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authorkmacy <kmacy@FreeBSD.org>2010-04-30 00:46:43 +0000
committerkmacy <kmacy@FreeBSD.org>2010-04-30 00:46:43 +0000
commit1dc1263413262d13f45f42d89c554d0ddc167ca2 (patch)
tree250705d42bcb9b364f4fd2233c38faaadadf7ae0 /sys/vm/vm_kern.c
parenta43425e8835983e7c93a15a2d6a42fdb292c1676 (diff)
downloadFreeBSD-src-1dc1263413262d13f45f42d89c554d0ddc167ca2.zip
FreeBSD-src-1dc1263413262d13f45f42d89c554d0ddc167ca2.tar.gz
On Alan's advice, rather than do a wholesale conversion on a single
architecture from page queue lock to a hashed array of page locks (based on a patch by Jeff Roberson), I've implemented page lock support in the MI code and have only moved vm_page's hold_count out from under page queue mutex to page lock. This changes pmap_extract_and_hold on all pmaps. Supported by: Bitgravity Inc. Discussed with: alc, jeffr, and kib
Diffstat (limited to 'sys/vm/vm_kern.c')
-rw-r--r--sys/vm/vm_kern.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/vm/vm_kern.c b/sys/vm/vm_kern.c
index 739d289..ead6d0d 100644
--- a/sys/vm/vm_kern.c
+++ b/sys/vm/vm_kern.c
@@ -380,10 +380,12 @@ retry:
i -= PAGE_SIZE;
m = vm_page_lookup(kmem_object,
OFF_TO_IDX(offset + i));
+ vm_page_lock(m);
vm_page_lock_queues();
vm_page_unwire(m, 0);
vm_page_free(m);
vm_page_unlock_queues();
+ vm_page_unlock(m);
}
VM_OBJECT_UNLOCK(kmem_object);
vm_map_delete(map, addr, addr + size);
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