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FRV: Replace pgd management via slabs through quicklists

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This is done in order to be able to run SLUB which expects no modifications
to its page structs.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Lameter 2007-05-09 02:32:48 -07:00 committed by Linus Torvalds
parent 34013886ef
commit 8defab3377
4 changed files with 23 additions and 15 deletions
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8
arch/frv/Kconfig
View file

@ -45,6 +45,10 @@ config TIME_LOW_RES
bool
default y
config QUICKLIST
bool
default y
config ARCH_HAS_ILOG2_U32
bool
default y
@ -53,10 +57,6 @@ config ARCH_HAS_ILOG2_U64
bool
default y
config ARCH_USES_SLAB_PAGE_STRUCT
bool
default y
mainmenu "Fujitsu FR-V Kernel Configuration"
source "init/Kconfig"

4
arch/frv/kernel/process.c
View file

@ -25,12 +25,14 @@
#include <linux/elf.h>
#include <linux/reboot.h>
#include <linux/interrupt.h>
#include <linux/pagemap.h>
#include <asm/asm-offsets.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/setup.h>
#include <asm/pgtable.h>
#include <asm/tlb.h>
#include <asm/gdb-stub.h>
#include <asm/mb-regs.h>
@ -88,6 +90,8 @@ void cpu_idle(void)
while (!need_resched()) {
irq_stat[cpu].idle_timestamp = jiffies;
check_pgt_cache();
if (!frv_dma_inprogress && idle)
idle();
}

22
arch/frv/mm/pgalloc.c
View file

@ -13,12 +13,12 @@
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/quicklist.h>
#include <asm/pgalloc.h>
#include <asm/page.h>
#include <asm/cacheflush.h>
pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__((aligned(PAGE_SIZE)));
struct kmem_cache *pgd_cache;
pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
{
@ -100,7 +100,7 @@ static inline void pgd_list_del(pgd_t *pgd)
set_page_private(next, (unsigned long) pprev);
}
void pgd_ctor(void *pgd, struct kmem_cache *cache, unsigned long unused)
void pgd_ctor(void *pgd)
{
unsigned long flags;
@ -120,7 +120,7 @@ void pgd_ctor(void *pgd, struct kmem_cache *cache, unsigned long unused)
}
/* never called when PTRS_PER_PMD > 1 */
void pgd_dtor(void *pgd, struct kmem_cache *cache, unsigned long unused)
void pgd_dtor(void *pgd)
{
unsigned long flags; /* can be called from interrupt context */
@ -133,7 +133,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
{
pgd_t *pgd;
pgd = kmem_cache_alloc(pgd_cache, GFP_KERNEL);
pgd = quicklist_alloc(0, GFP_KERNEL, pgd_ctor);
if (!pgd)
return pgd;
@ -143,15 +143,15 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
void pgd_free(pgd_t *pgd)
{
/* in the non-PAE case, clear_page_tables() clears user pgd entries */
kmem_cache_free(pgd_cache, pgd);
quicklist_free(0, pgd_dtor, pgd);
}
void __init pgtable_cache_init(void)
{
pgd_cache = kmem_cache_create("pgd",
PTRS_PER_PGD * sizeof(pgd_t),
PTRS_PER_PGD * sizeof(pgd_t),
SLAB_PANIC,
pgd_ctor,
pgd_dtor);
}
void check_pgt_cache(void)
{
quicklist_trim(0, pgd_dtor, 25, 16);
}

4
include/asm-frv/tlb.h
View file

@ -3,7 +3,11 @@
#include <asm/tlbflush.h>
#ifdef CONFIG_MMU
extern void check_pgt_cache(void);
#else
#define check_pgt_cache() do {} while(0)
#endif
/*
* we don't need any special per-pte or per-vma handling...