Author: kib
Date: Thu Aug 8 06:00:42 2013
New Revision: 254086
URL: http://svnweb.freebsd.org/changeset/base/254086
Log:
MFC r253187:
Do not invalidate page of the B_NOCACHE buffer or buffer after an I/O
error if any user wired mappings exist.
Modified:
stable/9/sys/kern/vfs_bio.c
Directory Properties:
stable/9/sys/ (props changed)
Modified: stable/9/sys/kern/vfs_bio.c
==============================================================================
--- stable/9/sys/kern/vfs_bio.c Thu Aug 8 05:52:41 2013 (r254085)
+++ stable/9/sys/kern/vfs_bio.c Thu Aug 8 06:00:42 2013 (r254086)
@@ -1614,7 +1614,8 @@ brelse(struct buf *bp)
(PAGE_SIZE - poffset) : resid;
KASSERT(presid >= 0, ("brelse: extra page"));
- vm_page_set_invalid(m, poffset, presid);
+ if (pmap_page_wired_mappings(m) == 0)
+ vm_page_set_invalid(m, poffset, presid);
if (had_bogus)
printf("avoided corruption bug in
bogus_page/brelse code\n");
}
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