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Message-ID: <471F0F44.4010102@garzik.org>
Date: Wed, 24 Oct 2007 05:24:20 -0400
From: Jeff Garzik <jeff@...zik.org>
To: Andi Kleen <ak@...e.de>
CC: linux-kernel@...r.kernel.org, akpm@...l.org,
shannon.nelson@...el.com, anil.s.keshavamurthy@...el.com
Subject: Re: [PATCH] Remove bogus default y for DMAR and NET_DMA
Andi Kleen wrote:
> Index: linux-2.6.24-rc1-hack/arch/x86_64/Kconfig
> ===================================================================
> --- linux-2.6.24-rc1-hack.orig/arch/x86_64/Kconfig
> +++ linux-2.6.24-rc1-hack/arch/x86_64/Kconfig
> @@ -753,7 +753,6 @@ config PCI_DOMAINS
> config DMAR
> bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
> depends on PCI_MSI && ACPI && EXPERIMENTAL
> - default y
> help
> DMA remapping (DMAR) devices support enables independent address
> translations for Direct Memory Access (DMA) from devices.
ACK
> Index: linux-2.6.24-rc1-hack/drivers/dma/Kconfig
> ===================================================================
> --- linux-2.6.24-rc1-hack.orig/drivers/dma/Kconfig
> +++ linux-2.6.24-rc1-hack/drivers/dma/Kconfig
> @@ -43,7 +43,6 @@ comment "DMA Clients"
> config NET_DMA
> bool "Network: TCP receive copy offload"
> depends on DMA_ENGINE && NET
> - default y
> help
> This enables the use of DMA engines in the network stack to
> offload receive copy-to-user operations, freeing CPU cycles.
ACK -- but its arguable that given the current code, its worth setting
this if DMA_ENGINE is also set.
-
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