Author: kib
Date: Wed Feb 21 11:31:29 2018
New Revision: 329707
URL: https://svnweb.freebsd.org/changeset/base/329707
Log:
MFC r329254:
Ensure memory consistency on COW.
Modified:
stable/10/sys/vm/vm_fault.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/vm/vm_fault.c
==============================================================================
--- stable/10/sys/vm/vm_fault.c Wed Feb 21 11:29:07 2018 (r329706)
+++ stable/10/sys/vm/vm_fault.c Wed Feb 21 11:31:29 2018 (r329707)
@@ -893,6 +893,10 @@ readrest:
*/
pmap_copy_page(fs.m, fs.first_m);
fs.first_m->valid = VM_PAGE_BITS_ALL;
+ if ((fault_flags & VM_FAULT_WIRE) == 0) {
+ prot &= ~VM_PROT_WRITE;
+ fault_type &= ~VM_PROT_WRITE;
+ }
if (wired && (fault_flags &
VM_FAULT_WIRE) == 0) {
vm_page_lock(fs.first_m);
_______________________________________________
svn-src-all@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
