* [Bug tapsets/16540] New: the scsi tapset could use the scsi tracepoints
@ 2014-02-07 17:32 dsmith at redhat dot com
2014-02-10 16:00 ` [Bug tapsets/16540] " dsmith at redhat dot com
2014-02-10 23:12 ` dsmith at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: dsmith at redhat dot com @ 2014-02-07 17:32 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=16540
Bug ID: 16540
Summary: the scsi tapset could use the scsi tracepoints
Product: systemtap
Version: unspecified
Status: NEW
Severity: enhancement
Priority: P2
Component: tapsets
Assignee: systemtap at sourceware dot org
Reporter: dsmith at redhat dot com
In newer kernels, scsi tracepoints have been added:
# stap -L 'kernel.trace("*scsi*")'
kernel.trace("scsi_dispatch_cmd_done") $cmd:struct scsi_cmnd*
kernel.trace("scsi_dispatch_cmd_error") $cmd:struct scsi_cmnd* $rtn:int
kernel.trace("scsi_dispatch_cmd_start") $cmd:struct scsi_cmnd*
kernel.trace("scsi_dispatch_cmd_timeout") $cmd:struct scsi_cmnd*
kernel.trace("scsi_eh_wakeup") $shost:struct Scsi_Host*
Support for these tracepoints could be added to the scsi tapset. For instance,
the 'scsi_dispatch_cmd_done' tracepoint is called as the first thing in the
scsi_done() function, which means the scsi.iodone probe alias could be written
to prefer the tracepoint to a function probe.
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* [Bug tapsets/16540] the scsi tapset could use the scsi tracepoints
2014-02-07 17:32 [Bug tapsets/16540] New: the scsi tapset could use the scsi tracepoints dsmith at redhat dot com
@ 2014-02-10 16:00 ` dsmith at redhat dot com
2014-02-10 23:12 ` dsmith at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: dsmith at redhat dot com @ 2014-02-10 16:00 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=16540
David Smith <dsmith at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from David Smith <dsmith at redhat dot com> ---
The 'scsi_dispatch_cmd_done' tracepoint was the only exact match to a probe
point. Support for that tracepoint was added to the scsi.iodone probe alias in
commit 448be91.
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* [Bug tapsets/16540] the scsi tapset could use the scsi tracepoints
2014-02-07 17:32 [Bug tapsets/16540] New: the scsi tapset could use the scsi tracepoints dsmith at redhat dot com
2014-02-10 16:00 ` [Bug tapsets/16540] " dsmith at redhat dot com
@ 2014-02-10 23:12 ` dsmith at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: dsmith at redhat dot com @ 2014-02-10 23:12 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=16540
--- Comment #2 from David Smith <dsmith at redhat dot com> ---
An additional fix for older kernels was added in commit c593027.
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You are the assignee for the bug.
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2014-02-07 17:32 [Bug tapsets/16540] New: the scsi tapset could use the scsi tracepoints dsmith at redhat dot com
2014-02-10 16:00 ` [Bug tapsets/16540] " dsmith at redhat dot com
2014-02-10 23:12 ` dsmith at redhat dot com
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