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blktrace: port to tracepoints

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This was a forward port of work done by Mathieu Desnoyers, I changed it to
encode the 'what' parameter on the tracepoint name, so that one can register
interest in specific events and not on classes of events to then check the
'what' parameter.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Arnaldo Carvalho de Melo 2008-10-30 08:34:33 +01:00 • committed by Ingo Molnar
commit 5f3ea37c77
9 changed files with 418 additions and 199 deletions
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1
block/Kconfig
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@ -47,6 +47,7 @@ config BLK_DEV_IO_TRACE
depends on SYSFS
select RELAY
select DEBUG_FS
select TRACEPOINTS
help
Say Y here if you want to be able to trace the block layer actions
on a given queue. Tracing allows you to see any traffic happening