From: Anton Vorontsov <anton@enomsg.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Minchan Kim <minchan@kernel.org>,
Luiz Capitulino <lcapitulino@redhat.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org, mhocko@suse.cz,
kmpark@infradead.org, hyunhee.kim@samsung.com
Subject: Re: [PATCH v2] vmpressure: implement strict mode
Date: Thu, 27 Jun 2013 22:07:12 -0700 [thread overview]
Message-ID: <20130628050712.GA10097@teo> (raw)
In-Reply-To: <20130628043411.GA9100@teo>
On Thu, Jun 27, 2013 at 09:34:11PM -0700, Anton Vorontsov wrote:
> ... we can add the strict mode and deprecate the
> "filtering" -- basically we'll implement the idea of requiring that
> userspace registers a separate fd for each level.
Btw, assuming that more levels can be added, there will be a problem:
imagine that an app hooked up onto low, med, crit levels in "strict"
mode... then once we add a new level, the app will start missing the new
level events.
In the old scheme it is not a problem because of the >= condition.
With a proper versioning this won't be a problem for a new scheme too.
Anton
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WARNING: multiple messages have this Message-ID (diff)
From: Anton Vorontsov <anton@enomsg.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Minchan Kim <minchan@kernel.org>,
Luiz Capitulino <lcapitulino@redhat.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org, mhocko@suse.cz,
kmpark@infradead.org, hyunhee.kim@samsung.com
Subject: Re: [PATCH v2] vmpressure: implement strict mode
Date: Thu, 27 Jun 2013 22:07:12 -0700 [thread overview]
Message-ID: <20130628050712.GA10097@teo> (raw)
In-Reply-To: <20130628043411.GA9100@teo>
On Thu, Jun 27, 2013 at 09:34:11PM -0700, Anton Vorontsov wrote:
> ... we can add the strict mode and deprecate the
> "filtering" -- basically we'll implement the idea of requiring that
> userspace registers a separate fd for each level.
Btw, assuming that more levels can be added, there will be a problem:
imagine that an app hooked up onto low, med, crit levels in "strict"
mode... then once we add a new level, the app will start missing the new
level events.
In the old scheme it is not a problem because of the >= condition.
With a proper versioning this won't be a problem for a new scheme too.
Anton
next prev parent reply other threads:[~2013-06-28 5:07 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-27 3:17 [PATCH v2] vmpressure: implement strict mode Luiz Capitulino
2013-06-27 3:17 ` Luiz Capitulino
2013-06-27 9:26 ` Michal Hocko
2013-06-27 9:26 ` Michal Hocko
2013-06-27 13:34 ` Luiz Capitulino
2013-06-27 13:34 ` Luiz Capitulino
2013-06-27 14:59 ` Michal Hocko
2013-06-27 14:59 ` Michal Hocko
2013-06-27 15:53 ` Minchan Kim
2013-06-27 15:53 ` Minchan Kim
2013-06-27 17:42 ` Michal Hocko
2013-06-27 17:42 ` Michal Hocko
2013-06-27 15:44 ` Minchan Kim
2013-06-27 15:44 ` Minchan Kim
2013-06-27 22:02 ` Andrew Morton
2013-06-27 22:02 ` Andrew Morton
2013-06-28 0:02 ` Minchan Kim
2013-06-28 0:02 ` Minchan Kim
2013-06-28 0:34 ` Andrew Morton
2013-06-28 0:34 ` Andrew Morton
2013-06-28 0:58 ` Anton Vorontsov
2013-06-28 0:58 ` Anton Vorontsov
2013-06-28 1:13 ` Andrew Morton
2013-06-28 1:13 ` Andrew Morton
2013-06-28 4:34 ` Anton Vorontsov
2013-06-28 4:34 ` Anton Vorontsov
2013-06-28 5:07 ` Anton Vorontsov [this message]
2013-06-28 5:07 ` Anton Vorontsov
2013-06-28 14:00 ` Luiz Capitulino
2013-06-28 14:00 ` Luiz Capitulino
2013-06-28 16:57 ` Anton Vorontsov
2013-06-28 16:57 ` Anton Vorontsov
2013-06-28 17:09 ` Anton Vorontsov
2013-06-28 17:09 ` Anton Vorontsov
2013-06-28 18:25 ` Luiz Capitulino
2013-06-28 18:25 ` Luiz Capitulino
2013-06-28 18:45 ` Anton Vorontsov
2013-06-28 18:45 ` Anton Vorontsov
2013-06-28 18:58 ` Luiz Capitulino
2013-06-28 18:58 ` Luiz Capitulino
2013-06-28 18:45 ` Luiz Capitulino
2013-06-28 18:45 ` Luiz Capitulino
2013-06-28 18:55 ` Anton Vorontsov
2013-06-28 18:55 ` Anton Vorontsov
2013-06-28 19:44 ` Luiz Capitulino
2013-06-28 19:44 ` Luiz Capitulino
2013-06-29 0:56 ` Anton Vorontsov
2013-06-29 0:56 ` Anton Vorontsov
2013-07-01 8:22 ` Hyunhee Kim
2013-07-01 8:22 ` Hyunhee Kim
2013-07-02 4:32 ` Anton Vorontsov
2013-07-02 4:32 ` Anton Vorontsov
2013-07-02 8:29 ` Hyunhee Kim
2013-07-02 8:29 ` Hyunhee Kim
2013-07-02 13:29 ` Michal Hocko
2013-07-02 13:29 ` Michal Hocko
2013-07-02 14:59 ` Luiz Capitulino
2013-07-02 14:59 ` Luiz Capitulino
2013-07-02 17:24 ` Anton Vorontsov
2013-07-02 17:24 ` Anton Vorontsov
2013-07-02 18:38 ` Luiz Capitulino
2013-07-02 18:38 ` Luiz Capitulino
2013-06-28 5:24 ` Andrew Morton
2013-06-28 5:24 ` Andrew Morton
2013-06-28 13:43 ` Luiz Capitulino
2013-06-28 13:43 ` Luiz Capitulino
2013-06-28 9:04 ` Minchan Kim
2013-06-28 9:04 ` Minchan Kim
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