From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
As with add_to_page_cache_locked() we handle HPAGE_CACHE_NR pages a
time.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
mm/filemap.c | 31 +++++++++++++++++++++++++------
1 file changed, 25 insertions(+), 6 deletions(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index b0c7c8c..657ce82 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -115,6 +115,9 @@
void __delete_from_page_cache(struct page *page)
{
struct address_space *mapping = page->mapping;
+ bool thp = PageTransHuge(page) &&
+ IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE_PAGECACHE);
+ int nr;
trace_mm_filemap_delete_from_page_cache(page);
/*
@@ -127,13 +130,29 @@ void __delete_from_page_cache(struct page *page)
else
cleancache_invalidate_page(mapping, page);
- radix_tree_delete(&mapping->page_tree, page->index);
+ if (thp) {
+ int i;
+
+ nr = HPAGE_CACHE_NR;
+ radix_tree_delete(&mapping->page_tree, page->index);
+ for (i = 1; i < HPAGE_CACHE_NR; i++) {
+ radix_tree_delete(&mapping->page_tree, page->index + i);
+ page[i].mapping = NULL;
+ page_cache_release(page + i);
+ }
+ __dec_zone_page_state(page, NR_FILE_TRANSPARENT_HUGEPAGES);
+ } else {
+ BUG_ON(PageTransHuge(page));
+ nr = 1;
+ radix_tree_delete(&mapping->page_tree, page->index);
+ }
+
page->mapping = NULL;
/* Leave page->index set: truncation lookup relies upon it */
- mapping->nrpages--;
- __dec_zone_page_state(page, NR_FILE_PAGES);
+ mapping->nrpages -= nr;
+ __mod_zone_page_state(page_zone(page), NR_FILE_PAGES, -nr);
if (PageSwapBacked(page))
- __dec_zone_page_state(page, NR_SHMEM);
+ __mod_zone_page_state(page_zone(page), NR_SHMEM, -nr);
BUG_ON(page_mapped(page));
/*
@@ -144,8 +163,8 @@ void __delete_from_page_cache(struct page *page)
* having removed the page entirely.
*/
if (PageDirty(page) && mapping_cap_account_dirty(mapping)) {
- dec_zone_page_state(page, NR_FILE_DIRTY);
- dec_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE);
+ mod_zone_page_state(page_zone(page), NR_FILE_DIRTY, -nr);
+ add_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE, -nr);
}
}
--
1.7.10.4
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