From: Stephen Hemminger <shemminger@osdl.org>
To: linux-kernel@vger.kernel.org
Subject: Re: Zero copy between ISR, kernel and User
Date: Wed, 27 Sep 2006 12:10:30 -0700 [thread overview]
Message-ID: <20060927121030.4469ec6e@freekitty> (raw)
In-Reply-To: 4519F7A9.4050807@saville.com
On Tue, 26 Sep 2006 21:01:45 -0700
Wink Saville <wink@saville.com> wrote:
> Hello,
>
> I would like to allow the transferring of data between ISR's, kernel and
> user code, without requiring copying. I envision allocating buffers in
> the kernel and then mapping them so that they appear at the same
> addresses to all code, and never being swapped out of memory.
>
> Is this feasible for all supported Linux architectures and is there
> existing code that someone could point me towards?
>
> Regards,
>
> Wink Saville
>
Your better off having application mmap a device, then transfer
the data to there. Something like AF_PACKET.
--
Stephen Hemminger <shemminger@osdl.org>
next prev parent reply other threads:[~2006-09-27 19:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-27 4:01 Zero copy between ISR, kernel and User Wink Saville
2006-09-27 19:10 ` Stephen Hemminger [this message]
2006-09-28 14:45 ` Wink Saville
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