diff options
Diffstat (limited to 'sys/arch/arc')
| -rw-r--r-- | sys/arch/arc/arc/machdep.c | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/sys/arch/arc/arc/machdep.c b/sys/arch/arc/arc/machdep.c index 755fd0f1954..36aba12888a 100644 --- a/sys/arch/arc/arc/machdep.c +++ b/sys/arch/arc/arc/machdep.c @@ -1,4 +1,4 @@ -/* $OpenBSD: machdep.c,v 1.17 1997/01/28 03:54:52 deraadt Exp $ */ +/* $OpenBSD: machdep.c,v 1.18 1997/02/01 11:02:41 deraadt Exp $ */ /* * Copyright (c) 1988 University of Utah. * Copyright (c) 1992, 1993 @@ -38,7 +38,7 @@ * SUCH DAMAGE. * * from: @(#)machdep.c 8.3 (Berkeley) 1/12/94 - * $Id: machdep.c,v 1.17 1997/01/28 03:54:52 deraadt Exp $ + * $Id: machdep.c,v 1.18 1997/02/01 11:02:41 deraadt Exp $ */ /* from: Utah Hdr: machdep.c 1.63 91/04/24 */ @@ -406,6 +406,10 @@ mips_init(argc, argv, code) valloc(msqids, struct msqid_ds, msginfo.msgmni); #endif +#ifndef BUFCACHEPERCENT +#define BUFCACHEPERCENT 5 +#endif + /* * Determine how many buffers to allocate. * We allocate more buffer space than the BSD standard of @@ -413,13 +417,29 @@ mips_init(argc, argv, code) * We just allocate a flat 10%. Ensure a minimum of 16 buffers. * We allocate 1/2 as many swap buffer headers as file i/o buffers. */ - if (bufpages == 0) - bufpages = physmem / 10 / CLSIZE; + if (bufpages == 0) { + if (physmem < btoc(2 * 1024 * 1024)) + bufpages = physmem / (10 * CLSIZE); + else + bufpages = (btoc(2 * 1024 * 1024) + physmem) / + ((100/BUFCACHEPERCENT) * CLSIZE); + } if (nbuf == 0) { nbuf = bufpages; if (nbuf < 16) nbuf = 16; } + + /* Restrict to at most 70% filled kvm */ + if (nbuf * MAXBSIZE > + (VM_MAX_KERNEL_ADDRESS-VM_MIN_KERNEL_ADDRESS) * 7 / 10) + nbuf = (VM_MAX_KERNEL_ADDRESS-VM_MIN_KERNEL_ADDRESS) / + MAXBSIZE * 7 / 10; + + /* More buffer pages than fits into the buffers is senseless. */ + if (bufpages > nbuf * MAXBSIZE / CLBYTES) + bufpages = nbuf * MAXBSIZE / CLBYTES; + if (nswbuf == 0) { nswbuf = (nbuf / 2) &~ 1; /* force even */ if (nswbuf > 256) @@ -561,6 +581,12 @@ cpu_startup() panic("startup: cannot allocate buffers"); base = bufpages / nbuf; residual = bufpages % nbuf; + if (base >= MAXBSIZE / CLBYTES) { + /* don't want to alloc more physical mem than needed */ + base = MAXBSIZE / CLBYTES; + residual = 0; + } + for (i = 0; i < nbuf; i++) { vm_size_t curbufsize; vm_offset_t curbuf; |