Hey Zhi,
On Wed, Jul 31, 2013 at 12:07:32PM +0800, Zhi Yong Wu wrote:
> On Wed, Jul 31, 2013 at 7:11 AM, Dave Chinner <david@xxxxxxxxxxxxx> wrote:
> > On Tue, Jul 30, 2013 at 05:59:07PM +0800, zwu.kernel@xxxxxxxxx wrote:
> >> From: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx>
> >>
> >> It can take a long time to run log recovery operation because it is
> >> single threaded and is bound by read latency. We can find that it took
> >> most of the time to wait for the read IO to occur, so if one object
> >> readahead is introduced to log recovery, it will obviously reduce the
> >> log recovery time.
> >>
> >> Log recovery time stat:
> >>
> >> w/o this patch w/ this patch
> >>
> >> real: 0m15.023s 0m7.802s
> >> user: 0m0.001s 0m0.001s
> >> sys: 0m0.246s 0m0.107s
> >>
> >> Signed-off-by: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx>
> >> ---
> >> fs/xfs/xfs_log_recover.c | 162 +++++++++++++++++++++++++++++++++++++++++++++--
> >> fs/xfs/xfs_log_recover.h | 2 +
> >> 2 files changed, 159 insertions(+), 5 deletions(-)
> >>
> >> diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
> >> index 7681b19..029826f 100644
> >> --- a/fs/xfs/xfs_log_recover.c
> >> +++ b/fs/xfs/xfs_log_recover.c
> >> @@ -3116,6 +3116,111 @@ xlog_recover_free_trans(
> >> kmem_free(trans);
> >> }
> >>
> >> +STATIC void
> >> +xlog_recover_buffer_ra_pass2(
> >> + struct xlog *log,
> >> + struct xlog_recover_item *item)
> >> +{
> >> + xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr;
> >> + xfs_mount_t *mp = log->l_mp;
> >
> > struct xfs_buf_log_format
> > struct xfs_mount
> Why? *_t is also used in a lot of other places.
It is just a general style preference for using the struct instead of the _t in
the xfs codebase. Over the course of the past few years they've slowly been
converted in this direction, and we prefer not to add any more _t if it can be
avoided.
-Ben
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