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Change filesystem buffer cache size calculation to be less for 4MB

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machines (now 20% of all memory after the first 3MB). This is necessary
in order for 4MB machine to be able to rebuild the entire source tree
and not run out of physical memory because of fixed memory requirements
of processes and kernel VM.
This commit is contained in:
David Greenman 1993-10-29 08:58:34 +00:00
parent 4506032117
commit 03cfe1fd06
2 changed files with 4 additions and 4 deletions
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4
sys/amd64/amd64/machdep.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
* $Id: machdep.c,v 1.11 1993/10/14 18:15:35 rgrimes Exp $
* $Id: machdep.c,v 1.12 1993/10/15 10:34:22 rgrimes Exp $
*/
#include "npx.h"
@ -203,7 +203,7 @@ again:
* We allocate 1/2 as many swap buffer headers as file i/o buffers.
*/
if (bufpages == 0)
bufpages = (ctob(physmem) - 2048*1024) / NBPG / 5;
bufpages = (physmem << PAGE_SHIFT - 3072*1024) / NBPG / 5;
if (bufpages < 32)
bufpages = 32;

4
sys/i386/i386/machdep.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
* $Id: machdep.c,v 1.11 1993/10/14 18:15:35 rgrimes Exp $
* $Id: machdep.c,v 1.12 1993/10/15 10:34:22 rgrimes Exp $
*/
#include "npx.h"
@ -203,7 +203,7 @@ again:
* We allocate 1/2 as many swap buffer headers as file i/o buffers.
*/
if (bufpages == 0)
bufpages = (ctob(physmem) - 2048*1024) / NBPG / 5;
bufpages = (physmem << PAGE_SHIFT - 3072*1024) / NBPG / 5;
if (bufpages < 32)
bufpages = 32;