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:	Fri, 11 Jan 2013 08:52:02 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Shuah Khan <shuahkhan@...il.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 Fri, Jan 11, 2013 at 8:35 AM, Konrad Rzeszutek Wilk
<konrad.wilk@...cle.com> wrote:
> On Thu, Jan 10, 2013 at 03:07:10PM -0800, Yinghai Lu wrote:
>
> I'm the frontline maintainer of swiotlb and related stuff so if you want to follow
> the proper protocol you should wait until I give you my Ack.

Sure.

>
> 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.

>
> However, this particular patch can go outside the mega-patchset you have. So you
> could post the mega-patchset to hpa without this being in it and just mention
> that there is this extra one that Konrad is handling.

Just want to put them together, so in case backporting guys could find
them easier.

Thanks

Yinghai

Download attachment "alloc_low_page_nopanic.patch" of type "application/octet-stream" (2534 bytes)

Download attachment "swiotlb.patch" of type "application/octet-stream" (6465 bytes)