svn commit: r359992 - head/sys/powerpc/aim
Alfredo Dal'Ava Junior
alfredo at FreeBSD.org
Wed Apr 15 20:33:10 UTC 2020
Author: alfredo
Date: Wed Apr 15 20:33:09 2020
New Revision: 359992
URL: https://svnweb.freebsd.org/changeset/base/359992
Log:
powerpc: autosize bpvo based on physical memory
Default moea64_bpvo_pool_size 327680 was insufficient for initial
memory mapping at boot time on systems with, for example, 64G and
no huge pages enabled.
Submitted by: Andre Silva <afscoelho at gmail.com>
Reviewed by: jhibbits, alfredo
Approved by: jhibbits (mentor)
Sponsored by: Eldorado Research Institute (eldorado.org.br)
Differential Revision: https://reviews.freebsd.org/D24102
Modified:
head/sys/powerpc/aim/mmu_oea64.c
Modified: head/sys/powerpc/aim/mmu_oea64.c
==============================================================================
--- head/sys/powerpc/aim/mmu_oea64.c Wed Apr 15 20:28:20 2020 (r359991)
+++ head/sys/powerpc/aim/mmu_oea64.c Wed Apr 15 20:33:09 2020 (r359992)
@@ -65,6 +65,7 @@ __FBSDID("$FreeBSD$");
#include <sys/systm.h>
#include <sys/vmmeter.h>
#include <sys/smp.h>
+#include <sys/reboot.h>
#include <sys/kdb.h>
@@ -184,10 +185,12 @@ uma_zone_t moea64_pvo_zone; /* zone for pvo entries */
static struct pvo_entry *moea64_bpvo_pool;
static int moea64_bpvo_pool_index = 0;
-static int moea64_bpvo_pool_size = 327680;
+static int moea64_bpvo_pool_size = 0;
SYSCTL_INT(_machdep, OID_AUTO, moea64_allocated_bpvo_entries, CTLFLAG_RD,
&moea64_bpvo_pool_index, 0, "");
+#define BPVO_POOL_SIZE 327680 /* Sensible historical default value */
+#define BPVO_POOL_EXPANSION_FACTOR 3
#define VSID_NBPW (sizeof(u_int32_t) * 8)
#ifdef __powerpc64__
#define NVSIDS (NPMAPS * 16)
@@ -916,6 +919,20 @@ moea64_mid_bootstrap(mmu_t mmup, vm_offset_t kernelsta
* Initialise the bootstrap pvo pool.
*/
TUNABLE_INT_FETCH("machdep.moea64_bpvo_pool_size", &moea64_bpvo_pool_size);
+ if (moea64_bpvo_pool_size == 0) {
+ if (!hw_direct_map)
+ moea64_bpvo_pool_size = ((ptoa((uintmax_t)physmem) * sizeof(struct vm_page)) /
+ (PAGE_SIZE * PAGE_SIZE)) * BPVO_POOL_EXPANSION_FACTOR;
+ else
+ moea64_bpvo_pool_size = BPVO_POOL_SIZE;
+ }
+
+ if (boothowto & RB_VERBOSE) {
+ printf("mmu_oea64: bpvo pool entries = %d, bpvo pool size = %ju MB\n",
+ moea64_bpvo_pool_size,
+ moea64_bpvo_pool_size*sizeof(struct pvo_entry) / 1048576);
+ }
+
moea64_bpvo_pool = (struct pvo_entry *)moea64_bootstrap_alloc(
moea64_bpvo_pool_size*sizeof(struct pvo_entry), PAGE_SIZE);
moea64_bpvo_pool_index = 0;
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