To: Chris Wright <chrisw@osdl.org>
Cc: viro@parcelfarce.linux.theplanet.co.uk, discuss@x86-64.org,
       linux-kernel@vger.kernel.org
Subject: Re: f_ops flag to speed up compatible ioctls in linux kernel
References: <20040901072245.GF13749@mellanox.co.il>
	<20040901073218.GQ16297@parcelfarce.linux.theplanet.co.uk>
	<52zn4a0ysg.fsf@topspin.com> <20040901110225.D1973@build.pdx.osdl.net>
From: Roland Dreier <roland@topspin.com>
Date: Wed, 01 Sep 2004 11:12:46 -0700
In-Reply-To: <20040901110225.D1973@build.pdx.osdl.net> (Chris Wright's
 message of "Wed, 1 Sep 2004 11:02:25 -0700")
Message-ID: <52656x26zl.fsf@topspin.com>
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    Chris> You forgot a driver specific filesystem which exposes
    Chris> requests in a file per request type style.  Also, there's a
    Chris> simple_transaction type of file which can allow you
    Chris> send/recv data and should eliminate the need for tagging.
    Chris> Example, look at nfsd fs (fs/nfsd/nfsctl.c).

Thanks, I'll take a look at this.  How does one handle the 32-bit
userspace / 64-bit kernel compat layer in this setup?

 - R.

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