Date: Fri, 02 Nov 2012 19:30:04 +0100 From: Bas Smeelen <b.smeelen@ose.nl> To: freebsd-stable@freebsd.org Subject: [patch] Re: SU+J on 9.1-RC2 ISO Message-ID: <5094112C.2070102@ose.nl> In-Reply-To: <50940E40.3090709@ose.nl> References: <5093F934.7050306@ose.nl> <5093FD3D.3080201@ateamsystems.com> <1351876381.2657.1.camel@mjakubik.localdomain> <50940276.5030306@ateamsystems.com> <50940C20.3090409@ose.nl> <50940E40.3090709@ose.nl>
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On 11/02/2012 07=3A17 PM=2C Bas Smeelen wrote=3A
=3E On 11/02/2012 07=3A08 PM=2C Bas Smeelen wrote=3A
=3E=3E On 11/02/2012 06=3A27 PM=2C Adam Strohl wrote=3A
=3E=3E=3E On 11/3/2012 0=3A13=2C Mike Jakubik wrote=3A
=3E=3E=3E=3E You can disable SU+J after installing=2C though it would be ni=
ce if the
=3E=3E=3E=3E installer gave you a choice=2E
=3E=3E=3E This assumes that you know about this flaw=2C which most people d=
o not=2E
=3E=3E=3E
=3E=3E=3E I didn=27t until I discovered it by panic-ing a perfectly fine ru=
nning
=3E=3E=3E server=2E Getting burned by a known bug like this shouldn=27t be=
=22SOP=22
=3E=3E=3E for users of FreeBSD=2E
=3E=3E=3E
=3E=3E=3E If anything it should be turned off by default=2C and people can=
turn it
=3E=3E=3E on if they want given the landmine it plants=2E If they know how=
to
=3E=3E=3E turn it on they=27re much more likely to be aware of the issue=2E=
=3E=3E=3E
=3E=3E=3E
=3E=3E=3E
To sum it up
SU+J should be turned off by default because of
1=2E It does not work with dumping a live system e=2Eg=2E snapshot
2=2E it is not recommended for SSD installs
3=2E =22Smart=22 admins can turn it on if they want
root=40sys=3A/usr/src/usr=2Esbin/bsdinstall/partedit =23 diff -u gpart=5Fop=
s=2Ec=20
gpart=5Fops=2Ecnew
--- gpart=5Fops=2Ec 2012-08-06 01=3A54=3A33=2E000000000 +0200
+++ gpart=5Fops=2Ecnew 2012-11-02 19=3A07=3A45=2E000000000 +0100
=40=40 -90=2C8 +90=2C8 =40=40
=7B=22SU=22=2C =22Softupdates=22=2C
=22Enable softupdates =28default=29=22=2C 1 =7D=2C
=7B=22SUJ=22=2C =22Softupdates journaling=22=2C
- =22Enable file system journaling =28default - =22
- =22turn off for SSDs=29=22=2C 1 =7D=2C
+ =22Disable file system journaling =28default - =22
+ =22turn on for adventurish admins=29=22=2C 0 =7D=2C
=7B=22TRIM=22=2C =22Enable SSD TRIM support=22=2C
=22Enable TRIM support=2C useful on solid-state drives=22=
=2C
0 =7D=2C
Please comment=2C then I can file a PR or not
Cheers
Bas
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SE=2E
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