ll_rw_block in ext4_discard_partial_page_buffers_no_lock is replaced with
ext4_submit_bh_read, and ext4_ios_read are called in ext4_readpage and
ext4_readpages in order to account the data request.
CC: Jens Axboe <axboe@xxxxxxxxx>
CC: Steven Whitehouse <swhiteho@xxxxxxxxxx>
CC: Aditya Kali <adityakali@xxxxxxxxxx>
Signed-off-by: Wang Shaoyan <wangshaoyan.pt@xxxxxxxxxx>
Signed-off-by: Zheng Liu <wenqing.lz@xxxxxxxxxx>
---
fs/ext4/inode.c | 14 +++++++++-----
1 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index b68d129..ff56658 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2665,6 +2665,8 @@ static sector_t ext4_bmap(struct address_space *mapping, sector_t block)
static int ext4_readpage(struct file *file, struct page *page)
{
trace_ext4_readpage(page);
+ ext4_ios_read(page->mapping->host->i_sb, EXT4_IOS_REGULAR_DATA,
+ ext4_blocks_per_page(page->mapping->host));
return mpage_readpage(page, ext4_get_block);
}
@@ -2672,6 +2674,8 @@ static int
ext4_readpages(struct file *file, struct address_space *mapping,
struct list_head *pages, unsigned nr_pages)
{
+ ext4_ios_read(mapping->host->i_sb, EXT4_IOS_REGULAR_DATA,
+ ext4_blocks_per_page(mapping->host));
return mpage_readpages(mapping, pages, nr_pages, ext4_get_block);
}
@@ -3268,12 +3272,12 @@ static int ext4_discard_partial_page_buffers_no_lock(handle_t *handle,
if (PageUptodate(page))
set_buffer_uptodate(bh);
- if (!buffer_uptodate(bh)) {
- err = -EIO;
- ll_rw_block(READ, 1, &bh);
- wait_on_buffer(bh);
+ if (!bh_uptodate_or_lock(bh)) {
+ err = ext4_submit_bh_read(READ, bh, inode->i_sb,
+ EXT4_IOS_REGULAR_DATA,
+ ext4_blocks_per_page(inode));
/* Uhhuh. Read error. Complain and punt.*/
- if (!buffer_uptodate(bh))
+ if (err)
goto next;
}
--
1.7.4.1
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