diff options
| author | Srivatsa S. Bhat <[email protected]> | 2012-06-16 13:30:45 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <[email protected]> | 2012-07-01 11:31:22 +0000 |
| commit | 443772d408a25af62498793f6f805ce3c559309a (patch) | |
| tree | f89e50547524bbb275d38b8a39b1e4d82a18c22d /tools/perf/util/trace-event-scripting.c | |
| parent | PM / Hibernate: Enable suspend to both for in-kernel hibernation. (diff) | |
| download | kernel-443772d408a25af62498793f6f805ce3c559309a.tar.gz kernel-443772d408a25af62498793f6f805ce3c559309a.zip | |
ftrace: Disable function tracing during suspend/resume and hibernation, again
If function tracing is enabled for some of the low-level suspend/resume
functions, it leads to triple fault during resume from suspend, ultimately
ending up in a reboot instead of a resume (or a total refusal to come out
of suspended state, on some machines).
This issue was explained in more detail in commit f42ac38c59e0a03d (ftrace:
disable tracing for suspend to ram). However, the changes made by that commit
got reverted by commit cbe2f5a6e84eebb (tracing: allow tracing of
suspend/resume & hibernation code again). So, unfortunately since things are
not yet robust enough to allow tracing of low-level suspend/resume functions,
suspend/resume is still broken when ftrace is enabled.
So fix this by disabling function tracing during suspend/resume & hibernation.
Signed-off-by: Srivatsa S. Bhat <[email protected]>
Cc: [email protected]
Signed-off-by: Rafael J. Wysocki <[email protected]>
Diffstat (limited to 'tools/perf/util/trace-event-scripting.c')
0 files changed, 0 insertions, 0 deletions