mtune" -- System Administration" "
Define tunable kernel variables
/etc/conf/mtune
File mtune defines all of the tunable
variables within the kernel. These variables let you
configure some aspects of your kernel, without having to
modify the kernel's drivers or recompile the kernel.
Command idmkcoh reads this file when it
builds a new kernel, and uses its contents to help patch the
newly build kernel. A mkdev script (kept
in a subdirectory of /etc/conf) also sets
appropriate variables within this file, based on your
answers to its questions.
Each line within mtune defines one tunable
parameter. A line consists of four fields, as follows:
- 11.. _N_a_m_e
- This field names the parameter. It cannot exceed 20
characters.
- 22.. _M_i_n_i_m_u_m _V_a_l_u_e
- The legal minimum value of this parameter.
- 33.. _D_e_f_a_u_l_t _V_a_l_u_e
- The default value for this parameter. This value can
be overridden by an entry in file
/etc/conf/stune.
- 44.. _M_a_x_i_m_u_m _V_a_l_u_e
- The legal maximum value of this parameter.
Note that under UNIX System V, fields 2 and 3 are reversed.
A line that begins with the pound sign `#' is a comment, and
is ignored by idmkcoh when it builds a new
kernel.
For details on the parameters that this file sets, read the
comments within this file.
See Also
Notes
mtune contains comments that describe the
kernel variables that you can tune. If you wish to tune the
kernel, you should read this file and modify it
appropriately. The variables are documented in this file
rather than in the COHERENT manual to ensure that you have
exactly accurate information about the variables that reside
in the version of the kernel on your system.