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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-11-02 15:08:13 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-11-03 12:32:03 +0900
commitaeda7f6343e6375a832e52ff5ed389c115023ca5 (patch)
tree2543be730f7fff44e23fbe302108afa0093cc643 /fs/nilfs2
parentb1e19e5601277845b4f17ecd7c9ba04f73ee11aa (diff)
downloadop-kernel-dev-aeda7f6343e6375a832e52ff5ed389c115023ca5.zip
op-kernel-dev-aeda7f6343e6375a832e52ff5ed389c115023ca5.tar.gz
nilfs2: fix irregular checkpoint creation due to data flush
When nilfs flushes out dirty data to reduce memory pressure, creation of checkpoints is wrongly postponed. This bug causes irregular checkpoint creation especially in small footprint systems. To correct this issue, a timer for the checkpoint creation has to be continued if a log writer does not create a checkpoint. This will do the correction. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2')
-rw-r--r--fs/nilfs2/segment.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 683df89..6eff66a 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -2468,17 +2468,22 @@ static void nilfs_segctor_notify(struct nilfs_sc_info *sci,
/* Clear requests (even when the construction failed) */
spin_lock(&sci->sc_state_lock);
- sci->sc_state &= ~NILFS_SEGCTOR_COMMIT;
-
if (req->mode == SC_LSEG_SR) {
+ sci->sc_state &= ~NILFS_SEGCTOR_COMMIT;
sci->sc_seq_done = req->seq_accepted;
nilfs_segctor_wakeup(sci, req->sc_err ? : req->sb_err);
sci->sc_flush_request = 0;
- } else if (req->mode == SC_FLUSH_FILE)
- sci->sc_flush_request &= ~FLUSH_FILE_BIT;
- else if (req->mode == SC_FLUSH_DAT)
- sci->sc_flush_request &= ~FLUSH_DAT_BIT;
+ } else {
+ if (req->mode == SC_FLUSH_FILE)
+ sci->sc_flush_request &= ~FLUSH_FILE_BIT;
+ else if (req->mode == SC_FLUSH_DAT)
+ sci->sc_flush_request &= ~FLUSH_DAT_BIT;
+ /* re-enable timer if checkpoint creation was not done */
+ if (sci->sc_timer && (sci->sc_state & NILFS_SEGCTOR_COMMIT) &&
+ time_before(jiffies, sci->sc_timer->expires))
+ add_timer(sci->sc_timer);
+ }
spin_unlock(&sci->sc_state_lock);
}
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