Am Di, den 07.09.2004 schrieb Steve Blackwell um 4:58: > Hmmm. I found this link: > > http://rpmfind.rediris.es/rpm2html/fc2-i386-updates/kernel-doc-2.6.8-1.521.noarch.html > > that says that the voluntary preemption patch has already been added > but the instructions to enable voluntary preemption from > http://wiki.philkern.de/5.html Yes, it has. If you grep the kernel.spec for "preempt" you'll find the proof. * Mon Jul 12 2004 Arjan van de Ven <arjanv@xxxxxxxxxx> - updated voluntary preempt - 2.6.8-rc1 $ grep -n PREEMP /boot/config-2.6.8-1.521smp 109:# CONFIG_PREEMPT is not set 110:CONFIG_PREEMPT_VOLUNTARY=y You will have to go through kernel config, but from a quick grep through the patch and checking Kconfig entries it seems that the Fedora kernel has not all components of the voluntary preempt patch set active. So no vanilla kernel source is necessary, but to compile the kernel your own based on the Fedora source. > echo 3 > /proc/sys/kernel/voluntary-preemption > > fail because the file doesn't exist. So I'm not sure whether it has or > hasn't or perhaps there a step missing. Other than you paper says "CONFIG_SECURITY_CAPABILITIES must be compiled as a module", this part is compiled fix into the Fedora kernel. This is not preemption itself but necessary to enable users to use the realtime scheduler. $ grep -n SECURITY_CAPABILITIES /boot/config-2.6.8-1.521smp 2441:CONFIG_SECURITY_CAPABILITIES=y > Steve. Alexander -- Alexander Dalloz | Enger, Germany | GPG key 1024D/ED695653 1999-07-13 Fedora GNU/Linux Core 2 (Tettnang) kernel 2.6.8-1.521smp Serendipity 16:57:26 up 8 days, 14:14, load average: 0.08, 0.21, 0.20
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