Messages in this thread | | | Subject | Multiple Tracers | From | Steven Whitehouse <> | Date | Wed, 08 Apr 2009 14:35:03 +0100 |
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Hi,
A little while back I posted a RFC patch which added gfs2 glock tracing to blktrace. There was a suggestion that I should look instead at the generic tracing code and add a new tracer, but I've come up with a couple of issues along the way.
I think from what I can see that its only possible to run a single tracer at once, so running blktrace (for example) would preclude me from also tracing gfs2's glocks at the same time. Also, I can see no mechanism by which I could ensure the sequencing between the blktrace and glock traces other than exporting the blktrace sequence number, even if running multiple tracers at the same time was possible.
Is there a solution to this which I've not spotted, or would something along the lines of my previous patch[*] be a reasonable solution at this stage?
Steve.
[*] http://markmail.org/message/ujkd6bre2td27pfb
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