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| author | Peter Hurley <peter@hurleysoftware.com> | 2014-10-16 21:51:30 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-06 03:14:09 +0300 |
| commit | 37b164578826406a173ca7c20d9ba7430134d23e (patch) | |
| tree | c3e53ae6a03334b9600929f6b6bac919b7390b87 /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | 547039ec502076e60034eeb79611df3433a99b7d (diff) | |
| download | linux-37b164578826406a173ca7c20d9ba7430134d23e.tar.xz | |
tty: Fix high cpu load if tty is unreleaseable
Kernel oops can cause the tty to be unreleaseable (for example, if
n_tty_read() crashes while on the read_wait queue). This will cause
tty_release() to endlessly loop without sleeping.
Use a killable sleep timeout which grows by 2n+1 jiffies over the interval
[0, 120 secs.) and then jumps to forever (but still killable).
NB: killable just allows for the task to be rewoken manually, not
to be terminated.
Cc: <stable@vger.kernel.org> # since before 2.6.32
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions