From: Linus Walleij <linus.walleij@linaro.org>
To: Pavel Machek <pavel@ucw.cz>
Cc: Adrian Hunter <adrian.hunter@intel.com>,
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
linux-mm@kvack.org
Subject: Re: 4.14-rc2 on thinkpad x220: out of memory when inserting mmc card
Date: Mon, 2 Oct 2017 14:06:03 +0200 [thread overview]
Message-ID: <CACRpkdbatrt0Uxf8653iiV-OKkgcc0Ziog_L4oDVTJVNqtNN0Q@mail.gmail.com> (raw)
In-Reply-To: <20171002084131.GA24414@amd>
On Mon, Oct 2, 2017 at 10:41 AM, Pavel Machek <pavel@ucw.cz> wrote:
>> Bounce buffers are being removed from v4.15
As Adrian states, this would make any last bugs go away. I would
even consider putting this patch this into fixes if it solves the problem.
> although you may experience
>> performance regression with that:
>>
>> https://marc.info/?l=linux-mmc&m=150589778700551
>
> Hmm. The performance of this is already pretty bad, I really hope it
> does not get any worse.
Did you use bounce buffers? Those were improving performance on
some laptops with TI or Ricoh host controllers and nothing else was
ever really using it (as can be seen from the commit).
Yours,
Linus Walleij
WARNING: multiple messages have this Message-ID (diff)
From: Linus Walleij <linus.walleij@linaro.org>
To: Pavel Machek <pavel@ucw.cz>
Cc: Adrian Hunter <adrian.hunter@intel.com>,
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
linux-mm@kvack.org
Subject: Re: 4.14-rc2 on thinkpad x220: out of memory when inserting mmc card
Date: Mon, 2 Oct 2017 14:06:03 +0200 [thread overview]
Message-ID: <CACRpkdbatrt0Uxf8653iiV-OKkgcc0Ziog_L4oDVTJVNqtNN0Q@mail.gmail.com> (raw)
In-Reply-To: <20171002084131.GA24414@amd>
On Mon, Oct 2, 2017 at 10:41 AM, Pavel Machek <pavel@ucw.cz> wrote:
>> Bounce buffers are being removed from v4.15
As Adrian states, this would make any last bugs go away. I would
even consider putting this patch this into fixes if it solves the problem.
> although you may experience
>> performance regression with that:
>>
>> https://marc.info/?l=linux-mmc&m=150589778700551
>
> Hmm. The performance of this is already pretty bad, I really hope it
> does not get any worse.
Did you use bounce buffers? Those were improving performance on
some laptops with TI or Ricoh host controllers and nothing else was
ever really using it (as can be seen from the commit).
Yours,
Linus Walleij
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next prev parent reply other threads:[~2017-10-02 12:06 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-05 19:47 4.13 on thinkpad x220: oops when writing to SD card Pavel Machek
2017-09-06 2:44 ` Shawn Lin
2017-09-06 6:03 ` Adrian Hunter
2017-09-07 7:18 ` Ulf Hansson
2017-09-07 7:53 ` Adrian Hunter
2017-09-07 10:47 ` Seraphime Kirkovski
2017-09-07 12:06 ` Ulf Hansson
2017-09-07 12:55 ` Pavel Machek
2017-09-07 15:03 ` Ulf Hansson
2017-09-08 8:51 ` Pavel Machek
2017-09-07 19:58 ` Linus Walleij
2017-09-07 20:02 ` Linus Walleij
2017-09-08 2:51 ` Shawn Lin
2017-09-12 9:42 ` Linus Walleij
2017-09-13 4:04 ` Shawn Lin
2017-10-01 9:37 ` 4.14-rc2 on thinkpad x220: out of memory when inserting mmc card Pavel Machek
2017-10-01 10:26 ` Pavel Machek
2017-10-01 10:57 ` Tetsuo Handa
2017-10-01 10:57 ` Tetsuo Handa
2017-10-02 7:52 ` Adrian Hunter
2017-10-02 7:52 ` Adrian Hunter
2017-10-02 8:41 ` Pavel Machek
2017-10-02 12:06 ` Linus Walleij [this message]
2017-10-02 12:06 ` Linus Walleij
2017-10-02 13:03 ` Pavel Machek
2017-10-03 6:27 ` Adrian Hunter
2017-10-03 6:27 ` Adrian Hunter
2017-10-23 9:31 ` Pavel Machek
2017-10-23 12:13 ` Adrian Hunter
2017-10-23 12:13 ` Adrian Hunter
2017-10-23 12:16 ` Linus Walleij
2017-10-23 12:16 ` Linus Walleij
2017-10-23 21:27 ` Pavel Machek
2017-10-24 6:59 ` Adrian Hunter
2017-10-24 6:59 ` Adrian Hunter
2017-10-26 13:44 ` Linus Walleij
2017-10-26 13:44 ` Linus Walleij
2017-10-02 14:09 ` Linus Walleij
2017-10-02 14:09 ` Linus Walleij
2017-10-03 6:30 ` Adrian Hunter
2017-10-03 6:30 ` Adrian Hunter
2017-10-04 7:53 ` Linus Walleij
2017-10-04 7:53 ` Linus Walleij
2017-10-04 8:01 ` Ulf Hansson
2017-10-04 8:01 ` Ulf Hansson
2017-10-02 14:44 ` Michal Hocko
2017-10-02 14:44 ` Michal Hocko
2017-10-02 14:55 ` Tetsuo Handa
2017-10-02 14:55 ` Tetsuo Handa
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