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| author | kib <kib@FreeBSD.org> | 2014-09-27 07:54:27 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2014-09-27 07:54:27 +0000 |
| commit | 6a9b8ab035c5cd9b9ca271cea31e96c1309f9316 (patch) | |
| tree | a613c120b71edff176eb479c22d41696816264d2 /sys/vm | |
| parent | 48d7d19be1032963ba598acf23049528a50200bc (diff) | |
| download | FreeBSD-src-6a9b8ab035c5cd9b9ca271cea31e96c1309f9316.zip FreeBSD-src-6a9b8ab035c5cd9b9ca271cea31e96c1309f9316.tar.gz | |
MFC r272036:
Avoid calling vm_map_pmap_enter() for the MADV_WILLNEED on the wired
entry, the pages must be already mapped.
Approved by: re (gjb)
Diffstat (limited to 'sys/vm')
| -rw-r--r-- | sys/vm/vm_map.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c index 15611bf..a63713d 100644 --- a/sys/vm/vm_map.c +++ b/sys/vm/vm_map.c @@ -2209,7 +2209,14 @@ vm_map_madvise( vm_object_madvise(current->object.vm_object, pstart, pend, behav); - if (behav == MADV_WILLNEED) { + + /* + * Pre-populate paging structures in the + * WILLNEED case. For wired entries, the + * paging structures are already populated. + */ + if (behav == MADV_WILLNEED && + current->wired_count == 0) { vm_map_pmap_enter(map, useStart, current->protection, |
