linux-kernel - Re: [PATCH v2] mm: show free pages per each migrate type

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Message-Id: <20150409212441.a64c3fe0.akpm@linux-foundation.org>
Date:	Thu, 9 Apr 2015 21:24:41 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	ZhangNeil <neilzhang1123@...mail.com>
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] mm: show free pages per each migrate type

On Fri, 10 Apr 2015 04:16:15 +0000 ZhangNeil <neilzhang1123@...mail.com> wrote:

> > I think we can eliminate nr_free[][]:
> 
> what about make it as global__variable?

That isn't as good - it permanently consumes memory and really requires
new locking to protect the array from concurrent callers.

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