From: Jens Axboe <axboe@suse.de>
To: Andi Kleen <ak@muc.de>
Cc: "David S. Miller" <davem@redhat.com>, linux-kernel@vger.kernel.org
Subject: Re: block layer sg, bsg
Date: Wed, 4 Aug 2004 19:31:11 +0200 [thread overview]
Message-ID: <20040804173111.GB5978@suse.de> (raw)
In-Reply-To: <m33c32ke3f.fsf@averell.firstfloor.org>
On Wed, Aug 04 2004, Andi Kleen wrote:
> "David S. Miller" <davem@redhat.com> writes:
> >
> > Or use a more portable well-defined type which does not change
> > size nor layout between 32-bit and 64-bit environments.
>
> That is usually a mistake. People get the more subtle issues
> like long long handling wrong, and then it is impossible to fix it
> anymore in a compat layer (examples are ipsec and iptables, which
> cannot be emulated on x86-64 because of that)
>
> So please never pass any structures with read/write/netlink.
Which basically brings us back to SG_IO, or (alternatively) SG_IO_WRITE
and SG_IO_READ ioctls. I doubt that is really worth it, however. There's
just not a huge need to do it.
--
Jens Axboe
next prev parent reply other threads:[~2004-08-04 17:31 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <2ppN4-1wi-11@gated-at.bofh.it>
[not found] ` <2pvps-5xO-33@gated-at.bofh.it>
[not found] ` <2pvz2-5Lf-19@gated-at.bofh.it>
[not found] ` <2pwbQ-68b-43@gated-at.bofh.it>
2004-08-04 17:28 ` block layer sg, bsg Andi Kleen
2004-08-04 17:31 ` Jens Axboe [this message]
2004-08-04 19:18 ` Jeff Garzik
2004-08-04 19:22 ` David S. Miller
2004-08-04 23:21 ` Andi Kleen
2004-08-04 23:26 ` David S. Miller
2004-08-04 23:51 ` YOSHIFUJI Hideaki / 吉藤英明
2004-08-05 3:58 ` David S. Miller
2004-08-06 7:03 ` Daniel Phillips
2004-08-06 15:04 ` Andi Kleen
2004-08-08 19:18 ` Daniel Phillips
2004-08-05 11:49 ` Andi Kleen
2004-08-06 3:46 ` YOSHIFUJI Hideaki / 吉藤英明
2004-08-06 4:19 ` David S. Miller
2004-08-06 13:20 ` Andi Kleen
2004-08-06 18:28 ` David S. Miller
2004-08-06 11:04 ` Andi Kleen
2004-08-04 8:50 Jens Axboe
2004-08-04 14:52 ` David S. Miller
2004-08-04 15:04 ` Jens Axboe
2004-08-04 15:44 ` David S. Miller
2004-08-04 15:48 ` Jens Axboe
2004-08-04 15:56 ` Jeff Garzik
2004-08-04 15:58 ` Jens Axboe
2004-08-04 23:11 ` Douglas Gilbert
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