d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Push down the acquisition of the page queues lock into

Browse Source 
vm_pageout_page_stats().  In particular, avoid acquiring the page
queues lock unless iterating over the active queue.
This commit is contained in:
alc 2010-07-02 20:56:22 +00:00
parent 3e4ac0b6ee
commit 99b0e7f96b
1 changed files with 2 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
sys/vm/vm_pageout.c
View File

@ -1355,7 +1355,6 @@ vm_pageout_page_stats()
static int fullintervalcount = 0;
int page_shortage;
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
page_shortage =
(cnt.v_inactive_target + cnt.v_cache_max + cnt.v_free_min) -
(cnt.v_free_count + cnt.v_inactive_count + cnt.v_cache_count);
@ -1363,6 +1362,7 @@ vm_pageout_page_stats()
if (page_shortage <= 0)
return;
vm_page_lock_queues();
pcount = cnt.v_active_count;
fullintervalcount += vm_pageout_stats_interval;
if (fullintervalcount < vm_pageout_full_stats_interval) {
@ -1448,6 +1448,7 @@ vm_pageout_page_stats()
VM_OBJECT_UNLOCK(object);
m = next;
}
vm_page_unlock_queues();
}
/*
@ -1569,9 +1570,7 @@ vm_pageout()
if (error && !vm_pages_needed) {
mtx_unlock(&vm_page_queue_free_mtx);
pass = 0;
vm_page_lock_queues();
vm_pageout_page_stats();
vm_page_unlock_queues();
continue;
}
}