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From: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
	Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] zram: user per-cpu compression streams
Date: Mon, 2 May 2016 18:21:57 +0900	[thread overview]
Message-ID: <20160502092157.GA21764@swordfish> (raw)
In-Reply-To: <20160502082822.GC6077@bbox>

On (05/02/16 17:28), Minchan Kim wrote:
[..]
> > aha... I misunderstood you. I thought you talked about the test results
> > in particular, not about zram stats in general. hm, given that we don't
> > close the door for 'idle compression streams list' yet, and may revert
> > per-cpu streams, may be we can introduce this stat in 4.8? otherwise, in
> > the worst case, we will have to trim a user visible stat file once again
> > IF we, for some reason, will decide to return idle list back (hopefully
> > we will not). does it sound OK to you to not touch the stat file now?
> 
> My concern is how we can capture such regression without introducing
> the stat of recompression? Do you have an idea? :)

...hm...  inc ->failed_writes?

... or as a dirty and ugly and illegal (read "undocumented") hack, we
probably can use ->failed_reads for that purpose. simply because I don't
think any one has ever seen ->failed_reads != 0.

	-ss

  reply	other threads:[~2016-05-02  9:20 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-28 16:17 [PATCH 0/2] zram: switch to per-cpu compression streams Sergey Senozhatsky
2016-04-28 16:17 ` [PATCH 1/2] zsmalloc: require GFP in zs_malloc() Sergey Senozhatsky
2016-04-29  5:44   ` Minchan Kim
2016-04-29  7:30     ` Sergey Senozhatsky
2016-04-28 16:17 ` [PATCH 2/2] zram: user per-cpu compression streams Sergey Senozhatsky
2016-05-02  6:23   ` Minchan Kim
2016-05-02  7:25     ` Sergey Senozhatsky
2016-05-02  8:06       ` Sergey Senozhatsky
2016-05-03  5:23         ` Minchan Kim
2016-05-03  5:40           ` Minchan Kim
2016-05-03  5:57             ` Sergey Senozhatsky
2016-05-03  6:19               ` Minchan Kim
2016-05-03  7:01                 ` Sergey Senozhatsky
2016-05-03  5:44           ` Sergey Senozhatsky
2016-05-02  8:28       ` Minchan Kim
2016-05-02  9:21         ` Sergey Senozhatsky [this message]
2016-05-03  1:40           ` Minchan Kim
2016-05-03  1:53             ` Sergey Senozhatsky
2016-05-03  2:20               ` Minchan Kim
2016-05-03  2:30                 ` Sergey Senozhatsky
2016-05-03  4:29                   ` Sergey Senozhatsky
2016-05-03  5:03                     ` Minchan Kim
2016-05-03  6:53                       ` Sergey Senozhatsky

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