From: Hugh Dickins Date: Sun, 30 Oct 2005 01:16:13 +0000 (-0700) Subject: [PATCH] mm: copy_one_pte inc rss X-Git-Tag: v2.6.15-rc1~730^2^2~53 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=8c10376271e097fa13cda956e1b2f3cb7e4d4dd9;p=linux-2.6-omap-h63xx.git [PATCH] mm: copy_one_pte inc rss Small adjustment, following Nick's suggestion: it's more straightforward for copy_pte_range to let copy_one_pte do the rss incrementation, than use an index it passed back. Saves a #define, and 16 bytes of .text. Signed-off-by: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/memory.c b/mm/memory.c index e83f9440bb6..7893eb4bb8c 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -340,8 +340,6 @@ static inline void add_mm_rss(struct mm_struct *mm, int file_rss, int anon_rss) add_mm_counter(mm, anon_rss, anon_rss); } -#define NO_RSS 2 /* Increment neither file_rss nor anon_rss */ - /* * This function is called to print an error when a pte in a * !VM_RESERVED region is found pointing to an invalid pfn (which @@ -368,16 +366,15 @@ void print_bad_pte(struct vm_area_struct *vma, pte_t pte, unsigned long vaddr) * but may be dropped within p[mg]d_alloc() and pte_alloc_map(). */ -static inline int +static inline void copy_one_pte(struct mm_struct *dst_mm, struct mm_struct *src_mm, pte_t *dst_pte, pte_t *src_pte, struct vm_area_struct *vma, - unsigned long addr) + unsigned long addr, int *rss) { unsigned long vm_flags = vma->vm_flags; pte_t pte = *src_pte; struct page *page; unsigned long pfn; - int anon = NO_RSS; /* pte contains position in swap or file, so copy. */ if (unlikely(!pte_present(pte))) { @@ -428,11 +425,10 @@ copy_one_pte(struct mm_struct *dst_mm, struct mm_struct *src_mm, pte = pte_mkold(pte); get_page(page); page_dup_rmap(page); - anon = !!PageAnon(page); + rss[!!PageAnon(page)]++; out_set_pte: set_pte_at(dst_mm, addr, dst_pte, pte); - return anon; } static int copy_pte_range(struct mm_struct *dst_mm, struct mm_struct *src_mm, @@ -441,7 +437,7 @@ static int copy_pte_range(struct mm_struct *dst_mm, struct mm_struct *src_mm, { pte_t *src_pte, *dst_pte; int progress = 0; - int rss[NO_RSS+1], anon; + int rss[2]; again: rss[1] = rss[0] = 0; @@ -467,8 +463,7 @@ again: progress++; continue; } - anon = copy_one_pte(dst_mm, src_mm, dst_pte, src_pte, vma,addr); - rss[anon]++; + copy_one_pte(dst_mm, src_mm, dst_pte, src_pte, vma, addr, rss); progress += 8; } while (dst_pte++, src_pte++, addr += PAGE_SIZE, addr != end); spin_unlock(&src_mm->page_table_lock);