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Make B_NOCACHE and B_INVAL buffers work correctly - throw away the data in

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the page cache.

Submitted by:	John Dyson
This commit is contained in:
David Greenman 1995-02-03 03:35:56 +00:00
parent 3e03108763
commit b82c50c4e6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=6147
1 changed files with 5 additions and 2 deletions
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7
sys/kern/vfs_bio.c
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@ -18,7 +18,7 @@
* 5. Modifications may be freely made to this file if the above conditions
* are met.
*
* $Id: vfs_bio.c,v 1.25 1995/01/24 10:00:43 davidg Exp $
* $Id: vfs_bio.c,v 1.26 1995/01/26 03:34:31 davidg Exp $
*/
/*
@ -433,7 +433,10 @@ brelse(struct buf * bp)
--m->bmapped;
if (m->bmapped == 0) {
PAGE_WAKEUP(m);
if ((m->dirty & m->valid) == 0 &&
if (m->valid == 0) {
pmap_page_protect(VM_PAGE_TO_PHYS(m), VM_PROT_NONE);
vm_page_free(m);
} else if ((m->dirty & m->valid) == 0 &&
(m->flags & PG_REFERENCED) == 0 &&
!pmap_is_referenced(VM_PAGE_TO_PHYS(m)))
vm_page_cache(m);