From: Pavel Machek <pavel@ucw.cz>
To: Linus Walleij <linus.walleij@linaro.org>
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, 23 Oct 2017 23:27:41 +0200 [thread overview]
Message-ID: <20171023212741.GA12782@amd> (raw)
In-Reply-To: <CACRpkdaa6qq91+dQ43EZDvDefbM3tjwLX5e+nNZouwXM0xJ=4w@mail.gmail.com>
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On Mon 2017-10-23 14:16:40, Linus Walleij wrote:
> On Mon, Oct 23, 2017 at 11:31 AM, Pavel Machek <pavel@ucw.cz> wrote:
>
> >> > Thinkpad X220... how do I tell if I was using them? I believe so,
> >> > because I uncovered bug in them before.
> >>
> >> You are certainly using bounce buffers. What does lspci -knn show?
> >
> > Here is the output:
> > 0d:00.0 System peripheral [0880]: Ricoh Co Ltd PCIe SDXC/MMC Host Controller [1180:e823] (rev 07)
> > Subsystem: Lenovo Device [17aa:21da]
> > Kernel driver in use: sdhci-pci
>
> So that is a Ricoh driver, one of the few that was supposed to benefit
> from bounce buffers.
>
> Except that if you actually turned it on:
> > [10994.302196] kworker/2:1: page allocation failure: order:4,
> so it doesn't have enough memory to use these bounce buffers
> anyway.
Well, look at archives: driver failed completely when allocation failed.
> I'm now feel it was the right thing to delete them.
Which means I may have been geting benefit -- when it worked. I
believe solution is to allocate at driver probing time.
(OTOH ... SPI is slow compared to rest of the system, right? Where
does the benefit come from?)
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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next prev parent reply other threads:[~2017-10-23 21:27 UTC|newest]
Thread overview: 35+ 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
2017-10-02 7:52 ` Adrian Hunter
2017-10-02 8:41 ` Pavel Machek
2017-10-02 12:06 ` Linus Walleij
2017-10-02 13:03 ` Pavel Machek
2017-10-03 6:27 ` Adrian Hunter
2017-10-23 9:31 ` Pavel Machek
2017-10-23 12:13 ` Adrian Hunter
2017-10-23 12:16 ` Linus Walleij
2017-10-23 21:27 ` Pavel Machek [this message]
2017-10-24 6:59 ` Adrian Hunter
2017-10-26 13:44 ` Linus Walleij
2017-10-02 14:09 ` Linus Walleij
2017-10-03 6:30 ` Adrian Hunter
2017-10-04 7:53 ` Linus Walleij
2017-10-04 8:01 ` Ulf Hansson
2017-10-02 14:44 ` Michal Hocko
2017-10-02 14:55 ` Tetsuo Handa
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