Re: [PATCH] rcu: eliminate rcu_data.last_qsctr

[Manfred Spraul]

Oleg Nesterov wrote:

> last_qsctr is used in rcu_check_quiescent_state() exclusively.
> We can reset qsctr at the start of the grace period, and then
> just test qsctr against 0.
>
> On top of the 'rcu: eliminate rcu_ctrlblk.lock', see
> http://marc.theaimsgroup.com/?l=linux-kernel&m=110156786721526
>
> Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
>
>  
Compile and boot tested with 2.6.10-rc2 on a 2-cpu system.

Signed-Off-By: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>

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