Messages in this thread | | | Date | Tue, 14 Apr 2009 17:32:07 -0400 | From | Theodore Tso <> | Subject | Re: blktrace: event traces displayed wrong while ftrace blktrace is active |
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On Tue, Apr 14, 2009 at 11:25:33PM +0200, Frederic Weisbecker wrote: > > Indeed. Note that you can overwrite this default by typing: > > echo context-info > trace_option > > after setting bkltrace as the current tracer.
The problem with doing that is that blktrace will then display this:
fsync-tester-27934 [001] 208.031278: fsync-tester-27934 [001] 208.031278: 254,4 Q WS 268392 + 8 [fsync-tester]
I think the real problem is that blk trace is displaying the standard context-info, so it's suppressing the normal context info. So I have the choice on having no context information on my event trace lines, or two copies of the context information for the block trace lines.
:-(
I'm guessing things were done this way in order to support the old legancy blktrace format?
- Ted
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