diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2016-07-26 15:26:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-26 16:19:19 -0700 |
| commit | fc127da085c26beb89f83ad804cf73422c3b6855 (patch) | |
| tree | 34d98b005382b45a463f7f17a1ba3d35094a0935 /mm/truncate.c | |
| parent | 83929372f629001568d43069a63376e13bfc497b (diff) | |
| download | lwn-fc127da085c26beb89f83ad804cf73422c3b6855.tar.gz lwn-fc127da085c26beb89f83ad804cf73422c3b6855.zip | |
truncate: handle file thp
For shmem/tmpfs we only need to tweak truncate_inode_page() and
invalidate_mapping_pages().
truncate_inode_pages_range() and invalidate_inode_pages2_range() are
adjusted to use page_to_pgoff().
Link: http://lkml.kernel.org/r/1466021202-61880-26-git-send-email-kirill.shutemov@linux.intel.com
Signed-off-by: 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/truncate.c')
| -rw-r--r-- | mm/truncate.c | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/mm/truncate.c b/mm/truncate.c index 4064f8f53daa..a01cce450a26 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -155,10 +155,14 @@ 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, - PAGE_SIZE, 0); + holelen, 0); } return truncate_complete_page(mapping, page); } @@ -279,7 +283,7 @@ void truncate_inode_pages_range(struct address_space *mapping, if (!trylock_page(page)) continue; - WARN_ON(page->index != index); + WARN_ON(page_to_pgoff(page) != index); if (PageWriteback(page)) { unlock_page(page); continue; @@ -367,7 +371,7 @@ void truncate_inode_pages_range(struct address_space *mapping, } lock_page(page); - WARN_ON(page->index != index); + WARN_ON(page_to_pgoff(page) != index); wait_on_page_writeback(page); truncate_inode_page(mapping, page); unlock_page(page); @@ -487,7 +491,21 @@ unsigned long invalidate_mapping_pages(struct address_space *mapping, if (!trylock_page(page)) continue; - WARN_ON(page->index != index); + + WARN_ON(page_to_pgoff(page) != index); + + /* Middle of THP: skip */ + if (PageTransTail(page)) { + unlock_page(page); + continue; + } else if (PageTransHuge(page)) { + index += HPAGE_PMD_NR - 1; + i += HPAGE_PMD_NR - 1; + /* 'end' is in the middle of THP */ + if (index == round_down(end, HPAGE_PMD_NR)) + continue; + } + ret = invalidate_inode_page(page); unlock_page(page); /* @@ -594,7 +612,7 @@ int invalidate_inode_pages2_range(struct address_space *mapping, } lock_page(page); - WARN_ON(page->index != index); + WARN_ON(page_to_pgoff(page) != index); if (page->mapping != mapping) { unlock_page(page); continue; |