Hugh Dickins wrote:
On Wed, 21 Sep 2005, Jay Lan wrote:
Hugh Dickins wrote:
4. If you've noticed a regression, you must be one of the elite that
knows
what these counters are used for: nothing in the kernel.org tree does.
Please add a comment saying what it is that uses them and how, so
developers can make better judgements about how best to maintain them.
5. Please add appropriate CONFIG, dummy macros etc., so that no time
is wasted on these updates in all the vanilla systems which have no
interest in them - but maybe Christoph already has that well in hand.
It is used in enhanced system accounting. An obvious CONFIG would be
CONFIG_BSD_PROCESS_ACCT.
However, since the CONFIG flag is almost always Yes, people would need
to turn it off if they do not want system accounting. Would that be
OK?
Christoph will know the issue better than I. But I'd say no, that's
not OK. You have some out of tree "enhanced system accounting" which
has been granted the privilege of hooks within the mainline kernel:
they should be disabled unless a CONFIG option is switched on, which
your accounting patch can do. And the (mainline) Kconfig help entry
for that CONFIG option should point us to the source of your package.
It is not really an issue of out-of-tree accounting package. The
system accounting is based on very old technology and needs improvement.
The issue we face is not an issue of one particular accounting package.
I think the best approach would be to wrap the mm usage accounting
in a new CONFIG_ENHANCED_SYS_ACCT and leave it OFF by default so that
people can still get the minimal accounting with
CONFIG_BSD_PROCESS_ACCT.
- jay
Hugh
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