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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 09:00:10 -0800 |
| commit | 2ceee507fac81179f206691fec3163839c5dd5d8 (patch) | |
| tree | d14bb14c2ef0f06248c73c3a7128707f971df174 /kernel | |
| parent | 905290c5f3143eb78683bb24ec3f434fc0abb48b (diff) | |
| download | kernel-common-2ceee507fac81179f206691fec3163839c5dd5d8.tar.gz kernel-common-2ceee507fac81179f206691fec3163839c5dd5d8.tar.bz2 kernel-common-2ceee507fac81179f206691fec3163839c5dd5d8.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')
0 files changed, 0 insertions, 0 deletions