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From: Jens Axboe on 15 Apr 2010 06:40
On Wed, Apr 14 2010, Jeff Moyer wrote:
> This patch gets CFQ back in line with deadline for iozone runs, especially
> those testing small files + fsync timings.
>
> Signed-off-by: Jeff Moyer <jmoyer(a)redhat.com>
> ---
> fs/jbd2/journal.c | 6 ++++++
> 1 files changed, 6 insertions(+), 0 deletions(-)
>
> diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
> index c03d4dc..ce46df6 100644
> --- a/fs/jbd2/journal.c
> +++ b/fs/jbd2/journal.c
> @@ -41,6 +41,7 @@
> #include <linux/hash.h>
> #include <linux/log2.h>
> #include <linux/vmalloc.h>
> +#include <linux/blkdev.h>
>
> #define CREATE_TRACE_POINTS
> #include <trace/events/jbd2.h>
> @@ -580,6 +581,11 @@ int jbd2_log_wait_commit(journal_t *journal, tid_t tid)
> while (tid_gt(tid, journal->j_commit_sequence)) {
> jbd_debug(1, "JBD: want %d, j_commit_sequence=%d\n",
> tid, journal->j_commit_sequence);
> + /*
> + * Give up our I/O scheduler time slice to allow the journal
> + * thread to issue I/O.
> + */
> + blk_yield(journal->j_dev->bd_disk->queue);
> wake_up(&journal->j_wait_commit);
> spin_unlock(&journal->j_state_lock);
> wait_event(journal->j_wait_done_commit,

White space problem here.

--
Jens Axboe

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