Expose the per BDI stats in /sys/block//queue/* Signed-off-by: Peter Zijlstra --- block/ll_rw_blk.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) Index: linux-2.6-mm/block/ll_rw_blk.c =================================================================== --- linux-2.6-mm.orig/block/ll_rw_blk.c +++ linux-2.6-mm/block/ll_rw_blk.c @@ -3976,6 +3976,20 @@ static ssize_t queue_max_hw_sectors_show return queue_var_show(max_hw_sectors_kb, (page)); } +static ssize_t queue_nr_dirty_show(struct request_queue *q, char *page) +{ + return sprintf(page, "%lld\n", bdi_stat(&q->backing_dev_info, BDI_DIRTY)); +} + +static ssize_t queue_nr_writeback_show(struct request_queue *q, char *page) +{ + return sprintf(page, "%lld\n", bdi_stat(&q->backing_dev_info, BDI_WRITEBACK)); +} + +static ssize_t queue_nr_unstable_show(struct request_queue *q, char *page) +{ + return sprintf(page, "%lld\n", bdi_stat(&q->backing_dev_info, BDI_UNSTABLE)); +} static struct queue_sysfs_entry queue_requests_entry = { .attr = {.name = "nr_requests", .mode = S_IRUGO | S_IWUSR }, @@ -4006,6 +4020,21 @@ static struct queue_sysfs_entry queue_ma .show = queue_max_hw_sectors_show, }; +static struct queue_sysfs_entry queue_dirty_entry = { + .attr = {.name = "dirty_pages", .mode = S_IRUGO }, + .show = queue_nr_dirty_show, +}; + +static struct queue_sysfs_entry queue_writeback_entry = { + .attr = {.name = "writeback_pages", .mode = S_IRUGO }, + .show = queue_nr_writeback_show, +}; + +static struct queue_sysfs_entry queue_unstable_entry = { + .attr = {.name = "unstable_pages", .mode = S_IRUGO }, + .show = queue_nr_unstable_show, +}; + static struct queue_sysfs_entry queue_iosched_entry = { .attr = {.name = "scheduler", .mode = S_IRUGO | S_IWUSR }, .show = elv_iosched_show, @@ -4018,6 +4047,9 @@ static struct attribute *default_attrs[] &queue_initial_ra_entry.attr, &queue_max_hw_sectors_entry.attr, &queue_max_sectors_entry.attr, + &queue_dirty_entry.attr, + &queue_writeback_entry.attr, + &queue_unstable_entry.attr, &queue_iosched_entry.attr, NULL, }; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/