On Mon, 23.02.09 10:14, Colin Guthrie (gmane at colin.guthr.ie) wrote: > > 'Twas brillig, and Lennart Poettering at 23/02/09 02:05 did gyre and gimble: >> OpenSUSE apparently does not enable it. The same is true for >> Ubuntu. Same for Debian. Note sure about Mandriva. > > Here is a (not quite current) grep from my running kernel (it's .27 as > .28/.29 both break my intel graphics :( at the moment): > > $ zgrep -E "HZ|PREEMP" /proc/config.gz > CONFIG_PREEMPT_NOTIFIERS=y > CONFIG_NO_HZ=y > # CONFIG_PREEMPT_NONE is not set > CONFIG_PREEMPT_VOLUNTARY=y > # CONFIG_PREEMPT is not set > # CONFIG_HZ_100 is not set > # CONFIG_HZ_250 is not set > # CONFIG_HZ_300 is not set > CONFIG_HZ_1000=y > CONFIG_HZ=1000 > CONFIG_MACHZ_WDT=m > > I'll ask our kernel team why PREEMPT is not on as I've no idea of the > consequences. My guess is that it relates to graphics drivers... The Fedora kernels set PREEMPT_VOLUNTARY as well as it seems. Lennart -- Lennart Poettering Red Hat, Inc. lennart [at] poettering [dot] net ICQ# 11060553 http://0pointer.net/lennart/ GnuPG 0x1A015CC4
