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Date: Thu, 8 Feb 2001 16:55:29 +0100
From: Jens Axboe <axboe@suse.de>
To: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: Marcelo Tosatti <marcelo@conectiva.com.br>,
        "Stephen C. Tweedie" <sct@redhat.com>, Pavel Machek <pavel@suse.cz>,
        Linus Torvalds <torvalds@transmeta.com>,
        Manfred Spraul <manfred@colorfullife.com>,
        Ben LaHaise <bcrl@redhat.com>, Ingo Molnar <mingo@elte.hu>,
        Alan Cox <alan@lxorguk.ukuu.org.uk>, Steve Lord <lord@sgi.com>,
        Linux Kernel List <linux-kernel@vger.kernel.org>,
        kiobuf-io-devel@lists.sourceforge.net, Ingo Molnar <mingo@redhat.com>
Subject: Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait
Message-ID: <20010208165529.E3262@suse.de>
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In-Reply-To: <Pine.LNX.3.96.1010208164448.9024C-100000@artax.karlin.mff.cuni.cz>; from mikulas@artax.karlin.mff.cuni.cz on Thu, Feb 08, 2001 at 04:46:12PM +0100
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On Thu, Feb 08 2001, Mikulas Patocka wrote:
> > Even async IO (ie aio_read/aio_write) should block on the request queue if
> > its full in Linus mind.
> 
> This is not problem (you can create queue big enough to handle the load).

Well in theory, but in practice this isn't a very good idea. At some
point throwing yet more requests in there doesn't make a whole lot
of sense. You are basically _always_ going to be able to empty the request
list by dirtying lots of data.

-- 
Jens Axboe

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