try_to_unmap: Rename ignore_refs to migrate
migrate is a better name since we implement special handling for
page migration later.
Signed-off-by: Christoph Lameter <[email protected]>
Index: linux-2.6.17-rc1-mm2/mm/rmap.c
===================================================================
--- linux-2.6.17-rc1-mm2.orig/mm/rmap.c 2006-04-02 20:22:10.000000000 -0700
+++ linux-2.6.17-rc1-mm2/mm/rmap.c 2006-04-13 12:56:10.000000000 -0700
@@ -578,7 +578,7 @@ void page_remove_rmap(struct page *page)
* repeatedly from either try_to_unmap_anon or try_to_unmap_file.
*/
static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
- int ignore_refs)
+ int migration)
{
struct mm_struct *mm = vma->vm_mm;
unsigned long address;
@@ -602,7 +602,7 @@ static int try_to_unmap_one(struct page
*/
if ((vma->vm_flags & VM_LOCKED) ||
(ptep_clear_flush_young(vma, address, pte)
- && !ignore_refs)) {
+ && !migration)) {
ret = SWAP_FAIL;
goto out_unmap;
}
@@ -736,7 +736,7 @@ static void try_to_unmap_cluster(unsigne
pte_unmap_unlock(pte - 1, ptl);
}
-static int try_to_unmap_anon(struct page *page, int ignore_refs)
+static int try_to_unmap_anon(struct page *page, int migration)
{
struct anon_vma *anon_vma;
struct vm_area_struct *vma;
@@ -747,7 +747,7 @@ static int try_to_unmap_anon(struct page
return ret;
list_for_each_entry(vma, &anon_vma->head, anon_vma_node) {
- ret = try_to_unmap_one(page, vma, ignore_refs);
+ ret = try_to_unmap_one(page, vma, migration);
if (ret == SWAP_FAIL || !page_mapped(page))
break;
}
@@ -764,7 +764,7 @@ static int try_to_unmap_anon(struct page
*
* This function is only called from try_to_unmap for object-based pages.
*/
-static int try_to_unmap_file(struct page *page, int ignore_refs)
+static int try_to_unmap_file(struct page *page, int migration)
{
struct address_space *mapping = page->mapping;
pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT);
@@ -778,7 +778,7 @@ static int try_to_unmap_file(struct page
spin_lock(&mapping->i_mmap_lock);
vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
- ret = try_to_unmap_one(page, vma, ignore_refs);
+ ret = try_to_unmap_one(page, vma, migration);
if (ret == SWAP_FAIL || !page_mapped(page))
goto out;
}
@@ -863,16 +863,16 @@ out:
* SWAP_AGAIN - we missed a mapping, try again later
* SWAP_FAIL - the page is unswappable
*/
-int try_to_unmap(struct page *page, int ignore_refs)
+int try_to_unmap(struct page *page, int migration)
{
int ret;
BUG_ON(!PageLocked(page));
if (PageAnon(page))
- ret = try_to_unmap_anon(page, ignore_refs);
+ ret = try_to_unmap_anon(page, migration);
else
- ret = try_to_unmap_file(page, ignore_refs);
+ ret = try_to_unmap_file(page, migration);
if (!page_mapped(page))
ret = SWAP_SUCCESS;
-
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