[patch] Re: SU+J on 9.1-RC2 ISO

Bas Smeelen b.smeelen at ose.nl
Fri Nov 2 18:30:07 UTC 2012

On 11/02/2012 07:17 PM, Bas Smeelen wrote:
> On 11/02/2012 07:08 PM, Bas Smeelen wrote:
>> On 11/02/2012 06:27 PM, Adam Strohl wrote:
>>> On 11/3/2012 0:13, Mike Jakubik wrote:
>>>> You can disable SU+J after installing, though it would be nice if the
>>>> installer gave you a choice.
>>> This assumes that you know about this flaw, which most people do not.
>>> I didn't until I discovered it by panic-ing a perfectly fine running
>>> server.  Getting burned by a known bug like this shouldn't be "SOP"
>>> for users of FreeBSD.
>>> If anything it should be turned off by default, and people can turn it
>>> on if they want given the landmine it plants.  If they know how to
>>> turn it on they're much more likely to be aware of the issue.
To sum it up
SU+J should be turned off by default because of
1. It does not work with dumping a live system e.g. snapshot
2. it is not recommended for SSD installs
3. "Smart" admins can turn it on if they want

root at sys:/usr/src/usr.sbin/bsdinstall/partedit # diff -u gpart_ops.c 
--- gpart_ops.c    2012-08-06 01:54:33.000000000 +0200
+++ gpart_ops.cnew    2012-11-02 19:07:45.000000000 +0100
@@ -90,8 +90,8 @@
              {"SU", "Softupdates",
                  "Enable softupdates (default)", 1 },
              {"SUJ", "Softupdates journaling",
-                "Enable file system journaling (default - "
-                "turn off for SSDs)", 1 },
+                "Disable file system journaling (default - "
+                "turn on for adventurish admins)", 0 },
              {"TRIM", "Enable SSD TRIM support",
                  "Enable TRIM support, useful on solid-state drives",
                  0 },

Please comment, then I can file a PR or not

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