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| author | alc <alc@FreeBSD.org> | 2003-06-26 15:44:03 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2003-06-26 15:44:03 +0000 |
| commit | 0e0026d70fe8096ec736ef6a6d998978587fcef3 (patch) | |
| tree | 1c874e3616d90d1016ccfc5096ffd1eab8e786d5 /sys/vm/vm_page.c | |
| parent | f0e747489fbed5a08eb65f7eb8a2179b63fe288e (diff) | |
| download | FreeBSD-src-0e0026d70fe8096ec736ef6a6d998978587fcef3.zip FreeBSD-src-0e0026d70fe8096ec736ef6a6d998978587fcef3.tar.gz | |
vm_page_select_cache() enforces a number of conditions on the returned
page. Add the ability to lock the containing object to those conditions.
Diffstat (limited to 'sys/vm/vm_page.c')
| -rw-r--r-- | sys/vm/vm_page.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c index ac13102..ac3cccc 100644 --- a/sys/vm/vm_page.c +++ b/sys/vm/vm_page.c @@ -719,7 +719,8 @@ vm_page_select_cache(vm_pindex_t color) while (TRUE) { m = vm_pageq_find(PQ_CACHE, color & PQ_L2_MASK, FALSE); if (m && ((m->flags & (PG_BUSY|PG_UNMANAGED)) || m->busy || - m->hold_count || m->wire_count)) { + m->hold_count || m->wire_count || + !VM_OBJECT_TRYLOCK(m->object))) { vm_page_deactivate(m); continue; } @@ -765,6 +766,7 @@ vm_page_select_free(vm_pindex_t color, boolean_t prefer_zero) vm_page_t vm_page_alloc(vm_object_t object, vm_pindex_t pindex, int req) { + vm_object_t m_object; vm_page_t m = NULL; vm_pindex_t color; int flags, page_req, s; @@ -820,10 +822,13 @@ loop: return (NULL); } KASSERT(m->dirty == 0, ("Found dirty cache page %p", m)); + m_object = m->object; + VM_OBJECT_LOCK_ASSERT(m_object, MA_OWNED); vm_page_busy(m); pmap_remove_all(m); vm_page_free(m); vm_page_unlock_queues(); + VM_OBJECT_UNLOCK(m_object); goto loop; } else { /* |
