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bcache: display rate debug parameters to 0 when writeback is not running 

When writeback is not running, writeback rate should be 0, other value is
misleading. And the following dyanmic writeback rate debug parameters
should be 0 too,
	rate, proportional, integral, change
otherwise they are misleading when writeback is not running.

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Coly Li 2018-08-09 15:48:43 +08:00 committed by Jens Axboe
parent 78ac210717
commit b4cb6efc1a
1 changed files with 16 additions and 10 deletions
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26
drivers/md/bcache/sysfs.c
View File

@ -149,6 +149,7 @@ SHOW(__bch_cached_dev)
struct cached_dev *dc = container_of(kobj, struct cached_dev,
disk.kobj);
const char *states[] = { "no cache", "clean", "dirty", "inconsistent" };
int wb = dc->writeback_running;
#define var(stat) (dc->stat)
@ -170,7 +171,7 @@ SHOW(__bch_cached_dev)
var_printf(writeback_running, "%i");
var_print(writeback_delay);
var_print(writeback_percent);
sysfs_hprint(writeback_rate, dc->writeback_rate.rate << 9);
sysfs_hprint(writeback_rate, wb ? dc->writeback_rate.rate << 9 : 0);
sysfs_hprint(io_errors, atomic_read(&dc->io_errors));
sysfs_printf(io_error_limit, "%i", dc->error_limit);
sysfs_printf(io_disable, "%i", dc->io_disable);
@ -188,15 +189,20 @@ SHOW(__bch_cached_dev)
char change[20];
s64 next_io;
bch_hprint(rate, dc->writeback_rate.rate << 9);
bch_hprint(dirty, bcache_dev_sectors_dirty(&dc->disk) << 9);
bch_hprint(target, dc->writeback_rate_target << 9);
bch_hprint(proportional,dc->writeback_rate_proportional << 9);
bch_hprint(integral, dc->writeback_rate_integral_scaled << 9);
bch_hprint(change, dc->writeback_rate_change << 9);
next_io = div64_s64(dc->writeback_rate.next - local_clock(),
NSEC_PER_MSEC);
/*
* Except for dirty and target, other values should
* be 0 if writeback is not running.
*/
bch_hprint(rate, wb ? dc->writeback_rate.rate << 9 : 0);
bch_hprint(dirty, bcache_dev_sectors_dirty(&dc->disk) << 9);
bch_hprint(target, dc->writeback_rate_target << 9);
bch_hprint(proportional,
wb ? dc->writeback_rate_proportional << 9 : 0);
bch_hprint(integral,
wb ? dc->writeback_rate_integral_scaled << 9 : 0);
bch_hprint(change, wb ? dc->writeback_rate_change << 9 : 0);
next_io = wb ? div64_s64(dc->writeback_rate.next-local_clock(),
NSEC_PER_MSEC) : 0;
return sprintf(buf,
"rate:\t\t%s/sec\n"