netdev - Re: [PATCH] NET_DMA: remove unused dma_memcpy_to_kernel

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Date:	Mon, 30 Jul 2007 19:14:51 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	pravin <pravin.shelar@...il.com>
Cc:	David Miller <davem@...emloft.net>, shannon.nelson@...el.com,
	netdev@...r.kernel.org, viro@....linux.org.uk,
	christopher.leech@...el.com, andy.grover@...il.com
Subject: Re: [PATCH] NET_DMA: remove unused dma_memcpy_to_kernel_iovec

On Mon, Jul 30, 2007 at 08:09:53PM +0530, pravin wrote:
> comments?

please avoid using plain sendmsg/recvmsg from kernelspace.  Adding these
segment checks is more than a bad hack and not something that should
clutter up fasthpathes.  Add to that problems with kthreads vs blocking
recvmsg and you have a bigger mess than you can handle.

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