14 Feb, 2008
1 commit
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RCU style multiple probes support for the Linux Kernel Markers. Common case
(one probe) is still fast and does not require dynamic allocation or a
supplementary pointer dereference on the fast path.- Move preempt disable from the marker site to the callback.
Since we now have an internal callback, move the preempt disable/enable to the
callback instead of the marker site.Since the callback change is done asynchronously (passing from a handler that
supports arguments to a handler that does not setup the arguments is no
arguments are passed), we can safely update it even if it is outside the
preempt disable section.- Move probe arm to probe connection. Now, a connected probe is automatically
armed.Remove MARK_MAX_FORMAT_LEN, unused.
This patch modifies the Linux Kernel Markers API : it removes the probe
"arm/disarm" and changes the probe function prototype : it now expects a
va_list * instead of a "...".If we want to have more than one probe connected to a marker at a given
time (LTTng, or blktrace, ssytemtap) then we need this patch. Without it,
connecting a second probe handler to a marker will fail.It allow us, for instance, to do interesting combinations :
Do standard tracing with LTTng and, eventually, to compute statistics
with SystemTAP, or to have a special trigger on an event that would call
a systemtap script which would stop flight recorder tracing.Signed-off-by: Mathieu Desnoyers
Cc: Christoph Hellwig
Cc: Mike Mason
Cc: Dipankar Sarma
Cc: David Smith
Cc: "Paul E. McKenney"
Cc: "Frank Ch. Eigler"
Cc: Steven Rostedt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
25 Jan, 2008
2 commits
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This is a more complex example showing how to create a kset and a ktype
and some default attributes for a group of kobjects.Cc: Kay Sievers
Signed-off-by: Greg Kroah-Hartman -
This is a simple kobject module, showing how to use kobj_attributes in
basic and more complex ways.Cc: Kay Sievers
Signed-off-by: Greg Kroah-Hartman
15 Nov, 2007
1 commit
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Add the field names to marker example format string.
Signed-off-by: Mathieu Desnoyers
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
20 Oct, 2007
2 commits
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Module example showing how to use the Linux Kernel Markers.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Mathieu Desnoyers
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Begin infrastructure for kernel code samples in the samples/ directory.
Add its Kconfig and Kbuild files.
Source its Kconfig file in all arch/ Kconfigs.Signed-off-by: Randy Dunlap
Signed-off-by: Mathieu Desnoyers
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds