On Sun, 29 Apr 2012 18:20:37 +0300 Avi Kivity <avi@xxxxxxxxxx> wrote: > > - cond_resched_lock() uses spin_needbreak(), and I am not sure if > > this still does rescheduling for alleviating mmu_lock contention > > without CONFIG_PREEMPT. > > IMO that's a feature. If kernel policy is not to lockbreak when > !CONFIG_PREEMPT, then we should follow it, whether it's the right thing > or not. If it's the wrong thing, change it in the kernel proper. Agreed. Anyway, we need to alleviate mmu_lock contention on server machines, where we usually do not select CONFIG_PREEMPT. So I need to check the porpose of this API. > while (1) > need_to_read_the_code_a_bit_more(); It's a pleasure! Thanks, Takuya -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
