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[PATCH] More __read_mostly variables 

Move some more frequently read variables that showed up during some of our
performance tests as sometimes ending up in hot cachelines to the
read_mostly section.

Fix: Move the __read_mostly from before hpet_usec_quotient to follow the
variable like the other uses of __read_mostly.

Signed-off-by: Alok N Kataria <alokk@calsoftinc.com>
Signed-off-by: Christoph Lameter <christoph@scalex86.org>
Signed-off-by: Shai Fultheim <shai@scalex86.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Lameter 2005-09-06 15:16:33 -07:00 committed by Linus Torvalds
parent b3dbb4ecd4
commit c3d8c14145
4 changed files with 7 additions and 7 deletions
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2
arch/i386/kernel/setup.c
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@ -82,7 +82,7 @@ EXPORT_SYMBOL(efi_enabled);
/* cpu data as detected by the assembly code in head.S */
struct cpuinfo_x86 new_cpu_data __initdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
/* common cpu data for all cpus */
struct cpuinfo_x86 boot_cpu_data = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
EXPORT_SYMBOL(boot_cpu_data);
unsigned long mmu_cr4_features;

2
arch/i386/kernel/timers/timer_hpet.c
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@ -18,7 +18,7 @@
#include "mach_timer.h"
#include <asm/hpet.h>
static unsigned long __read_mostly hpet_usec_quotient; /* convert hpet clks to usec */
static unsigned long hpet_usec_quotient __read_mostly; /* convert hpet clks to usec */
static unsigned long tsc_hpet_quotient; /* convert tsc to hpet clks */
static unsigned long hpet_last; /* hpet counter value at last tick*/
static unsigned long last_tsc_low; /* lsb 32 bits of Time Stamp Counter */

2
mm/mmap.c
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@ -61,7 +61,7 @@ pgprot_t protection_map[16] = {
int sysctl_overcommit_memory = OVERCOMMIT_GUESS; /* heuristic overcommit */
int sysctl_overcommit_ratio = 50; /* default is 50% */
int sysctl_max_map_count = DEFAULT_MAX_MAP_COUNT;
int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT;
atomic_t vm_committed_space = ATOMIC_INIT(0);
/*

8
mm/page_alloc.c
View File

@ -42,11 +42,11 @@
* MCD - HACK: Find somewhere to initialize this EARLY, or make this
* initializer cleaner
*/
nodemask_t node_online_map = { { [0] = 1UL } };
nodemask_t node_online_map __read_mostly = { { [0] = 1UL } };
EXPORT_SYMBOL(node_online_map);
nodemask_t node_possible_map = NODE_MASK_ALL;
nodemask_t node_possible_map __read_mostly = NODE_MASK_ALL;
EXPORT_SYMBOL(node_possible_map);
struct pglist_data *pgdat_list;
struct pglist_data *pgdat_list __read_mostly;
unsigned long totalram_pages;
unsigned long totalhigh_pages;
long nr_swap_pages;
@ -68,7 +68,7 @@ EXPORT_SYMBOL(nr_swap_pages);
* Used by page_zone() to look up the address of the struct zone whose
* id is encoded in the upper bits of page->flags
*/
struct zone *zone_table[1 << ZONETABLE_SHIFT];
struct zone *zone_table[1 << ZONETABLE_SHIFT] __read_mostly;
EXPORT_SYMBOL(zone_table);
static char *zone_names[MAX_NR_ZONES] = { "DMA", "Normal", "HighMem" };