Re: [PATCH 3/4 changelog-v2] KVM: Switch to srcu-less get_dirty_log()

[Marcelo Tosatti]

On Wed, Mar 07, 2012 at 05:18:26PM +0900, Takuya Yoshikawa wrote:
> Marcelo Tosatti <mtosatti@xxxxxxxxxx> wrote:
> 
> > > We cannot drop the lock.
> > > Do you mean doing TLB flush each time before dropping the lock?
> > 
> > Yes, only if there is contention (see cond_resched_lock).
> 
> But how can we conditionally call kvm_flush_remote_tlbs() from
> inside __cond_resched_lock right before spin_unlock()?
>
> We need another API.

Yep, a callback into cond_resched_lock_cb (or something) 
could do it.

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