linux-kernel - Re: [PATCH v7u1 26/31] x86: Don't enable swiotlb if there is not enough ram for it

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Date:	Thu, 24 Jan 2013 09:51:02 -0700
From:	Shuah Khan <shuahkhan@...il.com>
To:	Konrad Rzeszutek Wilk <konrad@...nel.org>
Cc:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Yinghai Lu <yinghai@...nel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Borislav Petkov <bp@...en8.de>, Jan Kiszka <jan.kiszka@....de>,
	Jason Wessel <jason.wessel@...driver.com>,
	linux-kernel@...r.kernel.org, Joerg Roedel <joro@...tes.org>
Subject: Re: [PATCH v7u1 26/31] x86: Don't enable swiotlb if there is not
 enough ram for it

On Thu, Jan 24, 2013 at 8:39 AM, Konrad Rzeszutek Wilk
<konrad@...nel.org> wrote:
> On Fri, Jan 18, 2013 at 10:55:35AM -0500, Konrad Rzeszutek Wilk wrote:
>> On Mon, Jan 14, 2013 at 10:19:22PM -0800, Yinghai Lu wrote:
>> > On Fri, Jan 11, 2013 at 9:49 AM, Yinghai Lu <yinghai@...nel.org> wrote:
>> > > On Fri, Jan 11, 2013 at 8:52 AM, Yinghai Lu <yinghai@...nel.org> wrote:
>> > >>>
>> > >>> I need to check this patch out and then also test-run them on IA64, AMD-VI, Calgary-X
>> > >>> GART and Intel VT-d to make a sanity test.
>> > >>
>> > >> that will be great, and please check attached two patches, or you want
>> > >> to me update
>> > >> for-x86-boot branch and you test that instead?
>> > >>
>> > >> but if you want to check memmap=4095M$1M, then will need to test on
>> > >> newer branch.
>> > >
>> > >
>> > > I updated the for-x86-boot branch.
>> > >
>> > > git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
>> > > for-x86-boot
>> > >
>> >
>> > Konrad,
>> >
>> > Did you get chance to test that branch on your setups?
>>
>> I tested it on the IA64 box - it worked without any hiccups. Going to
>> try the Calgary-X and the rest of the machines over the weekend.
>
> Worked without issues on AMD GART, AMD Vi, Intel VT-d, and on boxes
> without any IOMMU.
>
> I am having trouble getting my Calgary-X box to power on, so that
> testing is taking a bit longer.
>

I still have the AMD system I tested earlier versions of this work. I
started compiles with these patches on 3.7 and will let you know the
status.

-- Shuah
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