From: Baolin Wang Date: Mon, 7 Sep 2020 08:10:15 +0000 (+0800) Subject: blk-throttle: Define readable macros instead of static variables X-Git-Tag: v5.10.7~1462^2~84 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e675df2adc2f0b8cbc0c64111d55b69f7253cbed;p=platform%2Fkernel%2Flinux-rpi.git 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 Signed-off-by: Jens Axboe --- diff --git a/block/blk-throttle.c b/block/blk-throttle.c index 06e73ed..ca9002d 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; }