block_write_full_page: Use synchronous writes for WBC_SYNC_ALL writebacks
When doing synchronous writes because wbc->sync_mode is set to WBC_SYNC_ALL, send the write request using WRITE_SYNC, so that we don't unduly block system calls such as fsync(). Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Acked-by: Jan Kara <jack@suse.cz>
This commit is contained in:
parent
8e0ee43bc2
commit
a64c8610bd
1 changed files with 3 additions and 2 deletions
|
@ -1714,6 +1714,7 @@ static int __block_write_full_page(struct inode *inode, struct page *page,
|
|||
struct buffer_head *bh, *head;
|
||||
const unsigned blocksize = 1 << inode->i_blkbits;
|
||||
int nr_underway = 0;
|
||||
int write_op = (wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : WRITE);
|
||||
|
||||
BUG_ON(!PageLocked(page));
|
||||
|
||||
|
@ -1805,7 +1806,7 @@ static int __block_write_full_page(struct inode *inode, struct page *page,
|
|||
do {
|
||||
struct buffer_head *next = bh->b_this_page;
|
||||
if (buffer_async_write(bh)) {
|
||||
submit_bh(WRITE, bh);
|
||||
submit_bh(write_op, bh);
|
||||
nr_underway++;
|
||||
}
|
||||
bh = next;
|
||||
|
@ -1859,7 +1860,7 @@ recover:
|
|||
struct buffer_head *next = bh->b_this_page;
|
||||
if (buffer_async_write(bh)) {
|
||||
clear_buffer_dirty(bh);
|
||||
submit_bh(WRITE, bh);
|
||||
submit_bh(write_op, bh);
|
||||
nr_underway++;
|
||||
}
|
||||
bh = next;
|
||||
|
|
Loading…
Reference in a new issue