diff options
| author | alc <alc@FreeBSD.org> | 2003-01-12 23:32:46 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2003-01-12 23:32:46 +0000 |
| commit | fe540b81bb4ea3115544cd0f082b4ecd39cebb62 (patch) | |
| tree | bb9a83f5f6b4b04a835cb3a1f0f956a715003e55 /sys/vm | |
| parent | 0ea76fc6bce84d6a57a429ca96600420de1cb495 (diff) | |
| download | FreeBSD-src-fe540b81bb4ea3115544cd0f082b4ecd39cebb62.zip FreeBSD-src-fe540b81bb4ea3115544cd0f082b4ecd39cebb62.tar.gz | |
Make vm_page_alloc() return PG_ZERO only if VM_ALLOC_ZERO is specified.
The objective being to eliminate some cases of page queues locking.
(See, for example, vm/vm_fault.c revision 1.160.)
Reviewed by: tegge
(Also, pointed out by tegge that I changed vm_fault.c before changing
vm_page.c. Oops.)
Diffstat (limited to 'sys/vm')
| -rw-r--r-- | sys/vm/vm_page.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c index a96b8ac..56abce4 100644 --- a/sys/vm/vm_page.c +++ b/sys/vm/vm_page.c @@ -755,7 +755,7 @@ vm_page_alloc(vm_object_t object, vm_pindex_t pindex, int req) { vm_page_t m = NULL; vm_pindex_t color; - int page_req, s; + int flags, page_req, s; page_req = req & VM_ALLOC_CLASS_MASK; @@ -844,12 +844,13 @@ loop: /* * Initialize structure. Only the PG_ZERO flag is inherited. */ + flags = PG_BUSY; if (m->flags & PG_ZERO) { vm_page_zero_count--; - m->flags = PG_ZERO | PG_BUSY; - } else { - m->flags = PG_BUSY; + if (req & VM_ALLOC_ZERO) + flags = PG_ZERO | PG_BUSY; } + m->flags = flags; if (req & VM_ALLOC_WIRED) { atomic_add_int(&cnt.v_wire_count, 1); m->wire_count = 1; |
