linux-kernel - Re: [PATCH] radix-tree: replace preallocated node array with linked list

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Message-ID: <20150517123839.GA5575@cmpxchg.org>
Date:	Sun, 17 May 2015 08:38:39 -0400
From:	Johannes Weiner <hannes@...xchg.org>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] radix-tree: replace preallocated node array with linked
 list

On Wed, May 13, 2015 at 06:36:54PM +0300, Kirill A. Shutemov wrote:
> Currently we use per-cpu array to hold pointers to preallocated nodes.
> Let's replace it with linked list. On x86_64 it saves 256 bytes in
> per-cpu ELF section which may translate into freeing up 2MB of memory
> for NR_CPUS==8192.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

Acked-by: Johannes Weiner <hannes@...xchg.org>
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