MI changes:

 - provide an interface (macros) to the page coloring part of the VM system,
   this allows to try different coloring algorithms without the need to
   touch every file [1]
 - make the page queue tuning values readable: sysctl vm.stats.pagequeue
 - autotuning of the page coloring values based upon the cache size instead
   of options in the kernel config (disabling of the page coloring as a
   kernel option is still possible)

MD changes:
 - detection of the cache size: only IA32 and AMD64 (untested) contains
   cache size detection code, every other arch just comes with a dummy
   function (this results in the use of default values like it was the
   case without the autotuning of the page coloring)
 - print some more info on Intel CPU's (like we do on AMD and Transmeta
   CPU's)

Note to AMD owners (IA32 and AMD64): please run "sysctl vm.stats.pagequeue"
and report if the cache* values are zero (= bug in the cache detection code)
or not.

Based upon work by:	Chad David <davidc@acns.ab.ca> [1]
Reviewed by:		alc, arch (in 2004)
Discussed with:		alc, Chad David, arch (in 2004)

1 files changed, 2 insertions, 2 deletions

diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c
index 4d7b5da..c519259 100644
--- a/sys/kern/vfs_bio.c
+++ b/sys/kern/vfs_bio.c
@@ -2863,9 +2863,9 @@ allocbuf(struct buf *bp, int size)
 				 * page daemon?
 				 */
 				if ((curproc != pageproc) &&
-				    ((m->queue - m->pc) == PQ_CACHE) &&
+				    (VM_PAGE_INQUEUE1(m, PQ_CACHE)) &&
 				    ((cnt.v_free_count + cnt.v_cache_count) <
-					(cnt.v_free_min + cnt.v_cache_min))) {
+			 		(cnt.v_free_min + cnt.v_cache_min))) {
 					pagedaemon_wakeup();
 				}
 				vm_page_wire(m);