[MIPS] rbhma4500: use generic txx9 gpio

[linux-2.6-omap-h63xx.git] / mm / rmap.c

diff --git a/mm/rmap.c b/mm/rmap.c
index 4a3487921effd04b4ab3c3cdbddf216259366d10..e9bb6b1093f6a8c5cea56c88ed0e00304a92317c 100644 (file)
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -302,7 +302,8 @@ out:
        return referenced;
 }
 
-static int page_referenced_anon(struct page *page)
+static int page_referenced_anon(struct page *page,
+                               struct mem_cgroup *mem_cont)
 {
        unsigned int mapcount;
        struct anon_vma *anon_vma;
@@ -315,6 +316,13 @@ static int page_referenced_anon(struct page *page)
 
        mapcount = page_mapcount(page);
        list_for_each_entry(vma, &anon_vma->head, anon_vma_node) {
+               /*
+                * If we are reclaiming on behalf of a cgroup, skip
+                * counting on behalf of references from different
+                * cgroups
+                */
+               if (mem_cont && !mm_match_cgroup(vma->vm_mm, mem_cont))
+                       continue;
                referenced += page_referenced_one(page, vma, &mapcount);
                if (!mapcount)
                        break;
@@ -327,6 +335,7 @@ static int page_referenced_anon(struct page *page)
 /**
  * page_referenced_file - referenced check for object-based rmap
  * @page: the page we're checking references on.
+ * @mem_cont: target memory controller
  *
  * For an object-based mapped page, find all the places it is mapped and
  * check/clear the referenced flag.  This is done by following the page->mapping
@@ -335,7 +344,8 @@ static int page_referenced_anon(struct page *page)
  *
  * This function is only called from page_referenced for object-based pages.
  */
-static int page_referenced_file(struct page *page)
+static int page_referenced_file(struct page *page,
+                               struct mem_cgroup *mem_cont)
 {
        unsigned int mapcount;
        struct address_space *mapping = page->mapping;
@@ -368,6 +378,13 @@ static int page_referenced_file(struct page *page)
        mapcount = page_mapcount(page);
 
        vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
+               /*
+                * If we are reclaiming on behalf of a cgroup, skip
+                * counting on behalf of references from different
+                * cgroups
+                */
+               if (mem_cont && !mm_match_cgroup(vma->vm_mm, mem_cont))
+                       continue;
                if ((vma->vm_flags & (VM_LOCKED|VM_MAYSHARE))
                                  == (VM_LOCKED|VM_MAYSHARE)) {
                        referenced++;
@@ -386,33 +403,37 @@ static int page_referenced_file(struct page *page)
  * page_referenced - test if the page was referenced
  * @page: the page to test
  * @is_locked: caller holds lock on the page
+ * @mem_cont: target memory controller
  *
  * Quick test_and_clear_referenced for all mappings to a page,
  * returns the number of ptes which referenced the page.
  */
-int page_referenced(struct page *page, int is_locked)
+int page_referenced(struct page *page, int is_locked,
+                       struct mem_cgroup *mem_cont)
 {
        int referenced = 0;
 
-       if (page_test_and_clear_young(page))
-               referenced++;
-
        if (TestClearPageReferenced(page))
                referenced++;
 
        if (page_mapped(page) && page->mapping) {
                if (PageAnon(page))
-                       referenced += page_referenced_anon(page);
+                       referenced += page_referenced_anon(page, mem_cont);
                else if (is_locked)
-                       referenced += page_referenced_file(page);
+                       referenced += page_referenced_file(page, mem_cont);
                else if (TestSetPageLocked(page))
                        referenced++;
                else {
                        if (page->mapping)
-                               referenced += page_referenced_file(page);
+                               referenced +=
+                                       page_referenced_file(page, mem_cont);
                        unlock_page(page);
                }
        }
+
+       if (page_test_and_clear_young(page))
+               referenced++;
+
        return referenced;
 }
 
@@ -488,7 +509,7 @@ int page_mkclean(struct page *page)
 EXPORT_SYMBOL_GPL(page_mkclean);
 
 /**
- * page_set_anon_rmap - setup new anonymous rmap
+ * __page_set_anon_rmap - setup new anonymous rmap
  * @page:      the page to add the mapping to
  * @vma:       the vm area in which the mapping is added
  * @address:   the user virtual address mapped
@@ -512,7 +533,7 @@ static void __page_set_anon_rmap(struct page *page,
 }
 
 /**
- * page_set_anon_rmap - sanity check anonymous rmap addition
+ * __page_check_anon_rmap - sanity check anonymous rmap addition
  * @page:      the page to add the mapping to
  * @vma:       the vm area in which the mapping is added
  * @address:   the user virtual address mapped
@@ -565,7 +586,7 @@ void page_add_anon_rmap(struct page *page,
        }
 }
 
-/*
+/**
  * page_add_new_anon_rmap - add pte mapping to a new anonymous page
  * @page:      the page to add the mapping to
  * @vma:       the vm area in which the mapping is added
@@ -605,6 +626,8 @@ void page_add_file_rmap(struct page *page)
 /**
  * page_dup_rmap - duplicate pte mapping to a page
  * @page:      the page to add the mapping to
+ * @vma:       the vm area being duplicated
+ * @address:   the user virtual address mapped
  *
  * For copy_page_range only: minimal extract from page_add_file_rmap /
  * page_add_anon_rmap, avoiding unnecessary tests (already checked) so it's
@@ -624,6 +647,7 @@ void page_dup_rmap(struct page *page, struct vm_area_struct *vma, unsigned long
 /**
  * page_remove_rmap - take down pte mapping from a page
  * @page: page to remove mapping from
+ * @vma: the vm area in which the mapping is removed
  *
  * The caller needs to hold the pte lock.
  */
@@ -872,6 +896,7 @@ static int try_to_unmap_anon(struct page *page, int migration)
 /**
  * try_to_unmap_file - unmap file page using the object-based rmap method
  * @page: the page to unmap
+ * @migration: migration flag
  *
  * Find all the mappings of a page using the mapping pointer and the vma chains
  * contained in the address_space struct it points to.
@@ -968,6 +993,7 @@ out:
 /**
  * try_to_unmap - try to remove all page table mappings to a page
  * @page: the page to get unmapped
+ * @migration: migration flag
  *
  * Tries to remove all the page table entries which are mapping this
  * page, used in the pageout path.  Caller must hold the page lock.