linux-kernel - Re: [PATCH] mm/sparse.c: Wrong allocation for mem

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Date:   Sat, 23 Dec 2017 12:54:19 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Baoquan He <bhe@...hat.com>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...capital.net>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Atsushi Kumagai <ats-kumagai@...jp.nec.com>, linux-mm@...ck.org
Subject: Re: [PATCH] mm/sparse.c: Wrong allocation for mem_section

On Fri, Dec 22, 2017 at 04:48:18PM +0800, Baoquan He wrote:
> In commit
> 
>   83e3c48729 "mm/sparsemem: Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y"
> 
> mem_section is allocated at runtime to save memory. While it allocates
> the first dimension of array with sizeof(struct mem_section). It costs 
> extra memory, should be sizeof(struct mem_section*).
> 
> Fix it.
> 
> Signed-off-by: Baoquan He <bhe@...hat.com>
> Tested-by: Dave Young <dyoung@...hat.com>
> Cc: Ingo Molnar <mingo@...nel.org>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Andy Lutomirski <luto@...capital.net>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Atsushi Kumagai <ats-kumagai@...jp.nec.com>
> Cc: linux-mm@...ck.org

Ughh. Sorry.

Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

Please queue it to stable.

-- 
 Kirill A. Shutemov