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Subject[QUICKLIST 2/4] Quicklist support for IA64
Date
Quicklist for IA64

IA64 is the origin of the quicklist implementation. So cut out the pieces
that are now in core code and modify the functions called.

Signed-off-by: Christoph Lameter <clameter@sgi.com>

Index: linux-2.6.21-rc5-mm4/arch/ia64/mm/init.c
===================================================================
--- linux-2.6.21-rc5-mm4.orig/arch/ia64/mm/init.c 2007-04-07 16:20:16.000000000 -0700
+++ linux-2.6.21-rc5-mm4/arch/ia64/mm/init.c 2007-04-07 18:02:51.000000000 -0700
@@ -39,9 +39,6 @@

DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);

-DEFINE_PER_CPU(unsigned long *, __pgtable_quicklist);
-DEFINE_PER_CPU(long, __pgtable_quicklist_size);
-
extern void ia64_tlb_init (void);

unsigned long MAX_DMA_ADDRESS = PAGE_OFFSET + 0x100000000UL;
@@ -56,54 +53,6 @@
struct page *zero_page_memmap_ptr; /* map entry for zero page */
EXPORT_SYMBOL(zero_page_memmap_ptr);

-#define MIN_PGT_PAGES 25UL
-#define MAX_PGT_FREES_PER_PASS 16L
-#define PGT_FRACTION_OF_NODE_MEM 16
-
-static inline long
-max_pgt_pages(void)
-{
- u64 node_free_pages, max_pgt_pages;
-
-#ifndef CONFIG_NUMA
- node_free_pages = nr_free_pages();
-#else
- node_free_pages = node_page_state(numa_node_id(), NR_FREE_PAGES);
-#endif
- max_pgt_pages = node_free_pages / PGT_FRACTION_OF_NODE_MEM;
- max_pgt_pages = max(max_pgt_pages, MIN_PGT_PAGES);
- return max_pgt_pages;
-}
-
-static inline long
-min_pages_to_free(void)
-{
- long pages_to_free;
-
- pages_to_free = pgtable_quicklist_size - max_pgt_pages();
- pages_to_free = min(pages_to_free, MAX_PGT_FREES_PER_PASS);
- return pages_to_free;
-}
-
-void
-check_pgt_cache(void)
-{
- long pages_to_free;
-
- if (unlikely(pgtable_quicklist_size <= MIN_PGT_PAGES))
- return;
-
- preempt_disable();
- while (unlikely((pages_to_free = min_pages_to_free()) > 0)) {
- while (pages_to_free--) {
- free_page((unsigned long)pgtable_quicklist_alloc());
- }
- preempt_enable();
- preempt_disable();
- }
- preempt_enable();
-}
-
void
lazy_mmu_prot_update (pte_t pte)
{
Index: linux-2.6.21-rc5-mm4/include/asm-ia64/pgalloc.h
===================================================================
--- linux-2.6.21-rc5-mm4.orig/include/asm-ia64/pgalloc.h 2007-03-25 15:56:23.000000000 -0700
+++ linux-2.6.21-rc5-mm4/include/asm-ia64/pgalloc.h 2007-04-07 18:02:51.000000000 -0700
@@ -18,71 +18,18 @@
#include <linux/mm.h>
#include <linux/page-flags.h>
#include <linux/threads.h>
+#include <linux/quicklist.h>

#include <asm/mmu_context.h>

-DECLARE_PER_CPU(unsigned long *, __pgtable_quicklist);
-#define pgtable_quicklist __ia64_per_cpu_var(__pgtable_quicklist)
-DECLARE_PER_CPU(long, __pgtable_quicklist_size);
-#define pgtable_quicklist_size __ia64_per_cpu_var(__pgtable_quicklist_size)
-
-static inline long pgtable_quicklist_total_size(void)
-{
- long ql_size = 0;
- int cpuid;
-
- for_each_online_cpu(cpuid) {
- ql_size += per_cpu(__pgtable_quicklist_size, cpuid);
- }
- return ql_size;
-}
-
-static inline void *pgtable_quicklist_alloc(void)
-{
- unsigned long *ret = NULL;
-
- preempt_disable();
-
- ret = pgtable_quicklist;
- if (likely(ret != NULL)) {
- pgtable_quicklist = (unsigned long *)(*ret);
- ret[0] = 0;
- --pgtable_quicklist_size;
- preempt_enable();
- } else {
- preempt_enable();
- ret = (unsigned long *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
- }
-
- return ret;
-}
-
-static inline void pgtable_quicklist_free(void *pgtable_entry)
-{
-#ifdef CONFIG_NUMA
- int nid = page_to_nid(virt_to_page(pgtable_entry));
-
- if (unlikely(nid != numa_node_id())) {
- free_page((unsigned long)pgtable_entry);
- return;
- }
-#endif
-
- preempt_disable();
- *(unsigned long *)pgtable_entry = (unsigned long)pgtable_quicklist;
- pgtable_quicklist = (unsigned long *)pgtable_entry;
- ++pgtable_quicklist_size;
- preempt_enable();
-}
-
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
- return pgtable_quicklist_alloc();
+ return quicklist_alloc(0, GFP_KERNEL, NULL);
}

static inline void pgd_free(pgd_t * pgd)
{
- pgtable_quicklist_free(pgd);
+ quicklist_free(0, NULL, pgd);
}

#ifdef CONFIG_PGTABLE_4
@@ -94,12 +41,12 @@

static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
{
- return pgtable_quicklist_alloc();
+ return quicklist_alloc(0, GFP_KERNEL, NULL);
}

static inline void pud_free(pud_t * pud)
{
- pgtable_quicklist_free(pud);
+ quicklist_free(0, NULL, pud);
}
#define __pud_free_tlb(tlb, pud) pud_free(pud)
#endif /* CONFIG_PGTABLE_4 */
@@ -112,12 +59,12 @@

static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
- return pgtable_quicklist_alloc();
+ return quicklist_alloc(0, GFP_KERNEL, NULL);
}

static inline void pmd_free(pmd_t * pmd)
{
- pgtable_quicklist_free(pmd);
+ quicklist_free(0, NULL, pmd);
}

#define __pmd_free_tlb(tlb, pmd) pmd_free(pmd)
@@ -137,28 +84,31 @@
static inline struct page *pte_alloc_one(struct mm_struct *mm,
unsigned long addr)
{
- void *pg = pgtable_quicklist_alloc();
+ void *pg = quicklist_alloc(0, GFP_KERNEL, NULL);
return pg ? virt_to_page(pg) : NULL;
}

static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long addr)
{
- return pgtable_quicklist_alloc();
+ return quicklist_alloc(0, GFP_KERNEL, NULL);
}

static inline void pte_free(struct page *pte)
{
- pgtable_quicklist_free(page_address(pte));
+ quicklist_free_page(0, NULL, pte);
}

static inline void pte_free_kernel(pte_t * pte)
{
- pgtable_quicklist_free(pte);
+ quicklist_free(0, NULL, pte);
}

-#define __pte_free_tlb(tlb, pte) pte_free(pte)
+static inline void check_pgt_cache(void)
+{
+ quicklist_trim(0, NULL, 25, 16);
+}

-extern void check_pgt_cache(void);
+#define __pte_free_tlb(tlb, pte) pte_free(pte)

#endif /* _ASM_IA64_PGALLOC_H */
Index: linux-2.6.21-rc5-mm4/arch/ia64/mm/contig.c
===================================================================
--- linux-2.6.21-rc5-mm4.orig/arch/ia64/mm/contig.c 2007-04-07 16:20:07.000000000 -0700
+++ linux-2.6.21-rc5-mm4/arch/ia64/mm/contig.c 2007-04-07 18:02:51.000000000 -0700
@@ -88,7 +88,7 @@
printk(KERN_INFO "%d pages shared\n", total_shared);
printk(KERN_INFO "%d pages swap cached\n", total_cached);
printk(KERN_INFO "Total of %ld pages in page table cache\n",
- pgtable_quicklist_total_size());
+ quicklist_total_size());
printk(KERN_INFO "%d free buffer pages\n", nr_free_buffer_pages());
}

Index: linux-2.6.21-rc5-mm4/arch/ia64/mm/discontig.c
===================================================================
--- linux-2.6.21-rc5-mm4.orig/arch/ia64/mm/discontig.c 2007-04-07 17:59:49.000000000 -0700
+++ linux-2.6.21-rc5-mm4/arch/ia64/mm/discontig.c 2007-04-07 18:02:51.000000000 -0700
@@ -636,7 +636,7 @@
printk(KERN_INFO "%d pages shared\n", total_shared);
printk(KERN_INFO "%d pages swap cached\n", total_cached);
printk(KERN_INFO "Total of %ld pages in page table cache\n",
- pgtable_quicklist_total_size());
+ quicklist_total_size());
printk(KERN_INFO "%d free buffer pages\n", nr_free_buffer_pages());
}

Index: linux-2.6.21-rc5-mm4/arch/ia64/Kconfig
===================================================================
--- linux-2.6.21-rc5-mm4.orig/arch/ia64/Kconfig 2007-04-07 17:59:49.000000000 -0700
+++ linux-2.6.21-rc5-mm4/arch/ia64/Kconfig 2007-04-07 18:02:51.000000000 -0700
@@ -30,6 +30,10 @@
def_bool y
depends on !IA64_SGI_SN2

+config QUICKLIST
+ bool
+ default y
+
config MMU
bool
default y
-
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