Re: [PATCH-v5 1/6] idr: Percpu ida

[Andrew Morton]

On Tue, 03 Sep 2013 09:06:58 -0700 "Nicholas A. Bellinger" <nab@xxxxxxxxxxxxxxx> wrote:

> Are there any other review comments to be addressed for this patch..?
> 
> If not, please kindly give your Reviewed-by if your OK for an initial
> standalone merge.

Sorry, I'm largely offline for the next week...

It looks OK to me (that's as close as I get to an ack :))

Nit:

> +		if (cpu >= nr_cpu_ids)
> +			cpu = cpumask_first(&pool->cpus_have_tags);
> +
> +		if (cpu >= nr_cpu_ids)
> +			BUG();

The second `if' can be moved inside the first, but hopefully the
compiler already did that.

I have dim memories that doing

	local_irq_save()
	spin_lock()

is not equivalent to

	spin_lock_irqsave()

in some circumstances.  Perhaps a lockdep thing.  Or perhaps this was fixed in
the intervening years and this is no longer the case.

Such things probably won't be detected during 3.12-rcX because few
people will test iscsi, I expect.  So please be sure that you've
runtime tested it with all the lockdeppy things enabled. 
Documentation/SubmitChecklist section 12 has a list, but it might be
dated.
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