In vm_object_page_clean(), do not clean OBJ_MIGHTBEDIRTY object flag

if the filesystem performed short write and we are skipping the page
due to this.

Propogate write error from the pager back to the callers of
vm_pageout_flush().  Report the failure to write a page from the
requested range as the FALSE return value from vm_object_page_clean(),
and propagate it back to msync(2) to return EIO to usermode.

While there, convert the clearobjflags variable in the
vm_object_page_clean() and arguments of the helper functions to
boolean.

PR:	kern/165927
Reviewed by:	alc
MFC after:	2 weeks

1 files changed, 2 insertions, 1 deletions

diff --git a/sys/vm/vm_contig.c b/sys/vm/vm_contig.c
index 4deba5b..e29aaf7 100644
--- a/sys/vm/vm_contig.c
+++ b/sys/vm/vm_contig.c
@@ -137,7 +137,8 @@ vm_contig_launder_page(vm_page_t m, vm_page_t *next)
 			   object->type == OBJT_DEFAULT) {
 			vm_page_unlock_queues();
 			m_tmp = m;
-			vm_pageout_flush(&m_tmp, 1, VM_PAGER_PUT_SYNC, 0, NULL);
+			vm_pageout_flush(&m_tmp, 1, VM_PAGER_PUT_SYNC, 0,
+			    NULL, NULL);
 			VM_OBJECT_UNLOCK(object);
 			vm_page_lock_queues();
 			return (0);