From: Wanpeng Li <liwanp@linux.vnet.ibm.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Dan Magenheimer <dan.magenheimer@oracle.com>,
Seth Jennings <sjenning@linux.vnet.ibm.com>,
Konrad Rzeszutek Wilk <konrad@darnok.org>,
Minchan Kim <minchan@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 2/5] zero-filled pages awareness
Date: Tue, 19 Mar 2013 09:23:16 +0800 [thread overview]
Message-ID: <20130319012316.GB17584@hacker.(null)> (raw)
In-Reply-To: <20130319005023.GA19891@kroah.com>
On Mon, Mar 18, 2013 at 05:50:23PM -0700, Greg Kroah-Hartman wrote:
>On Fri, Mar 15, 2013 at 10:34:17AM +0800, Wanpeng Li wrote:
>> Compression of zero-filled pages can unneccessarily cause internal
>> fragmentation, and thus waste memory. This special case can be
>> optimized.
>>
>> This patch captures zero-filled pages, and marks their corresponding
>> zcache backing page entry as zero-filled. Whenever such zero-filled
>> page is retrieved, we fill the page frame with zero.
>>
>> Acked-by: Dan Magenheimer <dan.magenheimer@oracle.com>
>> Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
>
>This patch applies with a bunch of fuzz, meaning it wasn't made against
>the latest tree, which worries me. Care to redo it, and the rest of the
>series, and resend it?
Ok, sorry for the confusing, I will do it today, thanks Greg. :-)
Regards,
Wanpeng Li
>
>thanks,
>
>greg k-h
>
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next prev parent reply other threads:[~2013-03-19 1:23 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-15 2:34 [PATCH v3 0/5] zcache: Support zero-filled pages more efficiently Wanpeng Li
2013-03-15 2:34 ` Wanpeng Li
2013-03-15 2:34 ` [PATCH v3 1/5] introduce zero filled pages handler Wanpeng Li
2013-03-15 2:34 ` Wanpeng Li
2013-03-15 2:34 ` [PATCH v3 2/5] zero-filled pages awareness Wanpeng Li
2013-03-15 2:34 ` Wanpeng Li
2013-03-16 14:12 ` Bob Liu
2013-03-16 14:12 ` Bob Liu
2013-03-17 0:04 ` Wanpeng Li
2013-03-17 0:04 ` Wanpeng Li
2013-03-19 0:50 ` Greg Kroah-Hartman
2013-03-19 0:50 ` Greg Kroah-Hartman
2013-03-19 1:23 ` Wanpeng Li
2013-03-19 1:23 ` Wanpeng Li [this message]
2013-03-15 2:34 ` [PATCH v3 3/5] handle zcache_[eph|pers]_zpages for zero-filled page Wanpeng Li
2013-03-15 2:34 ` Wanpeng Li
2013-03-16 13:11 ` Konrad Rzeszutek Wilk
2013-03-16 13:11 ` Konrad Rzeszutek Wilk
2013-03-17 0:05 ` Wanpeng Li
2013-03-17 0:05 ` Wanpeng Li
2013-03-15 2:34 ` [PATCH v3 4/5] introduce zero-filled page stat count Wanpeng Li
2013-03-15 2:34 ` Wanpeng Li
2013-03-15 2:34 ` [PATCH v3 5/5] clean TODO list Wanpeng Li
2013-03-15 2:34 ` Wanpeng Li
2013-03-19 0:23 ` [PATCH v3 0/5] zcache: Support zero-filled pages more efficiently Greg Kroah-Hartman
2013-03-19 0:23 ` Greg Kroah-Hartman
2013-03-19 1:13 ` Wanpeng Li
2013-03-19 1:13 ` Wanpeng Li
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