Author: kib
Date: Fri Feb 2 11:56:30 2018
New Revision: 328773
URL: https://svnweb.freebsd.org/changeset/base/328773
Log:
On pageout, in vnode generic pager, for partially dirty page, only
clear dirty bits for completely invalid blocks.
Otherwise we might not write out the last chunk that is shorter than
512 bytes, if the file end is not aligned on disk block boundary.
This become important after the r324794.
PR: 225586
Reported by: tris_v...@hotmail.com
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Modified:
head/sys/vm/vnode_pager.c
Modified: head/sys/vm/vnode_pager.c
==============================================================================
--- head/sys/vm/vnode_pager.c Fri Feb 2 07:55:31 2018 (r328772)
+++ head/sys/vm/vnode_pager.c Fri Feb 2 11:56:30 2018 (r328773)
@@ -1266,6 +1266,8 @@ vnode_pager_generic_putpages(struct vnode *vp, vm_page
maxsize = object->un_pager.vnp.vnp_size - poffset;
ncount = btoc(maxsize);
if ((pgoff = (int)maxsize & PAGE_MASK) != 0) {
+ pgoff = roundup2(pgoff, DEV_BSIZE);
+
/*
* If the object is locked and the following
* conditions hold, then the page's dirty
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