From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
To: Jiri Kosina <jikos@kernel.org>
Cc: "Jörg Otte" <jrg.otte@gmail.com>,
"Johannes Stezenbach" <js@linuxtv.org>,
"Patrick Boettcher" <patrick.boettcher@posteo.de>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
"Andy Lutomirski" <luto@kernel.org>,
"Michael Krufky" <mkrufky@linuxtv.org>,
"Mauro Carvalho Chehab" <mchehab@kernel.org>,
"Linux Media Mailing List" <linux-media@vger.kernel.org>
Subject: Re: Problem with VMAP_STACK=y
Date: Fri, 7 Oct 2016 08:11:36 -0300 [thread overview]
Message-ID: <20161007081136.1eb8fae9@vento.lan> (raw)
In-Reply-To: <alpine.LNX.2.00.1610070952010.31629@cbobk.fhfr.pm>
Em Fri, 7 Oct 2016 09:52:56 +0200 (CEST)
Jiri Kosina <jikos@kernel.org> escreveu:
> On Thu, 6 Oct 2016, Mauro Carvalho Chehab wrote:
>
> > I can't see any other obvious error on the conversion. You could try to
> > enable debug options at DVB core/dvb-usb and/or add some printk's to the
> > driver and see what's happening.
>
> Mauro, also please don't forget that there are many more places in
> drivers/media that still perform DMA on stack, and so have to be fixed for
> 4.9 (as VMAP_STACK makes that to be immediately visible problem even on
> x86_64, which it wasn't the case before).
Yes, I'm aware of that. I'm doing the conversion of drivers under dvb-usb,
at:
https://git.linuxtv.org/mchehab/experimental.git/log/?h=media_dmastack_fixes
I'll be sending the patches to the ML after ready.
I'll then take a look on other USB drivers that use the stack. I guess
the non-USB media drivers are safe from this issue.
Thanks,
Mauro
next prev parent reply other threads:[~2016-10-07 11:11 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-04 12:27 Problem with VMAP_STACK=y Jörg Otte
2016-10-04 13:26 ` Jiri Kosina
2016-10-04 16:11 ` Jörg Otte
2016-10-05 7:26 ` Jiri Kosina
2016-10-05 7:34 ` Patrick Boettcher
2016-10-05 7:50 ` Jiri Kosina
2016-10-05 9:04 ` Mauro Carvalho Chehab
2016-10-05 11:21 ` Mauro Carvalho Chehab
2016-10-05 15:21 ` Jörg Otte
2016-10-05 15:53 ` Andy Lutomirski
2016-10-05 16:45 ` Jörg Otte
2016-10-05 16:55 ` Andy Lutomirski
2016-10-05 18:29 ` Johannes Stezenbach
2016-10-05 18:55 ` Mauro Carvalho Chehab
2016-10-06 8:30 ` Jörg Otte
2016-10-06 17:17 ` Mauro Carvalho Chehab
2016-10-07 7:52 ` Jiri Kosina
2016-10-07 11:11 ` Mauro Carvalho Chehab [this message]
2016-10-05 7:40 ` dvb-usb stack-memory used for URB-buffers (was: Re: Problem with VMAP_STACK=y) Patrick Boettcher
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20161007081136.1eb8fae9@vento.lan \
--to=mchehab@s-opensource.com \
--cc=jikos@kernel.org \
--cc=jrg.otte@gmail.com \
--cc=js@linuxtv.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=luto@kernel.org \
--cc=mchehab@kernel.org \
--cc=mkrufky@linuxtv.org \
--cc=patrick.boettcher@posteo.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.