The patch titled
Subject: mm: move accounting updates before page_cache_tree_delete()
has been added to the -mm tree. Its filename is
mm-move-accounting-updates-before-page_cache_tree_delete.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-move-accounting-updates-before-page_cache_tree_delete.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-move-accounting-updates-before-page_cache_tree_delete.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Jan Kara <jack@xxxxxxx>
Subject: mm: move accounting updates before page_cache_tree_delete()
Move updates of various counters before page_cache_tree_delete() call. It
will be easier to batch things this way and there is no difference whether
the counters get updated before or after removal from the radix tree.
Link: http://lkml.kernel.org/r/20171010151937.26984-5-jack@xxxxxxx
Signed-off-by: Jan Kara <jack@xxxxxxx>
Acked-by: Mel Gorman <mgorman@xxxxxxx>
Reviewed-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/filemap.c | 49 +++++++++++++++++++++++++------------------------
1 file changed, 25 insertions(+), 24 deletions(-)
diff -puN mm/filemap.c~mm-move-accounting-updates-before-page_cache_tree_delete mm/filemap.c
--- a/mm/filemap.c~mm-move-accounting-updates-before-page_cache_tree_delete
+++ a/mm/filemap.c
@@ -224,34 +224,35 @@ void __delete_from_page_cache(struct pag
}
}
- page_cache_tree_delete(mapping, page, shadow);
-
- page->mapping = NULL;
- /* Leave page->index set: truncation lookup relies upon it */
-
/* hugetlb pages do not participate in page cache accounting. */
- if (PageHuge(page))
- return;
+ if (!PageHuge(page)) {
+ __mod_node_page_state(page_pgdat(page), NR_FILE_PAGES, -nr);
+ if (PageSwapBacked(page)) {
+ __mod_node_page_state(page_pgdat(page), NR_SHMEM, -nr);
+ if (PageTransHuge(page))
+ __dec_node_page_state(page, NR_SHMEM_THPS);
+ } else {
+ VM_BUG_ON_PAGE(PageTransHuge(page), page);
+ }
- __mod_node_page_state(page_pgdat(page), NR_FILE_PAGES, -nr);
- if (PageSwapBacked(page)) {
- __mod_node_page_state(page_pgdat(page), NR_SHMEM, -nr);
- if (PageTransHuge(page))
- __dec_node_page_state(page, NR_SHMEM_THPS);
- } else {
- VM_BUG_ON_PAGE(PageTransHuge(page), page);
+ /*
+ * At this point page must be either written or cleaned by
+ * truncate. Dirty page here signals a bug and loss of
+ * unwritten data.
+ *
+ * This fixes dirty accounting after removing the page entirely
+ * but leaves PageDirty set: it has no effect for truncated
+ * page and anyway will be cleared before returning page into
+ * buddy allocator.
+ */
+ if (WARN_ON_ONCE(PageDirty(page)))
+ account_page_cleaned(page, mapping,
+ inode_to_wb(mapping->host));
}
+ page_cache_tree_delete(mapping, page, shadow);
- /*
- * At this point page must be either written or cleaned by truncate.
- * Dirty page here signals a bug and loss of unwritten data.
- *
- * This fixes dirty accounting after removing the page entirely but
- * leaves PageDirty set: it has no effect for truncated page and
- * anyway will be cleared before returning page into buddy allocator.
- */
- if (WARN_ON_ONCE(PageDirty(page)))
- account_page_cleaned(page, mapping, inode_to_wb(mapping->host));
+ page->mapping = NULL;
+ /* Leave page->index set: truncation lookup relies upon it */
}
static void page_cache_free_page(struct address_space *mapping,
_
Patches currently in -mm which might be from jack@xxxxxxx are
mm-readahead-increase-maximum-readahead-window.patch
mm-implement-find_get_pages_range_tag.patch
btrfs-use-pagevec_lookup_range_tag.patch
ceph-use-pagevec_lookup_range_tag.patch
ext4-use-pagevec_lookup_range_tag.patch
f2fs-use-pagevec_lookup_range_tag.patch
f2fs-simplify-page-iteration-loops.patch
f2fs-use-find_get_pages_tag-for-looking-up-single-page.patch
gfs2-use-pagevec_lookup_range_tag.patch
nilfs2-use-pagevec_lookup_range_tag.patch
mm-use-pagevec_lookup_range_tag-in-__filemap_fdatawait_range.patch
mm-use-pagevec_lookup_range_tag-in-write_cache_pages.patch
mm-add-variant-of-pagevec_lookup_range_tag-taking-number-of-pages.patch
ceph-use-pagevec_lookup_range_nr_tag.patch
mm-remove-nr_pages-argument-from-pagevec_lookup_range_tag.patch
afs-use-find_get_pages_range_tag.patch
cifs-use-find_get_pages_range_tag.patch
mm-speedup-cancel_dirty_page-for-clean-pages.patch
mm-refactor-truncate_complete_page.patch
mm-factor-out-page-cache-page-freeing-into-a-separate-function.patch
mm-move-accounting-updates-before-page_cache_tree_delete.patch
mm-move-clearing-of-page-mapping-to-page_cache_tree_delete.patch
mm-factor-out-checks-and-accounting-from-__delete_from_page_cache.patch
mm-batch-radix-tree-operations-when-truncating-pages.patch
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