From a5040c2d8dd732252609cde84ee3cdd6f1b1f927 Mon Sep 17 00:00:00 2001 From: Souvik Banerjee Date: Fri, 30 Mar 2018 14:32:42 -0500 Subject: [PATCH] blktrace: fix comment in blktrace_api.h The `__u64 time` field of the blk_io_trace struct refers to the time in nanoseconds, not in microseconds. It is set in __blk_add_trace, which does the following: t->time = ktime_to_ns(ktime_get()); ktime_to_ns returns ktime_t in nanoseconds, not microseconds. Signed-off-by: Souvik Banerjee Signed-off-by: Jens Axboe --- include/uapi/linux/blktrace_api.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/uapi/linux/blktrace_api.h b/include/uapi/linux/blktrace_api.h index 3c50e07ee833..690621b610e5 100644 --- a/include/uapi/linux/blktrace_api.h +++ b/include/uapi/linux/blktrace_api.h @@ -101,7 +101,7 @@ enum blktrace_notify { struct blk_io_trace { __u32 magic; /* MAGIC << 8 | version */ __u32 sequence; /* event number */ - __u64 time; /* in microseconds */ + __u64 time; /* in nanoseconds */ __u64 sector; /* disk offset */ __u32 bytes; /* transfer length */ __u32 action; /* what happened */ -- 2.45.2