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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2016-07-26 15:26:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-26 16:19:19 -0700
commitfc127da085c26beb89f83ad804cf73422c3b6855 (patch)
tree34d98b005382b45a463f7f17a1ba3d35094a0935 /mm/truncate.c
parent83929372f629001568d43069a63376e13bfc497b (diff)
downloadop-kernel-dev-fc127da085c26beb89f83ad804cf73422c3b6855.zip
op-kernel-dev-fc127da085c26beb89f83ad804cf73422c3b6855.tar.gz
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.c28
1 files changed, 23 insertions, 5 deletions
diff --git a/mm/truncate.c b/mm/truncate.c
index 4064f8f..a01cce4 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;
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