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authorLinus Torvalds <torvalds@linux-foundation.org>2008-07-02 19:25:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-02 19:25:36 -0700
commit0e77a07ff9d18cdfc6c1fdd5b3c667ae79895489 (patch)
tree0b8b5a24f3c7081244b0a64625f6184733de43cf
parent23c0e4a2257051113a99e1377c49af224bd27bc8 (diff)
parent18ce3751ccd488c78d3827e9f6bf54e6322676fb (diff)
downloadop-kernel-dev-0e77a07ff9d18cdfc6c1fdd5b3c667ae79895489.zip
op-kernel-dev-0e77a07ff9d18cdfc6c1fdd5b3c667ae79895489.tar.gz
Merge branch 'for-2.6.26' of git://git.kernel.dk/linux-2.6-block
* 'for-2.6.26' of git://git.kernel.dk/linux-2.6-block: Properly notify block layer of sync writes block: Fix the starving writes bug in the anticipatory IO scheduler
-rw-r--r--block/as-iosched.c2
-rw-r--r--fs/buffer.c13
-rw-r--r--include/linux/fs.h1
3 files changed, 11 insertions, 5 deletions
diff --git a/block/as-iosched.c b/block/as-iosched.c
index 8c39467..743f33a 100644
--- a/block/as-iosched.c
+++ b/block/as-iosched.c
@@ -831,6 +831,8 @@ static void as_completed_request(struct request_queue *q, struct request *rq)
}
if (ad->changed_batch && ad->nr_dispatched == 1) {
+ ad->current_batch_expires = jiffies +
+ ad->batch_expire[ad->batch_data_dir];
kblockd_schedule_work(&ad->antic_work);
ad->changed_batch = 0;
diff --git a/fs/buffer.c b/fs/buffer.c
index a073f3f..0f51c0f 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -821,7 +821,7 @@ static int fsync_buffers_list(spinlock_t *lock, struct list_head *list)
* contents - it is a noop if I/O is still in
* flight on potentially older contents.
*/
- ll_rw_block(SWRITE, 1, &bh);
+ ll_rw_block(SWRITE_SYNC, 1, &bh);
brelse(bh);
spin_lock(lock);
}
@@ -2940,16 +2940,19 @@ void ll_rw_block(int rw, int nr, struct buffer_head *bhs[])
for (i = 0; i < nr; i++) {
struct buffer_head *bh = bhs[i];
- if (rw == SWRITE)
+ if (rw == SWRITE || rw == SWRITE_SYNC)
lock_buffer(bh);
else if (test_set_buffer_locked(bh))
continue;
- if (rw == WRITE || rw == SWRITE) {
+ if (rw == WRITE || rw == SWRITE || rw == SWRITE_SYNC) {
if (test_clear_buffer_dirty(bh)) {
bh->b_end_io = end_buffer_write_sync;
get_bh(bh);
- submit_bh(WRITE, bh);
+ if (rw == SWRITE_SYNC)
+ submit_bh(WRITE_SYNC, bh);
+ else
+ submit_bh(WRITE, bh);
continue;
}
} else {
@@ -2978,7 +2981,7 @@ int sync_dirty_buffer(struct buffer_head *bh)
if (test_clear_buffer_dirty(bh)) {
get_bh(bh);
bh->b_end_io = end_buffer_write_sync;
- ret = submit_bh(WRITE, bh);
+ ret = submit_bh(WRITE_SYNC, bh);
wait_on_buffer(bh);
if (buffer_eopnotsupp(bh)) {
clear_buffer_eopnotsupp(bh);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 7c10808..d8e2762 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -83,6 +83,7 @@ extern int dir_notify_enable;
#define READ_SYNC (READ | (1 << BIO_RW_SYNC))
#define READ_META (READ | (1 << BIO_RW_META))
#define WRITE_SYNC (WRITE | (1 << BIO_RW_SYNC))
+#define SWRITE_SYNC (SWRITE | (1 << BIO_RW_SYNC))
#define WRITE_BARRIER ((1 << BIO_RW) | (1 << BIO_RW_BARRIER))
#define SEL_IN 1
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