Kyle Moffett wrote:
On Mar 21, 2007, at 19:11:40, Andrew Morton wrote:
On Wed, 21 Mar 2007 16:01:32 -0700 Randy Dunlap
<[EMAIL PROTECTED]> wrote:
I prefer the fixed-point values for pressure and dirty* to having
duplicated entries for each of them. I'll proceed with that idea.
Problem is, if a read of /proc/sys/vm/dirty_ratio is changed to return
7.457 then existing userspace might get confused.
This might be acceptable if we are careful to ensure that reads of
/proc/sys/vm/dirty_ratio will always return an integer if it was
previously initialised with an integer.
What about instead adding support for fractions (IE: "1/1000") in
/proc/sys/vm/dirty_ratio? If the denominator is 100, the default, then
it prints in the form "$NUMERATOR", otherwise it prints answers of the
form "$NUMERATOR/$DENOMINATOR". Input could be of either form, with the
kernel auto-setting the denominator to 100 if none is specified.
Hi,
That makes a lot of sense to me. It gives us finer-grained control
without having to support fixed-point data.
I've been working on the fixed-point data patch, but I'm going to give
this method some time also, to see how it looks in code (instead of just
thinking about it).
Thanks.
--
~Randy
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