Bulent Abali wrote:
>
> extern struct page_state {
> unsigned long nr_dirty;
> unsigned long nr_locked;
> } ____cacheline_aligned page_states[NR_CPUS];
>
> This is perfect. Looks like, if a run summation over all the CPUs I will
> get the total locked and dirty pages, provided mm.h macros are respected.
That's correct. And the mm.h macros *are* respected. That patch
ensures that they are.
It goes as far as to rename PG_locked and PG_dirty to PG_locked_dontuse
and PG_dirty_dontuse.
I'll be adding page_cache_size to the above struct, at least.
The "run summation" function is already there, btw: get_page_state().
> What is the outlook for inclusion of this patch in the main kernel? Do you
> plan to submit or have been included yet?
Well it's all a part of a work to aggressively improve the efficiency
of regular file I/O. I don't know if the big grand plan will be successful
yet. At this time, it's thumbs up - way up.
Nor do I know if this is a direction in which Linus wishes to take
his kernel.
But this change, the readahead changes, the pdflush pool and a few other
pieces I have planned are probably appropriate for the base kernel
irrespective of the end outcome.
We'll see...
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This archive was generated by hypermail 2b29 : Thu Mar 07 2002 - 21:00:56 EST