[src/trunk]: src/sys/rump/librump/rumpvfs Clear PG_FAKE for pages we wrote to...

[pooka <pooka%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d1eaee58651a
branches:  trunk
changeset: 748238:d1eaee58651a
user:      pooka <pooka%NetBSD.org@localhost>
date:      Sun Oct 18 00:41:09 2009 +0000

description:
Clear PG_FAKE for pages we wrote to.  This avoids paging in data
we already have (and the backend might not yet have) in cases where
fs_bshift > PAGE_SHIFT.

diffstat:

 sys/rump/librump/rumpvfs/vm_vfs.c |  7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diffs (31 lines):

diff -r cb23871850dd -r d1eaee58651a sys/rump/librump/rumpvfs/vm_vfs.c
--- a/sys/rump/librump/rumpvfs/vm_vfs.c Sat Oct 17 23:43:22 2009 +0000
+++ b/sys/rump/librump/rumpvfs/vm_vfs.c Sun Oct 18 00:41:09 2009 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vm_vfs.c,v 1.12 2009/10/07 10:23:50 pooka Exp $        */
+/*     $NetBSD: vm_vfs.c,v 1.13 2009/10/18 00:41:09 pooka Exp $        */
 
 /*
  * Copyright (c) 2008 Antti Kantee.  All Rights Reserved.
@@ -29,7 +29,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vm_vfs.c,v 1.12 2009/10/07 10:23:50 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vm_vfs.c,v 1.13 2009/10/18 00:41:09 pooka Exp $");
 
 #include <sys/param.h>
 
@@ -157,10 +157,11 @@
 
                        pageoff = uio->uio_offset & PAGE_MASK;
                        xfersize = MIN(MIN(todo, PAGE_SIZE), PAGE_SIZE-pageoff);
+                       KASSERT(xfersize > 0);
                        uiomove((uint8_t *)pgs[i]->uanon + pageoff,
                            xfersize, uio);
                        if (uio->uio_rw == UIO_WRITE)
-                               pgs[i]->flags &= ~PG_CLEAN;
+                               pgs[i]->flags &= ~(PG_CLEAN | PG_FAKE);
                        todo -= xfersize;
                }
                uvm_page_unbusy(pgs, npages);