diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2014-10-16 13:51:30 -0400 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2014-11-23 10:55:47 +0100 |
| commit | 26967a02542d7e0673f82bc1b71e467f37e0f858 (patch) | |
| tree | d663a95a429532c8a694bef954d69f2cf6d61b8b /net | |
| parent | 237d7b2521815c41c245ca22219f4cca2ec75058 (diff) | |
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>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 37b164578826406a173ca7c20d9ba7430134d23e)
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions