Message-ID: <4FBD4DDF.5080905@linux.vnet.ibm.com>
Date: Wed, 23 May 2012 15:51:43 -0500
From: Seth Jennings <sjenning@linux.vnet.ibm.com>
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To: Minchan Kim <minchan@kernel.org>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Nitin Gupta <ngupta@vflare.org>,
        Dan Magenheimer <dan.magenheimer@oracle.com>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Russell King <linux@arm.linux.org.uk>,
        Ralf Baechle <ralf@linux-mips.org>, Paul Mundt <lethal@linux-sh.org>,
        Guan Xuetao <gxt@mprc.pku.edu.cn>,
        Chen Liqin <liqin.chen@sunplusct.com>
Subject: Re: [PATCH v2 1/3] zsmalloc: support zsmalloc to ARM, MIPS, SUPERH
References: <1337133919-4182-1-git-send-email-minchan@kernel.org>
In-Reply-To: <1337133919-4182-1-git-send-email-minchan@kernel.org>
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On 05/15/2012 09:05 PM, Minchan Kim wrote:

> zsmalloc uses set_pte and __flush_tlb_one for performance but
> many architecture don't support it. so this patch removes
> set_pte and __flush_tlb_one which are x86 dependency.
> Instead of it, use local_flush_tlb_kernel_range which are available
> by more architectures. It would be better than supporting only x86
> and last patch in series will enable again with supporting
> local_flush_tlb_kernel_range in x86.
> 
> About local_flush_tlb_kernel_range,
> If architecture is very smart, it could flush only tlb entries related to vaddr.
> If architecture is smart, it could flush only tlb entries related to a CPU.
> If architecture is _NOT_ smart, it could flush all entries of all CPUs.
> So, it would be best to support both portability and performance.
> 
> Cc: Russell King <linux@arm.linux.org.uk>
> Cc: Ralf Baechle <ralf@linux-mips.org>
> Cc: Paul Mundt <lethal@linux-sh.org>
> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
> Cc: Chen Liqin <liqin.chen@sunplusct.com>
> Signed-off-by: Minchan Kim <minchan@kernel.org>


For the zsmalloc changes:

Acked-by: Seth Jennings <sjenning@linux.vnet.ibm.com>

Thanks,
Seth

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