From: Weijie Yang <weijie.yang.kh@gmail.com>
To: Dan Streetman <ddstreet@ieee.org>
Cc: Vladimir Murzin <murzin.v@gmail.com>,
linux-mm@kvack.org, Seth Jennings <sjennings@variantweb.net>,
linux-kernel <linux-kernel@vger.kernel.org>,
Bob Liu <bob.liu@oracle.com>, Minchan Kim <minchan@kernel.org>,
Weijie Yang <weijie.yang@samsung.com>
Subject: Re: [PATCH] mm/zswap: change params from hidden to ro
Date: Thu, 21 Nov 2013 11:12:58 +0800 [thread overview]
Message-ID: <CAL1ERfMdOQ+DKiYEVBpP54RZYQWS_-7Xgf2YTA5jAZRxWsE6ag@mail.gmail.com> (raw)
In-Reply-To: <CALZtONA81=R4abFMpMMtDZKQe0s-8+JxvEfZO3NEZ910VwRDmw@mail.gmail.com>
On Thu, Nov 21, 2013 at 1:52 AM, Dan Streetman <ddstreet@ieee.org> wrote:
> On Wed, Nov 20, 2013 at 12:33 PM, Vladimir Murzin <murzin.v@gmail.com> wrote:
>> Hi Dan!
>>
>> On Wed, Nov 20, 2013 at 11:38:42AM -0500, Dan Streetman wrote:
>>> The "compressor" and "enabled" params are currently hidden,
>>> this changes them to read-only, so userspace can tell if
>>> zswap is enabled or not and see what compressor is in use.
>>
>> Could you elaborate more why this pice of information is necessary for
>> userspace?
>
> For anyone interested in zswap, it's handy to be able to tell if it's
> enabled or not ;-) Technically people can check to see if the zswap
> debug files are in /sys/kernel/debug/zswap, but I think the actual
> "enabled" param is more obvious. And the compressor param is really
> the only way anyone from userspace can see what compressor's being
> used; that's helpful to know for anyone that might want to be using a
> non-default compressor.
>
> And of course, eventually we'll want to make the params writable, so
> the compressor can be changed dynamically, and zswap can be enabled or
> disabled dynamically (or at least enabled after boot).
Please do not make them writable.
There is no requirement to do that, and it will make zswap more complex.
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next prev parent reply other threads:[~2013-11-21 3:12 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-20 16:38 Dan Streetman
2013-11-20 17:33 ` Vladimir Murzin
2013-11-20 17:52 ` Dan Streetman
2013-11-21 3:12 ` Weijie Yang [this message]
2013-11-21 22:36 ` Dan Streetman
2013-11-22 7:38 ` Vladimir Murzin
2013-11-22 17:18 ` Dan Streetman
2013-11-24 14:15 ` Vladimir Murzin
2013-11-22 17:21 ` Seth Jennings
2013-12-13 20:56 ` Dan Streetman
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