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Fixed bug where page modifications would be lost when swap space was

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almost depleted.

Reviewed by:	John Dyson
This commit is contained in:
David Greenman 1994-10-14 01:58:52 +00:00
parent defb6744ba
commit 2e1e24dd28
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=3573
1 changed files with 11 additions and 2 deletions
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13
sys/vm/swap_pager.c
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@ -39,7 +39,7 @@
* from: Utah $Hdr: swap_pager.c 1.4 91/04/30$
*
* @(#)swap_pager.c 8.9 (Berkeley) 3/21/94
* $Id: swap_pager.c,v 1.10 1994/10/09 01:52:04 phk Exp $
* $Id: swap_pager.c,v 1.11 1994/10/09 07:35:16 davidg Exp $
*/
/*
@ -1162,7 +1162,16 @@ swap_pager_input(swp, m, count, reqpage)
PAGE_WAKEUP(m[i]);
}
}
if( swap_pager_full) {
/*
* If we're out of swap space, then attempt to free
* some whenever pages are brought in. We must clear
* the clean flag so that the page contents will be
* preserved.
*/
if (swap_pager_full) {
for (i = 0; i < count; i++) {
m[i]->flags &= ~PG_CLEAN;
}
_swap_pager_freespace( swp, m[0]->offset+paging_offset, count*PAGE_SIZE);
}
} else {