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Give malloc(3) a barrier to allocate OVER... i.e. let the space at ease! 

Note that it could use an extra barrier too.
This commit is contained in:
reinoud 2011-08-23 18:37:51 +00:00
parent 35db8893df
commit f54c6f5d02
1 changed files with 11 additions and 2 deletions
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13
sys/arch/usermode/usermode/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.24 2011/08/23 16:16:26 jmcneill Exp $ */
/* $NetBSD: pmap.c,v 1.25 2011/08/23 18:37:51 reinoud Exp $ */
/*-
* Copyright (c) 2011 Reinoud Zandijk <reinoud@NetBSD.org>
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.24 2011/08/23 16:16:26 jmcneill Exp $");
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.25 2011/08/23 18:37:51 reinoud Exp $");
#include "opt_memsize.h"
#include "opt_kmempages.h"
@ -159,6 +159,15 @@ pmap_bootstrap(void)
kmem_user_end = kmem_user_start + 1024 * MEMSIZE;
/* TODO make a better user space size estimate */
/* claim dummy space over all we need just to make fun of sbrk */
addr = thunk_mmap((void*) kmem_data_end,
kmem_user_end - kmem_data_end,
PROT_NONE,
MAP_ANON | MAP_FIXED,
-1, 0);
if (addr != (void *) kmem_data_end)
panic("pmap_bootstrap: protection barrier failed\n");
if (kmem_user_end < kmem_user_start)
panic("pmap_bootstrap: to small memorysize specified");