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Date: Wed, 25 Apr 2012 11:37:54 -0500
From: Seth Jennings <sjenning@linux.vnet.ibm.com>
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To: Minchan Kim <minchan@kernel.org>
CC: Nitin Gupta <ngupta@vflare.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Dan Magenheimer <dan.magenheimer@oracle.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 6/6] zsmalloc: make zsmalloc portable
References: <1335334994-22138-1-git-send-email-minchan@kernel.org> <1335334994-22138-7-git-send-email-minchan@kernel.org> <4F980AFE.60901@vflare.org>
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Hey Minchan,

Thanks for the patches!

On 04/25/2012 09:32 AM, Nitin Gupta wrote:
> I think Seth was working on this improvement but not sure about the
> current status. Seth?

Yes, I looked at this option, and it is very clean and portable.

Unfortunately, IIRC, with our rate of mapping/unmapping,
flush_tlb_kernel_range() causes an IPI storm that effective
stalls the machine.

I'll apply your patch and try it out.

Thanks,
Seth