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Old 08-28-2008, 06:49 AM
Anand Kumria
 
Default Bug#496871: linux-2.6: please change the PREEMPT settings

Package: linux-2.6
Severity: normal

Hi,

Bugs #292061 and #311185 are contradictory. One asks for it to be disabled, the other enabled.

I spoke with Simon Horman and he said:

<wildfire> horms, why doesn't the debian linux kernel set preempt to on?
<horms> wildfire: nfi
<horms> i believe back in my day it was too experimental
<horms> but i have no idea why it is still off

We also checked a few other distributions:
Ubuntu (feisty): CONFIG_PREEMPT_VOLUNTARY=y/CONFIG_PREEMPT_BKL=y
RHEL 5.1: CONFIG_PREEMPT_VOLUNTARY=y, CONFIG_PREEMPT_BKL=y
master.kernel.org: CONFIG_PREEMPT_NOTIFIERS=y, CONFIG_PREEMPT_VOLUNTARY=y

(all machines are either ia64 or x86_64)

So the censensus would seem to be to set:

CONFIG_PREEMPT_VOLUNTARY=y
CONFIG_PREEMPT_BKL=y
CONFIG_PREEMPT_NOTIFIERS=y (already set in Debian)

Could you please make it so, and close out the two above-mentioned reports?

Thanks,
Anand

-- System Information:
Debian Release: lenny/sid
APT prefers testing
APT policy: (650, 'testing'), (600, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.26-1-686 (SMP w/1 CPU core)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash



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