diff options
| author | alc <alc@FreeBSD.org> | 2002-09-02 04:04:12 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2002-09-02 04:04:12 +0000 |
| commit | 0f13b0cacabdd3980a4b8b0c95680cf4a3cdc72b (patch) | |
| tree | 975d74f6cbda496c6cf3c6d805bf1a9455c48c80 /sys/vm/vm_page.c | |
| parent | bb1016da55bc396e548c721c5bed3495697cef7d (diff) | |
| download | FreeBSD-src-0f13b0cacabdd3980a4b8b0c95680cf4a3cdc72b.zip FreeBSD-src-0f13b0cacabdd3980a4b8b0c95680cf4a3cdc72b.tar.gz | |
o Synchronize updates to struct vm_page::cow with the page queues lock.
Diffstat (limited to 'sys/vm/vm_page.c')
| -rw-r--r-- | sys/vm/vm_page.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c index 637d2c0..535f566 100644 --- a/sys/vm/vm_page.c +++ b/sys/vm/vm_page.c @@ -1812,10 +1812,9 @@ void vm_page_cowclear(vm_page_t m) { - /* XXX KDM find out if giant is required here. */ - GIANT_REQUIRED; + mtx_assert(&vm_page_queue_mtx, MA_OWNED); if (m->cow) { - atomic_subtract_int(&m->cow, 1); + m->cow--; /* * let vm_fault add back write permission lazily */ @@ -1828,9 +1827,9 @@ vm_page_cowclear(vm_page_t m) void vm_page_cowsetup(vm_page_t m) { - /* XXX KDM find out if giant is required here */ - GIANT_REQUIRED; - atomic_add_int(&m->cow, 1); + + mtx_assert(&vm_page_queue_mtx, MA_OWNED); + m->cow++; vm_page_protect(m, VM_PROT_READ); } |
