From: Andi Kleen <andi@firstfloor.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
x86@kernel.org
Subject: Re: [PATCH] x86: enable DMA CMA with swiotlb
Date: Fri, 22 Nov 2013 13:19:04 -0800 [thread overview]
Message-ID: <87fvqow2wn.fsf@tassilo.jf.intel.com> (raw)
In-Reply-To: <528F71F8.4070902@zytor.com> (H. Peter Anvin's message of "Fri, 22 Nov 2013 07:02:16 -0800")
"H. Peter Anvin" <hpa@zytor.com> writes:
>
> If you have a real iotlb, why would you need contiguous memory?
iotlb is often slow.
Another use case is allocating 1GB pages at runtime.
-Andi
--
ak@linux.intel.com -- Speaking for myself only
next prev parent reply other threads:[~2013-11-22 21:19 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-19 23:32 [PATCH] x86: enable DMA CMA with swiotlb Akinobu Mita
2013-11-20 14:00 ` Konrad Rzeszutek Wilk
2013-11-20 23:35 ` Akinobu Mita
2013-11-20 23:47 ` H. Peter Anvin
2013-11-21 15:02 ` Akinobu Mita
2013-11-21 18:11 ` H. Peter Anvin
2013-11-22 12:27 ` Akinobu Mita
2013-11-22 15:02 ` H. Peter Anvin
2013-11-22 21:19 ` Andi Kleen [this message]
2013-11-23 13:59 ` Akinobu Mita
2013-11-22 9:15 ` Marek Szyprowski
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