diff options
Diffstat (limited to 'fs/gfs2/log.c')
| -rw-r--r-- | fs/gfs2/log.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c index 0cace3da9dbb..6456fc39aace 100644 --- a/fs/gfs2/log.c +++ b/fs/gfs2/log.c @@ -261,6 +261,12 @@ static void ail2_empty(struct gfs2_sbd *sdp, unsigned int new_tail) * @sdp: The GFS2 superblock * @blks: The number of blocks to reserve * + * Note that we never give out the last 6 blocks of the journal. Thats + * due to the fact that there is are a small number of header blocks + * associated with each log flush. The exact number can't be known until + * flush time, so we ensure that we have just enough free blocks at all + * times to avoid running out during a log flush. + * * Returns: errno */ @@ -274,7 +280,7 @@ int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks) mutex_lock(&sdp->sd_log_reserve_mutex); gfs2_log_lock(sdp); - while(sdp->sd_log_blks_free <= blks) { + while(sdp->sd_log_blks_free <= (blks + 6)) { gfs2_log_unlock(sdp); gfs2_ail1_empty(sdp, 0); gfs2_log_flush(sdp, NULL); @@ -643,12 +649,9 @@ void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) up_read(&sdp->sd_log_flush_lock); gfs2_log_lock(sdp); - if (sdp->sd_log_num_buf > gfs2_tune_get(sdp, gt_incore_log_blocks)) { - gfs2_log_unlock(sdp); - gfs2_log_flush(sdp, NULL); - } else { - gfs2_log_unlock(sdp); - } + if (sdp->sd_log_num_buf > gfs2_tune_get(sdp, gt_incore_log_blocks)) + wake_up_process(sdp->sd_logd_process); + gfs2_log_unlock(sdp); } /** |