Author: kib
Date: Mon Apr 6 18:47:15 2020
New Revision: 359664
URL: https://svnweb.freebsd.org/changeset/base/359664
Log:
MFC r359464:
buffer pager: skip bogus pages.
PR: 244713
Modified:
stable/12/sys/kern/vfs_bio.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/kern/vfs_bio.c
==============================================================================
--- stable/12/sys/kern/vfs_bio.c Mon Apr 6 18:45:05 2020
(r359663)
+++ stable/12/sys/kern/vfs_bio.c Mon Apr 6 18:47:15 2020
(r359664)
@@ -5185,13 +5185,17 @@ vfs_bio_getpages(struct vnode *vp, vm_page_t *ma, int
!= 0) ? GB_UNMAPPED : 0;
VM_OBJECT_WLOCK(object);
again:
- for (i = 0; i < count; i++)
- vm_page_busy_downgrade(ma[i]);
+ for (i = 0; i < count; i++) {
+ if (ma[i] != bogus_page)
+ vm_page_busy_downgrade(ma[i]);
+ }
VM_OBJECT_WUNLOCK(object);
lbnp = -1;
for (i = 0; i < count; i++) {
m = ma[i];
+ if (m == bogus_page)
+ continue;
/*
* Pages are shared busy and the object lock is not
@@ -5263,6 +5267,8 @@ end_pages:
VM_OBJECT_WLOCK(object);
redo = false;
for (i = 0; i < count; i++) {
+ if (ma[i] == bogus_page)
+ continue;
vm_page_sunbusy(ma[i]);
ma[i] = vm_page_grab(object, ma[i]->pindex, VM_ALLOC_NORMAL);
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