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| author | Peter Hurley <peter@hurleysoftware.com> | 2014-10-16 13:51:30 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-14 08:48:00 -0800 |
| commit | a88f5eaa6802026c97ebe34c2b961d60ad9c5bfa (patch) | |
| tree | 1d39096a21ccf39db62d89e239314099efc8120a /kernel/power/hibernate.c | |
| parent | 33d90ee4d0318fb1ec5bba6a8b9f4fa2d5333d3c (diff) | |
| download | lwn-a88f5eaa6802026c97ebe34c2b961d60ad9c5bfa.tar.gz lwn-a88f5eaa6802026c97ebe34c2b961d60ad9c5bfa.zip | |
tty: Fix high cpu load if tty is unreleaseable
commit 37b164578826406a173ca7c20d9ba7430134d23e upstream.
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.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/power/hibernate.c')
0 files changed, 0 insertions, 0 deletions