linux-kernel - Re: [PATCH] idr: Use this_cpu_ptr() for percpu

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Message-ID: <20130821020742.GA3495@htj.dyndns.org>
Date:	Tue, 20 Aug 2013 22:07:42 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Kent Overstreet <kmo@...erainc.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
	Christoph Lameter <cl@...two.org>,
	linux-kernel@...r.kernel.org, Oleg Nesterov <oleg@...hat.com>,
	Ingo Molnar <mingo@...hat.com>,
	Andi Kleen <andi@...stfloor.org>, Jens Axboe <axboe@...nel.dk>
Subject: Re: [PATCH] idr: Use this_cpu_ptr() for percpu_ida

Hello, Kent.

On Tue, Aug 20, 2013 at 07:01:32PM -0700, Kent Overstreet wrote:
> I think Tejun and I might be at a bit of an impasse with the ida rewrite
> itself, but I don't think there were any outstanding objections to the
> percpu ida code itself - and this is a standalone version.

The percpu ida code can be applied separately from the ida rewrite?

> I was meaning to ask you Andrew, if you could take a look at the ida
> discussion and lend your opinion - I don't think there's any _specific_
> technical objections left to my ida code, and it's now on a more
> philisophical "complexity vs. ..." level.

Hmmm... the objection was pretty specific - don't depend on high-order
or vmalloc allocations when it can be easily avoided by using proper
radix tree.

Thanks.

-- 
tejun
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