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Allow changing the per-cpu emergency page reservation via kernel config.

This commit is contained in:
joerg 2015-04-11 19:24:13 +00:00
parent f4897efe88
commit 3350a13f64
2 changed files with 9 additions and 5 deletions
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4
sys/uvm/files.uvm
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@ -1,10 +1,10 @@
# $NetBSD: files.uvm,v 1.22 2014/10/10 09:01:01 uebayasi Exp $ # $NetBSD: files.uvm,v 1.23 2015/04/11 19:24:13 joerg Exp $
# #
# UVM options # UVM options
# #
defflag opt_uvmhist.h UVMHIST UVMHIST_PRINT: KERNHIST defflag opt_uvmhist.h UVMHIST UVMHIST_PRINT: KERNHIST
defflag opt_uvm.h USE_TOPDOWN_VM UVMMAP_COUNTERS defflag opt_uvm.h USE_TOPDOWN_VM UVMMAP_COUNTERS UVM_RESERVED_PAGES_PER_CPU
defflag opt_vmswap.h VMSWAP defflag opt_vmswap.h VMSWAP
defflag opt_readahead.h READAHEAD_STATS defflag opt_readahead.h READAHEAD_STATS
defflag opt_ubc.h UBC_STATS defflag opt_ubc.h UBC_STATS

10
sys/uvm/uvm_page.c
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_page.c,v 1.186 2014/09/05 05:36:21 matt Exp $ */ /* $NetBSD: uvm_page.c,v 1.187 2015/04/11 19:24:13 joerg Exp $ */
/* /*
* Copyright (c) 1997 Charles D. Cranor and Washington University. * Copyright (c) 1997 Charles D. Cranor and Washington University.
@ -66,9 +66,10 @@
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uvm_page.c,v 1.186 2014/09/05 05:36:21 matt Exp $"); __KERNEL_RCSID(0, "$NetBSD: uvm_page.c,v 1.187 2015/04/11 19:24:13 joerg Exp $");
#include "opt_ddb.h" #include "opt_ddb.h"
#include "opt_uvm.h"
#include "opt_uvmhist.h" #include "opt_uvmhist.h"
#include "opt_readahead.h" #include "opt_readahead.h"
@ -107,7 +108,10 @@ bool vm_page_zero_enable = false;
/* /*
* number of pages per-CPU to reserve for the kernel. * number of pages per-CPU to reserve for the kernel.
*/ */
int vm_page_reserve_kernel = 5; #ifndef UVM_RESERVED_PAGES_PER_CPU
#define UVM_RESERVED_PAGES_PER_CPU 5
#endif
int vm_page_reserve_kernel = UVM_RESERVED_PAGES_PER_CPU;
/* /*
* physical memory size; * physical memory size;