linux-kernel - Re: Zero copy between ISR, kernel and User

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]

Message-ID: <20060927121030.4469ec6e@freekitty>
Date:	Wed, 27 Sep 2006 12:10:30 -0700
From:	Stephen Hemminger <shemminger@...l.org>
To:	linux-kernel@...r.kernel.org
Subject: Re: Zero copy between ISR, kernel and User

On Tue, 26 Sep 2006 21:01:45 -0700
Wink Saville <wink@...ille.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@...l.org>
-
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/