linux-kernel - Re: splice blocks indefinitely when len

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Message-ID: <45464E67.7030004@cfl.rr.com>
Date:	Mon, 30 Oct 2006 14:11:35 -0500
From:	Phillip Susi <psusi@....rr.com>
To:	Daniel Drake <ddrake@...ntes3d.com>
CC:	axboe@...e.de, linux-kernel@...r.kernel.org
Subject: Re: splice blocks indefinitely when len > 64k?

While it should not simply hang, the splice size needs to be an even 
multiple of the page size.

Daniel Drake wrote:
> 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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