[IA64] Quicklist support for IA64
Christoph Lameter [Fri, 11 May 2007 05:42:53 +0000 (22:42 -0700)]
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/Kconfig
arch/ia64/mm/contig.c
arch/ia64/mm/discontig.c
arch/ia64/mm/init.c
include/asm-ia64/pgalloc.h

index 6e41471..de1bff6 100644 (file)
@@ -31,6 +31,10 @@ config ZONE_DMA
        def_bool y
        depends on !IA64_SGI_SN2
 
+config QUICKLIST
+       bool
+       default y
+
 config MMU
        bool
        default y
index 44ce5ed..7ac8592 100644 (file)
@@ -88,7 +88,7 @@ void show_mem(void)
        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 9484444..38085ac 100644 (file)
@@ -561,7 +561,7 @@ void show_mem(void)
        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 cffb1e8..c14abef 100644 (file)
@@ -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 @@ EXPORT_SYMBOL(vmem_map);
 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 560c287..67552ca 100644 (file)
 #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 @@ pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
 
 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 @@ pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
 
 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 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
 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 */