提交 a98cdb85 编写于 作者: S Stefan Behrens 提交者: Chris Mason

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: NStefan Behrens <sbehrens@giantdisaster.de>
上级 5021976d
......@@ -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),
......
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