Messages in this thread | | | Date | Wed, 4 Sep 2013 01:20:14 +0200 | Subject | Re: [PATCH v7 1/4] spinlock: A new lockref structure for lockless update of refcount | From | Sedat Dilek <> |
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On Wed, Sep 4, 2013 at 1:15 AM, Dave Jones <davej@redhat.com> wrote: > On Wed, Sep 04, 2013 at 01:05:38AM +0200, Sedat Dilek wrote: > > On Wed, Sep 4, 2013 at 12:55 AM, Dave Jones <davej@redhat.com> wrote: > > > On Wed, Sep 04, 2013 at 12:37:25AM +0200, Sedat Dilek wrote: > > > > > > > > You're spending more time on the task stats than on the actual lookup. > > > > > Maybe you should turn off CONFIG_TASKSTATS..But why that whole > > > > > irq_return thing? Odd. > > > > > > > > > > > > > [ init/Kconfig ] > > > > ... > > > > config TASKSTATS > > > > bool "Export task/process statistics through netlink" > > > > depends on NET <--- Difficult to disable it?! > > > > > > More likely you're getting bitten by the fact that CONFIG_KVM has > > > a 'select TASKSTATS' > > > > > > > With CONFIG_KVM=n ... > > > > $ egrep 'CONFIG_NET=|CONFIG_KVM=|CONFIG_TASKSTATS' .config > > CONFIG_TASKSTATS=y > > CONFIG_NET=y > > Weird. > > sed -i '/TASKSTATS/d' .config > sed -i '/KVM/d' .config > make oldconfig > ... > egrep 'CONFIG_NET=|CONFIG_KVM=|CONFIG_TASKSTATS' .config > # CONFIG_TASKSTATS is not set > CONFIG_NET=y > > > The NET dependancy shouldn't matter at all. > I don't see any other 'select TASKSTATS' in the tree. >
Ah, cool.
With CONFIG_KVM=n and CONFIG_TASKSTATS=n plus...
$ yes "" | make oldconfig && make silentoldconfig </dev/null
...I get now:
$ egrep 'CONFIG_NET=|CONFIG_KVM=|CONFIG_TASKSTATS' .config # CONFIG_TASKSTATS is not set CONFIG_NET=y
Thanks, Dave!
- Sedat -
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