diff options
| author | alc <alc@FreeBSD.org> | 2016-09-05 23:56:27 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2016-09-05 23:56:27 +0000 |
| commit | 852a8b050b91974586de9d220bb8c9d9ba5199fb (patch) | |
| tree | 2f8ac9f4d3a95a20d1dd7641c8472cac91087c6b /sys/kern/kern_exec.c | |
| parent | a52e00aaf9ea2bdd0994d3af2056de47db8d989d (diff) | |
| download | FreeBSD-src-852a8b050b91974586de9d220bb8c9d9ba5199fb.zip FreeBSD-src-852a8b050b91974586de9d220bb8c9d9ba5199fb.tar.gz | |
MFC r304102
Eliminate unneeded vm_page_xbusy() and vm_page_xunbusy() operations when
neither vm_pager_has_page() nor vm_pager_get_pages() is called.
Diffstat (limited to 'sys/kern/kern_exec.c')
| -rw-r--r-- | sys/kern/kern_exec.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sys/kern/kern_exec.c b/sys/kern/kern_exec.c index 3873c5a..e573672 100644 --- a/sys/kern/kern_exec.c +++ b/sys/kern/kern_exec.c @@ -984,8 +984,9 @@ exec_map_first_page(imgp) #if VM_NRESERVLEVEL > 0 vm_object_color(object, 0); #endif - ma[0] = vm_page_grab(object, 0, VM_ALLOC_NORMAL); + ma[0] = vm_page_grab(object, 0, VM_ALLOC_NORMAL | VM_ALLOC_NOBUSY); if (ma[0]->valid != VM_PAGE_BITS_ALL) { + vm_page_xbusy(ma[0]); if (!vm_pager_has_page(object, 0, NULL, &after)) { vm_page_lock(ma[0]); vm_page_free(ma[0]); @@ -1021,10 +1022,10 @@ exec_map_first_page(imgp) VM_OBJECT_WUNLOCK(object); return (EIO); } + vm_page_xunbusy(ma[0]); for (i = 1; i < initial_pagein; i++) vm_page_readahead_finish(ma[i]); } - vm_page_xunbusy(ma[0]); vm_page_lock(ma[0]); vm_page_hold(ma[0]); vm_page_activate(ma[0]); |
