Author: alc
Date: Mon Aug 1 21:21:26 2016
New Revision: 303641
URL: https://svnweb.freebsd.org/changeset/base/303641
Log:
MFC r303356 and r303465
Remove any mention of cache (PG_CACHE) pages from the comments in
vm_pageout_scan(). That function has not cached pages since r284376.
Approved by: re (kib)
Modified:
stable/11/sys/vm/vm_pageout.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/vm/vm_pageout.c
==============================================================================
--- stable/11/sys/vm/vm_pageout.c Mon Aug 1 21:21:21 2016
(r303640)
+++ stable/11/sys/vm/vm_pageout.c Mon Aug 1 21:21:26 2016
(r303641)
@@ -872,7 +872,7 @@ unlock_mp:
* vm_pageout_scan does the dirty work for the pageout daemon.
*
* pass 0 - Update active LRU/deactivate pages
- * pass 1 - Move inactive to cache or free
+ * pass 1 - Free inactive pages
* pass 2 - Launder dirty pages
*/
static void
@@ -915,8 +915,7 @@ vm_pageout_scan(struct vm_domain *vmd, i
addl_page_shortage = 0;
/*
- * Calculate the number of pages we want to either free or move
- * to the cache.
+ * Calculate the number of pages that we want to free.
*/
if (pass > 0) {
deficit = atomic_readandclear_int(&vm_pageout_deficit);
@@ -943,11 +942,10 @@ vm_pageout_scan(struct vm_domain *vmd, i
vnodes_skipped = 0;
/*
- * Start scanning the inactive queue for pages we can move to the
- * cache or free. The scan will stop when the target is reached or
- * we have scanned the entire inactive queue. Note that m->act_count
- * is not used to form decisions for the inactive queue, only for the
- * active queue.
+ * Start scanning the inactive queue for pages that we can free. The
+ * scan will stop when we reach the target or we have scanned the
+ * entire queue. (Note that m->act_count is not used to make
+ * decisions for the inactive queue, only for the active queue.)
*/
pq = &vmd->vmd_pagequeues[PQ_INACTIVE];
maxscan = pq->pq_cnt;
@@ -1072,10 +1070,9 @@ unlock_page:
/*
* If the page appears to be clean at the machine-independent
* layer, then remove all of its mappings from the pmap in
- * anticipation of placing it onto the cache queue. If,
- * however, any of the page's mappings allow write access,
- * then the page may still be modified until the last of those
- * mappings are removed.
+ * anticipation of freeing it. If, however, any of the page's
+ * mappings allow write access, then the page may still be
+ * modified until the last of those mappings are removed.
*/
if (object->ref_count != 0) {
vm_page_test_dirty(m);
@@ -1171,8 +1168,8 @@ relock_queues:
#if !defined(NO_SWAPPING)
/*
- * Wakeup the swapout daemon if we didn't cache or free the targeted
- * number of pages.
+ * Wakeup the swapout daemon if we didn't free the targeted number of
+ * pages.
*/
if (vm_swap_enabled && page_shortage > 0)
vm_req_vmdaemon(VM_SWAP_NORMAL);
@@ -1180,7 +1177,7 @@ relock_queues:
/*
* Wakeup the sync daemon if we skipped a vnode in a writeable object
- * and we didn't cache or free enough pages.
+ * and we didn't free enough pages.
*/
if (vnodes_skipped > 0 && page_shortage > vm_cnt.v_free_target -
vm_cnt.v_free_min)
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