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| author | Jan Kara <jack@suse.cz> | 2021-11-25 14:36:39 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-11-29 06:38:52 -0700 |
| commit | 582f04e19ad7b41df993c669805e48a01bcd9c5b (patch) | |
| tree | 95130861ddbb3a05bd1e4037d9a910d54df3ce17 /block/bfq-iosched.h | |
| parent | 1f18b7005b49b96782cd984babd59c286973b526 (diff) | |
| download | linux-582f04e19ad7b41df993c669805e48a01bcd9c5b.tar.gz linux-582f04e19ad7b41df993c669805e48a01bcd9c5b.tar.bz2 linux-582f04e19ad7b41df993c669805e48a01bcd9c5b.zip | |
bfq: Provide helper to generate bfqq name
Instead of having helper formating bfqq pid, provide a helper to
generate full bfqq name as used in the traces. It saves some code
duplication and will save more in the coming tracepoints.
Acked-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20211125133645.27483-6-jack@suse.cz
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bfq-iosched.h')
| -rw-r--r-- | block/bfq-iosched.h | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h index bb8180c52a31..07288b9da389 100644 --- a/block/bfq-iosched.h +++ b/block/bfq-iosched.h @@ -25,7 +25,7 @@ #define BFQ_DEFAULT_GRP_IOPRIO 0 #define BFQ_DEFAULT_GRP_CLASS IOPRIO_CLASS_BE -#define MAX_PID_STR_LENGTH 12 +#define MAX_BFQQ_NAME_LENGTH 16 /* * Soft real-time applications are extremely more latency sensitive @@ -1083,26 +1083,27 @@ void bfq_add_bfqq_busy(struct bfq_data *bfqd, struct bfq_queue *bfqq); /* --------------- end of interface of B-WF2Q+ ---------------- */ /* Logging facilities. */ -static inline void bfq_pid_to_str(int pid, char *str, int len) +static inline void bfq_bfqq_name(struct bfq_queue *bfqq, char *str, int len) { - if (pid != -1) - snprintf(str, len, "%d", pid); + char type = bfq_bfqq_sync(bfqq) ? 'S' : 'A'; + + if (bfqq->pid != -1) + snprintf(str, len, "bfq%d%c", bfqq->pid, type); else - snprintf(str, len, "SHARED-"); + snprintf(str, len, "bfqSHARED-%c", type); } #ifdef CONFIG_BFQ_GROUP_IOSCHED struct bfq_group *bfqq_group(struct bfq_queue *bfqq); #define bfq_log_bfqq(bfqd, bfqq, fmt, args...) do { \ - char pid_str[MAX_PID_STR_LENGTH]; \ + char pid_str[MAX_BFQQ_NAME_LENGTH]; \ if (likely(!blk_trace_note_message_enabled((bfqd)->queue))) \ break; \ - bfq_pid_to_str((bfqq)->pid, pid_str, MAX_PID_STR_LENGTH); \ + bfq_bfqq_name((bfqq), pid_str, MAX_BFQQ_NAME_LENGTH); \ blk_add_cgroup_trace_msg((bfqd)->queue, \ bfqg_to_blkg(bfqq_group(bfqq))->blkcg, \ - "bfq%s%c " fmt, pid_str, \ - bfq_bfqq_sync((bfqq)) ? 'S' : 'A', ##args); \ + "%s " fmt, pid_str, ##args); \ } while (0) #define bfq_log_bfqg(bfqd, bfqg, fmt, args...) do { \ @@ -1113,13 +1114,11 @@ struct bfq_group *bfqq_group(struct bfq_queue *bfqq); #else /* CONFIG_BFQ_GROUP_IOSCHED */ #define bfq_log_bfqq(bfqd, bfqq, fmt, args...) do { \ - char pid_str[MAX_PID_STR_LENGTH]; \ + char pid_str[MAX_BFQQ_NAME_LENGTH]; \ if (likely(!blk_trace_note_message_enabled((bfqd)->queue))) \ break; \ - bfq_pid_to_str((bfqq)->pid, pid_str, MAX_PID_STR_LENGTH); \ - blk_add_trace_msg((bfqd)->queue, "bfq%s%c " fmt, pid_str, \ - bfq_bfqq_sync((bfqq)) ? 'S' : 'A', \ - ##args); \ + bfq_bfqq_name((bfqq), pid_str, MAX_BFQQ_NAME_LENGTH); \ + blk_add_trace_msg((bfqd)->queue, "%s " fmt, pid_str, ##args); \ } while (0) #define bfq_log_bfqg(bfqd, bfqg, fmt, args...) do {} while (0) |