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authorJan Kara <jack@suse.cz>2013-09-17 22:30:31 +0200
committerJens Axboe <axboe@kernel.dk>2013-11-08 08:59:00 -0700
commita404d5576bbe586a1097a8bc2f32c5f22651b0aa (patch)
tree011e6b1f5862a55485a9b9b32f19001c0b65e803 /include/linux/blktrace_api.h
parent5e01dc7b26d9f24f39abace5da98ccbd6a5ceb52 (diff)
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blktrace: Send BLK_TN_PROCESS events to all running traces
Currently each task sends BLK_TN_PROCESS event to the first traced device it interacts with after a new trace is started. When there are several traced devices and the task accesses more devices, this logic can result in BLK_TN_PROCESS being sent several times to some devices while it is never sent to other devices. Thus blkparse doesn't display command name when parsing some blktrace files. Fix the problem by sending BLK_TN_PROCESS event to all traced devices when a task interacts with any of them. Signed-off-by: Jan Kara <jack@suse.cz> Review-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/blktrace_api.h')
-rw-r--r--include/linux/blktrace_api.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index 7c2e030..a12f6ed 100644
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -5,6 +5,7 @@
#include <linux/relay.h>
#include <linux/compat.h>
#include <uapi/linux/blktrace_api.h>
+#include <linux/list.h>
#if defined(CONFIG_BLK_DEV_IO_TRACE)
@@ -23,6 +24,7 @@ struct blk_trace {
struct dentry *dir;
struct dentry *dropped_file;
struct dentry *msg_file;
+ struct list_head running_list;
atomic_t dropped;
};
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