linux-kernel - Re: [PATCH] quiet down swiotlb warnings

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 2 Jun 2007 18:21:46 +0300
From:	Muli Ben-Yehuda <muli@...ibm.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Rik van Riel <riel@...hat.com>,
	Andrew Vasquez <andrew.vasquez@...gic.com>,
	Christoph Hellwig <hch@...radead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] quiet down swiotlb warnings

On Fri, Jun 01, 2007 at 10:26:01PM +0200, Andi Kleen wrote:

> Normally swiotlb doesn't even try to bounce when dma mask is <=
> end_pfn so something must be very wrong in your kernel. It
> definitely isn't a mainline kernel. If this happens in Xen then Xen
> just needs fixing -- it should not try to bounce when the normal
> kernel wouldn't.

Xen needs to bounce when the requested buffer is not contiguous in
machine memory (and indeed uses swiotlb for that).

Cheers,
Muli
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/