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authorBaolin Wang <baolin.wang@linux.alibaba.com>2020-09-07 10:10:15 +0200
committerJens Axboe <axboe@kernel.dk>2020-09-15 03:36:54 +0200
commite675df2adc2f0b8cbc0c64111d55b69f7253cbed (patch)
treee10a57b5c114f92c90ff32e0ab67a3bae3accd15 /block
parentblk-throttle: Use readable READ/WRITE macros (diff)
downloadlinux-e675df2adc2f0b8cbc0c64111d55b69f7253cbed.tar.xz
linux-e675df2adc2f0b8cbc0c64111d55b69f7253cbed.zip
blk-throttle: Define readable macros instead of static variables
The 'throtl_grp_quantum' and 'throtl_quantum' are both read-only variables, thus better to use readable macros instead of static variables, which can also save some spaces for .bss area. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-throttle.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 06e73ed3e774..ca9002d9d2c7 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -15,10 +15,10 @@
#include "blk-cgroup-rwstat.h"
/* Max dispatch from a group in 1 round */
-static int throtl_grp_quantum = 8;
+#define THROTL_GRP_QUANTUM 8
/* Total max dispatch from all groups in one round */
-static int throtl_quantum = 32;
+#define THROTL_QUANTUM 32
/* Throttling is performed over a slice and after that slice is renewed */
#define DFL_THROTL_SLICE_HD (HZ / 10)
@@ -1175,8 +1175,8 @@ static int throtl_dispatch_tg(struct throtl_grp *tg)
{
struct throtl_service_queue *sq = &tg->service_queue;
unsigned int nr_reads = 0, nr_writes = 0;
- unsigned int max_nr_reads = throtl_grp_quantum*3/4;
- unsigned int max_nr_writes = throtl_grp_quantum - max_nr_reads;
+ unsigned int max_nr_reads = THROTL_GRP_QUANTUM * 3 / 4;
+ unsigned int max_nr_writes = THROTL_GRP_QUANTUM - max_nr_reads;
struct bio *bio;
/* Try to dispatch 75% READS and 25% WRITES */
@@ -1226,7 +1226,7 @@ static int throtl_select_dispatch(struct throtl_service_queue *parent_sq)
if (sq->nr_queued[0] || sq->nr_queued[1])
tg_update_disptime(tg);
- if (nr_disp >= throtl_quantum)
+ if (nr_disp >= THROTL_QUANTUM)
break;
}