Re: [RFCv2 PATCH 14/15] V4L: improve the BKL replacement heuristic

2010-11-17 Thread Arnd Bergmann
On Tuesday 16 November 2010 22:56:45 Hans Verkuil wrote: The BKL replacement mutex had some serious performance side-effects on V4L drivers. It is replaced by a better heuristic that works around the worst of the side-effects. Read the v4l2-dev.c comments for the whole sorry story. This is a

[RFCv2 PATCH 14/15] V4L: improve the BKL replacement heuristic

2010-11-16 Thread Hans Verkuil
The BKL replacement mutex had some serious performance side-effects on V4L drivers. It is replaced by a better heuristic that works around the worst of the side-effects. Read the v4l2-dev.c comments for the whole sorry story. This is a temporary measure only until we can convert all v4l drivers