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| author | Theodore Ts'o <tytso@mit.edu> | 2009-03-27 22:14:10 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-03-27 22:14:10 -0400 |
| commit | a64c8610bd3b753c6aff58f51c04cdf0ae478c18 (patch) | |
| tree | ca9ec4d9ca3d7195521a4004c6a599a35faafe5e /fs/buffer.c | |
| parent | 8e0ee43bc2c3e19db56a4adaa9a9b04ce885cd84 (diff) | |
| download | lwn-a64c8610bd3b753c6aff58f51c04cdf0ae478c18.tar.gz lwn-a64c8610bd3b753c6aff58f51c04cdf0ae478c18.zip | |
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>
Diffstat (limited to 'fs/buffer.c')
| -rw-r--r-- | fs/buffer.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/buffer.c b/fs/buffer.c index 891e1c78e4f1..e7ebd95e0c68 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -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; |