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From: Minchan Kim <minchan.kim@gmail.com>
To: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: gregkh@suse.de, Chris Mason <chris.mason@oracle.com>,
	akpm@linux-foundation.org, torvalds@linux-foundation.org,
	matthew@wil.cx, linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	ngupta@vflare.org, jeremy@goop.org,
	Kurt Hackel <kurt.hackel@oracle.com>,
	npiggin@kernel.dk, riel@redhat.com,
	Konrad Wilk <konrad.wilk@oracle.com>,
	mel@csn.ul.ie, kosaki.motohiro@jp.fujitsu.com,
	sfr@canb.auug.org.au, wfg@mail.ustc.edu.cn, tytso@mit.edu,
	viro@zeniv.linux.org.uk, hughd@google.com, hannes@cmpxchg.org
Subject: Re: [PATCH V2 2/3] drivers/staging: zcache: host services and PAM services
Date: Thu, 10 Feb 2011 08:58:19 +0900	[thread overview]
Message-ID: <AANLkTi=XZ55feAHHfV0GbzG6dhYFj_E0TdnH8JHQe6rJ@mail.gmail.com> (raw)
In-Reply-To: <AANLkTinwZJrAWo_Fat3e6WwLn+MPdZyFVgT6sckLCUo3@mail.gmail.com>

On Thu, Feb 10, 2011 at 8:57 AM, Minchan Kim <minchan.kim@gmail.com> wrote:
> On Thu, Feb 10, 2011 at 1:39 AM, Dan Magenheimer
> <dan.magenheimer@oracle.com> wrote:
>>
>>
>>> From: Minchan Kim [mailto:minchan.kim@gmail.com]
>>
>>> As I read your comment, I can't find the benefit of zram compared to
>>> frontswap.
>>
>> Well, I am biased, but I agree that frontswap is a better technical
>> solution than zram. ;-)  But "dynamic-ity" is very important to
>> me and may be less important to others.
>>
>> I thought of these other differences, both technical and
>> non-technical:
>>
>> - Zram is minimally invasive to the swap subsystem, requiring only
>>  one hook which is already upstream (though see below) and is
>>  apparently already used by some Linux users.  Frontswap is somewhat
>
> Yes. I think what someone is using it is a problem.
>
>>  more invasive and, UNTIL zcache-was-kztmem was posted a few weeks
>>  ago, had no non-Xen users (though some distros are already shipping
>>  the hooks in their kernels because Xen supports it); as a result,
>>  frontswap has gotten almost no review by kernel swap subsystem
>>  experts who I'm guessing weren't interested in anything that
>>  required Xen to use... hopefully that barrier is now resolved
>>  (but bottom line is frontswap is not yet upstream).
>
> That's why I suggested to remove frontswap in this turn.
> If any swap experts has a interest, maybe you can't receive any ack or

Typo.
If any swap experts don't have a interest,


-- 
Kind regards,
Minchan Kim

  reply	other threads:[~2011-02-09 23:58 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-07  3:26 Dan Magenheimer
2011-02-08 22:48 ` Minchan Kim
2011-02-08 23:27   ` Dan Magenheimer
2011-02-08 23:56     ` Minchan Kim
2011-02-09 16:39       ` Dan Magenheimer
2011-02-09 17:36         ` Nitin Gupta
2011-02-09 23:46           ` Minchan Kim
2011-02-10  1:17             ` Nitin Gupta
2011-02-09 23:57         ` Minchan Kim
2011-02-09 23:58           ` Minchan Kim [this message]
2011-02-15 16:53 ` Konrad Rzeszutek Wilk
2011-02-15 17:25   ` Greg KH
2011-02-15 18:18     ` Konrad Rzeszutek Wilk

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