From a98cdb85b990765dbe80a215367ae007320bfeea Mon Sep 17 00:00:00 2001 From: Stefan Behrens Date: Tue, 17 Jul 2012 09:02:11 -0600 Subject: [PATCH] Btrfs: suppress printk() if all device I/O stats are zero Code is added to suppress the I/O stats printing at mount time if all statistic values are zero. Signed-off-by: Stefan Behrens --- fs/btrfs/volumes.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 14436074350f..b8708f994e67 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -4884,6 +4884,14 @@ void btrfs_dev_stat_print_on_error(struct btrfs_device *dev) static void btrfs_dev_stat_print_on_load(struct btrfs_device *dev) { + int i; + + for (i = 0; i < BTRFS_DEV_STAT_VALUES_MAX; i++) + if (btrfs_dev_stat_read(dev, i) != 0) + break; + if (i == BTRFS_DEV_STAT_VALUES_MAX) + return; /* all values == 0, suppress message */ + printk_in_rcu(KERN_INFO "btrfs: bdev %s errs: wr %u, rd %u, flush %u, corrupt %u, gen %u\n", rcu_str_deref(dev->name), btrfs_dev_stat_read(dev, BTRFS_DEV_STAT_WRITE_ERRS),