linux-kernel - Re: [PATCH v2] mm/zsmalloc: simplify zs_max_alloc

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Date:   Mon, 3 Jul 2017 11:13:12 +0900
From:   Minchan Kim <minchan@...nel.org>
To:     Jerome Marchand <jmarchan@...hat.com>
Cc:     Nitin Gupta <ngupta@...are.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Mahendran Ganesh <opensource.ganesh@...il.com>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mm/zsmalloc: simplify zs_max_alloc_size handling

On Fri, Jun 30, 2017 at 01:48:59PM +0200, Jerome Marchand wrote:
> Commit 40f9fb8cffc6 ("mm/zsmalloc: support allocating obj with size of
> ZS_MAX_ALLOC_SIZE") fixes a size calculation error that prevented
> zsmalloc to allocate an object of the maximal size
> (ZS_MAX_ALLOC_SIZE). I think however the fix is unneededly
> complicated.
> 
> This patch replaces the dynamic calculation of zs_size_classes at init
> time by a compile time calculation that uses the DIV_ROUND_UP() macro
> already used in get_size_class_index().
> 
> Signed-off-by: Jerome Marchand <jmarchan@...hat.com>
Acked-by: Minchan Kim <minchan@...nel.org>

Thanks.