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Revert my change from r361855 in favor of a better fix.

Browse Source 
Reviewed by:	markj, kib
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D25430
This commit is contained in:
Chuck Silvers 2020-07-17 23:08:01 +00:00
parent d8fd37e1e1
commit c3dbadc1fd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=363294
1 changed files with 22 additions and 24 deletions
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46
sys/vm/vnode_pager.c
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@ -1150,30 +1150,28 @@ vnode_pager_generic_getpages_done(struct buf *bp)
if (mt == bogus_page)
continue;
if (error == 0) {
if (nextoff <= object->un_pager.vnp.vnp_size) {
/*
* Read filled up entire page.
*/
vm_page_valid(mt);
KASSERT(mt->dirty == 0,
("%s: page %p is dirty", __func__, mt));
KASSERT(!pmap_page_is_mapped(mt),
("%s: page %p is mapped", __func__, mt));
} else {
/*
* Read did not fill up entire page.
*
* Currently we do not set the entire page
* valid, we just try to clear the piece that
* we couldn't read.
*/
vm_page_set_valid_range(mt, 0,
object->un_pager.vnp.vnp_size - tfoff);
KASSERT((mt->dirty & vm_page_bits(0,
object->un_pager.vnp.vnp_size - tfoff)) ==
0, ("%s: page %p is dirty", __func__, mt));
}
if (nextoff <= object->un_pager.vnp.vnp_size) {
/*
* Read filled up entire page.
*/
vm_page_valid(mt);
KASSERT(mt->dirty == 0,
("%s: page %p is dirty", __func__, mt));
KASSERT(!pmap_page_is_mapped(mt),
("%s: page %p is mapped", __func__, mt));
} else {
/*
* Read did not fill up entire page.
*
* Currently we do not set the entire page valid,
* we just try to clear the piece that we couldn't
* read.
*/
vm_page_set_valid_range(mt, 0,
object->un_pager.vnp.vnp_size - tfoff);
KASSERT((mt->dirty & vm_page_bits(0,
object->un_pager.vnp.vnp_size - tfoff)) == 0,
("%s: page %p is dirty", __func__, mt));
}
if (i < bp->b_pgbefore || i >= bp->b_npages - bp->b_pgafter)