At now while switch page bits in data ranges
we always hande +1 page, for cover case
where end of data range is not page aligned
Let's handle that case more obvious and efficient
Check end aligment directly and touch +1 page
only then needed
Signed-off-by: Timofey Titovets <nefelim...@gmail.com>
---
fs/btrfs/extent_io.c | 12 ++++++++++--
fs/btrfs/inode.c | 6 +++++-
2 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 0538bf85adc3..131b7d1df9f7 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1359,7 +1359,11 @@ void extent_range_clear_dirty_for_io(struct inode
*inode, u64 start, u64 end)
unsigned long end_index = end >> PAGE_SHIFT;
struct page *page;
- while (index <= end_index) {
+ /* Don't miss unaligned end */
+ if (!IS_ALIGNED(end, PAGE_SIZE))
+ end_index++;
+
+ while (index < end_index) {
page = find_get_page(inode->i_mapping, index);
BUG_ON(!page); /* Pages should be in the extent_io_tree */
clear_page_dirty_for_io(page);
@@ -1374,7 +1378,11 @@ void extent_range_redirty_for_io(struct inode *inode,
u64 start, u64 end)
unsigned long end_index = end >> PAGE_SHIFT;
struct page *page;
- while (index <= end_index) {
+ /* Don't miss unaligned end */
+ if (!IS_ALIGNED(end, PAGE_SIZE))
+ end_index++;
+
+ while (index < end_index) {
page = find_get_page(inode->i_mapping, index);
BUG_ON(!page); /* Pages should be in the extent_io_tree */
__set_page_dirty_nobuffers(page);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index b6e81bd650ea..b4974d969f67 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -10799,7 +10799,11 @@ void btrfs_set_range_writeback(void *private_data, u64
start, u64 end)
unsigned long end_index = end >> PAGE_SHIFT;
struct page *page;
- while (index <= end_index) {
+ /* Don't miss unaligned end */
+ if (!IS_ALIGNED(end, PAGE_SIZE))
+ end_index++;
+
+ while (index < end_index) {
page = find_get_page(inode->i_mapping, index);
ASSERT(page); /* Pages should be in the extent_io_tree */
set_page_writeback(page);
--
2.14.2
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
