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Index: head/sys/vm/vm_pageout.c
===================================================================
--- head/sys/vm/vm_pageout.c
+++ head/sys/vm/vm_pageout.c
@@ -1649,25 +1649,26 @@
/*
* Dispatch a number of inactive threads according to load and collect the
- * results to prevent a coherent (CEM: incoherent?) view of paging activity on
- * this domain.
+ * results to present a coherent view of paging activity on this domain.
*/
static int
vm_pageout_inactive_dispatch(struct vm_domain *vmd, int shortage)
{
- u_int freed, pps, threads, us;
+ u_int freed, pps, slop, threads, us;
vmd->vmd_inactive_shortage = shortage;
+ slop = 0;
/*
* If we have more work than we can do in a quarter of our interval, we
* fire off multiple threads to process it.
*/
- if (vmd->vmd_inactive_threads > 1 && vmd->vmd_inactive_pps != 0 &&
+ threads = vmd->vmd_inactive_threads;
+ if (threads > 1 && vmd->vmd_inactive_pps != 0 &&
shortage > vmd->vmd_inactive_pps / VM_INACT_SCAN_RATE / 4) {
- threads = vmd->vmd_inactive_threads;
- vm_domain_pageout_lock(vmd);
vmd->vmd_inactive_shortage /= threads;
+ slop = shortage % threads;
+ vm_domain_pageout_lock(vmd);
blockcount_acquire(&vmd->vmd_inactive_starting, threads - 1);
blockcount_acquire(&vmd->vmd_inactive_running, threads - 1);
wakeup(&vmd->vmd_inactive_shortage);
@@ -1675,7 +1676,7 @@
}
/* Run the local thread scan. */
- vm_pageout_scan_inactive(vmd, vmd->vmd_inactive_shortage);
+ vm_pageout_scan_inactive(vmd, vmd->vmd_inactive_shortage + slop);
/*
* Block until helper threads report results and then accumulate

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