Author: kib
Date: Thu Apr 29 09:57:25 2010
New Revision: 207364
URL: http://svn.freebsd.org/changeset/base/207364
Log:
In swap pager, do not free the non-requested pages from the run if they are
wired. Kstack pages are wired, this change prepares swap pager for handling
of long runs of kstack pages.
Noted and reviewed by: alc
Tested by: pho
MFC after: 2 weeks
Modified:
head/sys/vm/swap_pager.c
Modified: head/sys/vm/swap_pager.c
==============================================================================
--- head/sys/vm/swap_pager.c Thu Apr 29 09:55:51 2010 (r207363)
+++ head/sys/vm/swap_pager.c Thu Apr 29 09:57:25 2010 (r207364)
@@ -378,6 +378,14 @@ static void swp_pager_meta_free(vm_objec
static void swp_pager_meta_free_all(vm_object_t);
static daddr_t swp_pager_meta_ctl(vm_object_t, vm_pindex_t, int);
+static void
+swp_pager_free_nrpage(vm_page_t m)
+{
+
+ if (m->wire_count == 0)
+ vm_page_free(m);
+}
+
/*
* SWP_SIZECHECK() - update swap_pager_full indication
*
@@ -1131,9 +1139,9 @@ swap_pager_getpages(vm_object_t object,
vm_page_lock_queues();
for (k = 0; k < i; ++k)
- vm_page_free(m[k]);
+ swp_pager_free_nrpage(m[k]);
for (k = j; k < count; ++k)
- vm_page_free(m[k]);
+ swp_pager_free_nrpage(m[k]);
vm_page_unlock_queues();
}
@@ -1529,7 +1537,7 @@ swp_pager_async_iodone(struct buf *bp)
*/
m->valid = 0;
if (i != bp->b_pager.pg_reqpage)
- vm_page_free(m);
+ swp_pager_free_nrpage(m);
else
vm_page_flash(m);
/*
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