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authorVivek Goyal <vgoyal@redhat.com>2012-10-03 16:57:01 -0400
committerTejun Heo <tj@kernel.org>2013-01-09 08:05:09 -0800
commitb226e5c411759eec29308f0ea38e918aa695dc7f (patch)
tree6f2499ce07c59f7a180de4b21bd5fc8e8f4c09bd /block
parent1f23f12151ab508728dd5fca12180e2fce6c6949 (diff)
downloadlinaro-lsk-b226e5c411759eec29308f0ea38e918aa695dc7f.tar.gz
cfq-iosched: Print sync-noidle information in blktrace messages
Currently we attach a character "S" or "A" to the cfqq<pid>, to represent whether queues is sync or async. Add one more character "N" to represent whether it is sync-noidle queue or sync queue. So now three different type of queues will look as follows. cfq1234S --> sync queus cfq1234SN --> sync noidle queue cfq1234A --> Async queue Previously S/A classification was being printed only if group scheduling was enabled. This patch also makes sure that this classification is displayed even if group idling is disabled. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Acked-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'block')
-rw-r--r--block/cfq-iosched.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 5ad4cae1beb..bc076f45ca4 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -586,8 +586,9 @@ static inline void cfqg_put(struct cfq_group *cfqg)
char __pbuf[128]; \
\
blkg_path(cfqg_to_blkg((cfqq)->cfqg), __pbuf, sizeof(__pbuf)); \
- blk_add_trace_msg((cfqd)->queue, "cfq%d%c %s " fmt, (cfqq)->pid, \
- cfq_cfqq_sync((cfqq)) ? 'S' : 'A', \
+ blk_add_trace_msg((cfqd)->queue, "cfq%d%c%c %s " fmt, (cfqq)->pid, \
+ cfq_cfqq_sync((cfqq)) ? 'S' : 'A', \
+ cfqq_type((cfqq)) == SYNC_NOIDLE_WORKLOAD ? 'N' : ' ',\
__pbuf, ##args); \
} while (0)
@@ -675,7 +676,10 @@ static inline void cfqg_get(struct cfq_group *cfqg) { }
static inline void cfqg_put(struct cfq_group *cfqg) { }
#define cfq_log_cfqq(cfqd, cfqq, fmt, args...) \
- blk_add_trace_msg((cfqd)->queue, "cfq%d " fmt, (cfqq)->pid, ##args)
+ blk_add_trace_msg((cfqd)->queue, "cfq%d%c%c " fmt, (cfqq)->pid, \
+ cfq_cfqq_sync((cfqq)) ? 'S' : 'A', \
+ cfqq_type((cfqq)) == SYNC_NOIDLE_WORKLOAD ? 'N' : ' ',\
+ ##args)
#define cfq_log_cfqg(cfqd, cfqg, fmt, args...) do {} while (0)
static inline void cfqg_stats_update_io_add(struct cfq_group *cfqg,