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: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CADDKRnB1=-zj8apQ3vBfbxVZ8Dc4DJbD1MHynC9azNpfaZeF6Q@mail.gmail.com>
2016-10-04 13:26 ` Problem with VMAP_STACK=y 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
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