tracing/ftrace: change the type of the print_line callback

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We need a kind of disambiguation when a print_line callback
returns 0.

_There is not enough space to print all the entry.
 Please flush the seq and retry.
_I can't handle this type of entry

This patch changes the type of this callback for better information.

Also some changes have been made in this V2.

_ Only relay to default functions after the print_line callback fails.
_ This patch doesn't fix the issue with the broken pipe (see patch 2/4 for that)

Some things are still in discussion:

_ Find better names for the enum print_line_t values
_ Change the type of print_trace_line into boolean.

Patches to change that can be sent later.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Pekka Paalanen <pq@iki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

Frederic Weisbecker 2008-09-29 20:18:34 +02:00 • committed by Ingo Molnar

parent 777e208d40

commit 2c4f035f6c

2 changed files with 50 additions and 37 deletions

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77

kernel/trace/trace.c

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10

kernel/trace/trace.h

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