Messages in this thread Patch in this message | | | From | Theodore Ts'o <> | Subject | [PATCH 1/3] block_write_full_page: Use synchronous writes for WBC_SYNC_ALL writebacks | Date | Fri, 27 Mar 2009 16:24:29 -0400 |
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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> --- fs/buffer.c | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/buffer.c b/fs/buffer.c index 891e1c7..e7ebd95 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; -- 1.5.6.3
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