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Go Back   Linux Archive > Redhat > Cluster Development

 
 
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Old 11-25-2009, 01:30 PM
Steven Whitehouse
 
Default GFS2: remove division from new statfs code

From: Benjamin Marzinski <bmarzins@redhat.com>

It's not necessary to do any 64bit division for the statfs sync code, so
remove it.

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
---
fs/gfs2/super.c | 17 +++++++++--------
1 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 3fee2fd..b1dcfab 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -472,7 +472,8 @@ void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
struct buffer_head *l_bh;
- int percent, sync_percent;
+ s64 x, y;
+ int need_sync = 0;
int error;

error = gfs2_meta_inode_buffer(l_ip, &l_bh);
@@ -486,16 +487,16 @@ void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
l_sc->sc_free += free;
l_sc->sc_dinodes += dinodes;
gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode));
- if (m_sc->sc_free)
- percent = (100 * l_sc->sc_free) / m_sc->sc_free;
- else
- percent = 100;
+ if (sdp->sd_args.ar_statfs_percent) {
+ x = 100 * l_sc->sc_free;
+ y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent;
+ if (x >= y || x <= -y)
+ need_sync = 1;
+ }
spin_unlock(&sdp->sd_statfs_spin);

brelse(l_bh);
- sync_percent = sdp->sd_args.ar_statfs_percent;
- if (sync_percent && (percent >= sync_percent ||
- percent <= -sync_percent))
+ if (need_sync)
gfs2_wake_up_statfs(sdp);
}

--
1.6.2.5
 

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