linux-kernel - splice blocks indefinitely when len

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Message-Id: <1162226390.7280.18.camel@systems03.lan.brontes3d.com>
Date:	Mon, 30 Oct 2006 11:39:50 -0500
From:	Daniel Drake <ddrake@...ntes3d.com>
To:	axboe@...e.de
Cc:	linux-kernel@...r.kernel.org
Subject: splice blocks indefinitely when len > 64k?

Hi,

I'm experimenting with splice and have run into some unusual behaviour.

I am using the utilities in git://brick.kernel.dk/data/git/splice.git

In splice.h, when changing SPLICE_SIZE from:

#define SPLICE_SIZE (64*1024)

to

#define SPLICE_SIZE ((64*1024)+1)

splice-cp hangs indefinitely when copying files sized 65537 bytes or
more. It hangs on the first splice() call.

Is this a bug? I'd like to be able to copy much more than 64kb on a
single splice call.

Thanks!
Daniel

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