I was making my way through the evil tuning guide and noticed a couple
updates that seem appropriate.  I tried to create an account to be
able to add this into the "discussion" tab but account creation seems
to be a NOP.
http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide#RFEs
- 6533726 fixed in snv_79.  No sign of it in S10 yet.
http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide#Solaris_10_8.2F07_and_Solaris_Nevada_.28snv_51.29_Releases
- No need to convert to hex.  According to system(4):
     set [<module>:]<symbol> {=, |, &} [~][-]<value>
         . . .
         Operations that  are  supported  for  modifying  integer
         variables  are: simple assignment, inclusive bitwise OR,
         bitwise AND, one''s complement, and  negation.  Variables
         in a specific loadable module can be targeted for modif-
         ication by specifying the variable  name  prefixed  with
         the kernel module name and a colon (:) separator. Values
         can be specified as hexadecimal (0x10), Octal (046),  or
         Decimal (5).
http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide#RFEs_2
- 6429205 fixed in snv_87.
- Good explanation at
http://mail.opensolaris.org/pipermail/zfs-discuss/2008-April/046937.html
-- 
Mike Gerdts
http://mgerdts.blogspot.com/