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authorJoonsoo Kim <iamjoonsoo.kim@lge.com>2014-01-22 03:49:52 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-22 04:19:45 +0400
commite8351ac9bfa7f4412d5d196b6742309473ca506d (patch)
treea7110ca9274ac25e72f3fac02cc7ba5e934e995b /mm/ksm.c
parent52629506420ce32997f1fba0a1ab2f1aaa9a4f79 (diff)
downloadlinux-e8351ac9bfa7f4412d5d196b6742309473ca506d.tar.xz
mm/rmap: use rmap_walk() in try_to_munlock()
Now, we have an infrastructure in rmap_walk() to handle difference from variants of rmap traversing functions. So, just use it in try_to_munlock(). In this patch, I change following things. 1. remove some variants of rmap traversing functions. cf> try_to_unmap_ksm, try_to_unmap_anon, try_to_unmap_file 2. mechanical change to use rmap_walk() in try_to_munlock(). 3. copy and paste comments. Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Hugh Dickins <hughd@google.com> Cc: Rik van Riel <riel@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Hillf Danton <dhillf@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/ksm.c')
-rw-r--r--mm/ksm.c50
1 files changed, 0 insertions, 50 deletions
diff --git a/mm/ksm.c b/mm/ksm.c
index 6b4baa97f4c0..646d45a6b6c8 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1946,56 +1946,6 @@ out:
return referenced;
}
-int try_to_unmap_ksm(struct page *page, enum ttu_flags flags)
-{
- struct stable_node *stable_node;
- struct rmap_item *rmap_item;
- int ret = SWAP_AGAIN;
- int search_new_forks = 0;
-
- VM_BUG_ON(!PageKsm(page));
- VM_BUG_ON(!PageLocked(page));
-
- stable_node = page_stable_node(page);
- if (!stable_node)
- return SWAP_FAIL;
-again:
- hlist_for_each_entry(rmap_item, &stable_node->hlist, hlist) {
- struct anon_vma *anon_vma = rmap_item->anon_vma;
- struct anon_vma_chain *vmac;
- struct vm_area_struct *vma;
-
- anon_vma_lock_read(anon_vma);
- anon_vma_interval_tree_foreach(vmac, &anon_vma->rb_root,
- 0, ULONG_MAX) {
- vma = vmac->vma;
- if (rmap_item->address < vma->vm_start ||
- rmap_item->address >= vma->vm_end)
- continue;
- /*
- * Initially we examine only the vma which covers this
- * rmap_item; but later, if there is still work to do,
- * we examine covering vmas in other mms: in case they
- * were forked from the original since ksmd passed.
- */
- if ((rmap_item->mm == vma->vm_mm) == search_new_forks)
- continue;
-
- ret = try_to_unmap_one(page, vma,
- rmap_item->address, (void *)flags);
- if (ret != SWAP_AGAIN || !page_mapped(page)) {
- anon_vma_unlock_read(anon_vma);
- goto out;
- }
- }
- anon_vma_unlock_read(anon_vma);
- }
- if (!search_new_forks++)
- goto again;
-out:
- return ret;
-}
-
int rmap_walk_ksm(struct page *page, struct rmap_walk_control *rwc)
{
struct stable_node *stable_node;