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authorJan Kara <jack@suse.cz>2017-11-15 17:37:15 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-15 18:21:06 -0800
commit9f4e41f4717832e34cca153ced62b4a1d7e26c0e (patch)
tree7ae9a21d93fd73e10be9a2a23ef9ac91cea2055d /mm
parent736304f3245f39392895ff3392e1325d3e49e7d2 (diff)
download96b-common-9f4e41f4717832e34cca153ced62b4a1d7e26c0e.tar.gz
mm: refactor truncate_complete_page()
Move call of delete_from_page_cache() and page->mapping check out of truncate_complete_page() into the single caller - truncate_inode_page(). Also move page_mapped() check into truncate_complete_page(). That way it will be easier to batch operations. Also rename truncate_complete_page() to truncate_cleanup_page(). Link: http://lkml.kernel.org/r/20171010151937.26984-3-jack@suse.cz Signed-off-by: Jan Kara <jack@suse.cz> Acked-by: Mel Gorman <mgorman@suse.de> Reviewed-by: Andi Kleen <ak@linux.intel.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/truncate.c30
1 files changed, 16 insertions, 14 deletions
diff --git a/mm/truncate.c b/mm/truncate.c
index 2330223841fb..383a530d511e 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -134,11 +134,17 @@ void do_invalidatepage(struct page *page, unsigned int offset,
* its lock, b) when a concurrent invalidate_mapping_pages got there first and
* c) when tmpfs swizzles a page between a tmpfs inode and swapper_space.
*/
-static int
-truncate_complete_page(struct address_space *mapping, struct page *page)
+static void
+truncate_cleanup_page(struct address_space *mapping, struct page *page)
{
- if (page->mapping != mapping)
- return -EIO;
+ if (page_mapped(page)) {
+ loff_t holelen;
+
+ holelen = PageTransHuge(page) ? HPAGE_PMD_SIZE : PAGE_SIZE;
+ unmap_mapping_range(mapping,
+ (loff_t)page->index << PAGE_SHIFT,
+ holelen, 0);
+ }
if (page_has_private(page))
do_invalidatepage(page, 0, PAGE_SIZE);
@@ -150,8 +156,6 @@ truncate_complete_page(struct address_space *mapping, struct page *page)
*/
cancel_dirty_page(page);
ClearPageMappedToDisk(page);
- delete_from_page_cache(page);
- return 0;
}
/*
@@ -180,16 +184,14 @@ invalidate_complete_page(struct address_space *mapping, struct page *page)
int truncate_inode_page(struct address_space *mapping, struct page *page)
{
- loff_t holelen;
VM_BUG_ON_PAGE(PageTail(page), page);
- holelen = PageTransHuge(page) ? HPAGE_PMD_SIZE : PAGE_SIZE;
- if (page_mapped(page)) {
- unmap_mapping_range(mapping,
- (loff_t)page->index << PAGE_SHIFT,
- holelen, 0);
- }
- return truncate_complete_page(mapping, page);
+ if (page->mapping != mapping)
+ return -EIO;
+
+ truncate_cleanup_page(mapping, page);
+ delete_from_page_cache(page);
+ return 0;
}
/*