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(parent: f95499c) | patch
n_tty: Separate buffer indices to prevent cache-line sharing
authorPeter Hurley <peter@hurleysoftware.com>
Sat, 15 Jun 2013 13:14:30 +0000 (09:14 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 23 Jul 2013 23:43:02 +0000 (16:43 -0700)
commitfb7aa03db605e4f0b9a62cd4c77177c2596edd95
tree503946923a498b938aa849457310ceedaefbd806tree | snapshot (tar.gz zip)
parentf95499c3030fe1bfad57745f2db1959c5b43dca8commit | diff
n_tty: Separate buffer indices to prevent cache-line sharing

If the read buffer indices are in the same cache-line, cpus will
contended over the cache-line (so called 'false sharing').

Separate the producer-published fields from the consumer-published
fields; document the locks relevant to each field.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/n_tty.c diff | blob | blame | history