this patch to my 7-STABLE box and it doesn't help with the corrupted dovecot index files.
Anyone using dovecot with ZFS on FreeBSD should use mmap_disable = yes in their dovecot.conf
Cheers, Dillon
Adam McDougall wrote:
Saw this just come through for 8-current, 7-stable ought to have it in a week or so. I have not encountered the problem so I would not be able to judge if this fixes it. Patch here: http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/contrib/opensolaris/uts/common...
pjd 2008-03-15 23:23:04 UTC
FreeBSD src repository
Modified files: sys/contrib/opensolaris/uts/common/fs/zfs zfs_vnops.c Log: Fix mmap(2) on ZFS after some changes in VM subsystem.
Submitted by: alc Reported by: kris (originally) and many others Tested with: fsx MFC after: 1 week
Revision Changes Path 1.28 +4 -0
src/sys/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c