On 12/16/13 15:48, Teske, Devin wrote:
On Dec 16, 2013, at 1:40 PM, Teske, Devin wrote:
On Dec 16, 2013, at 1:26 PM, Nathan Whitehorn wrote:
On 12/16/13 13:47, Devin Teske wrote:
Author: dteske
Date: Mon Dec 16 19:47:04 2013
New Revision: 259479
URL:
https://urldefense.proofpoint.com/v1/url?u=http://svnweb.freebsd.org/changeset/base/259479&k=%2FbkpAUdJWZuiTILCq%2FFnQg%3D%3D%0A&r=Mrjs6vR4%2Faj2Ns9%2FssHJjg%3D%3D%0A&m=fW6SVzmwwyz0yNXNK7sHp4zegrL63niU%2F%2F21DVtgyGU%3D%0A&s=cdd7f18e0151f222c2934ae69e473dac2e22e74cbde4d5af5758a083fb1c3a7e
Log:
Add kern.geom.label.disk_ident.enable="0" to loader.conf(5).
Discussed on: -current, -stable
MFC after: 3 days
Modified:
head/usr.sbin/bsdinstall/scripts/zfsboot
Modified: head/usr.sbin/bsdinstall/scripts/zfsboot
==============================================================================
--- head/usr.sbin/bsdinstall/scripts/zfsboot Mon Dec 16 19:44:45 2013
(r259478)
+++ head/usr.sbin/bsdinstall/scripts/zfsboot Mon Dec 16 19:47:04 2013
(r259479)
@@ -1159,6 +1159,9 @@ zfs_create_boot()
$BSDINSTALL_TMPETC/rc.conf.zfs || return $FAILURE
f_eval_catch $funcname echo "$ECHO_APPEND" 'zfs_load=\"YES\"' \
$BSDINSTALL_TMPBOOT/loader.conf.zfs || return $FAILURE
+ f_eval_catch $funcname echo "$ECHO_APPEND" \
+ 'kern.geom.label.disk_ident.enable=\"0\"' \
+ $BSDINSTALL_TMPBOOT/loader.conf.zfs || return $FAILURE
# We're all done unless we should go on for boot pool
[ "$ZFSBOOT_BOOT_POOL" ] || return $SUCCESS
Uh -- what is all of this? Why are we disabling kernel functions depending on
what the root filesystem is? Please don't MFC this.
http://lists.freebsd.org/pipermail/freebsd-stable/2013-December/076365.html
http://lists.freebsd.org/pipermail/freebsd-stable/2013-December/076471.html
NB: Happy to rip it out... but want something in-reply to those threads (pretty
please).
Basically... the logic is...
The ZFS pool is built on vdevs of a specific name. The names that are used
should remain the same. Adding this to the loader.conf ensures that the names
that the pool(s) was/were built upon do not change.
This goes beyond just a swap partition I imagine. For example... copying the
data to a new drive using a duplicator. I'm sure there are other cases too.
Thanks for the explanation! I wonder if we should just turn off the disk
ident stuff by default globally -- it was causing problems for me as
well without ZFS root.
-Nathan
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