linux-kernel - Re: AIO, DIO fsx tests failures on 2.6.19-rc1-mm1

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Date:	Mon, 16 Oct 2006 13:13:22 -0700
From:	Zach Brown <zach.brown@...cle.com>
To:	Badari Pulavarty <pbadari@...ibm.com>
CC:	lkml <linux-kernel@...r.kernel.org>, akpm@...l.org
Subject: Re: AIO, DIO fsx tests failures on 2.6.19-rc1-mm1


> Here is the easiest case to fix first :)
> simple DIO wrote more than asked for :(
> 
> elm3b29:~ # /root/fsx-linux -N 10000 -o 128000 -r 2048 -w 4096 -Z -R -W
> jnk
> mapped writes DISABLED
> truncating to largest ever: 0x32740
> truncating to largest ever: 0x39212
> truncating to largest ever: 0x3bae9
> short write: 0x17000 bytes instead of 0x14000   <<<<<<

So the answer is that -rc1-mm1 doesn't quite have the most recent
version of this patch.  Grab the final patch at the end of this post
from Andrew:

	http://lkml.org/lkml/2006/10/11/234

It fixes up a misunderstanding that came from
generic_file_buffered_write()'s habit of adding its 'written' input into
the amount of bytes it announces having written in its return value.

>From mm-commits it looks like -mm2 will have the full patch.

- z
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