netdev - Re: Reproducible data corruption with sendfile+vsftp

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Message-ID: <475AB802.1090003@rtr.ca>
Date:	Sat, 08 Dec 2007 10:28:02 -0500
From:	Mark Lord <lkml@....ca>
To:	Francois Romieu <romieu@...zoreil.com>
Cc:	Holger Hoffstaette <holger@...ards.de>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	torvalds@...ux-foundation.org
Subject: Re: Reproducible data corruption with sendfile+vsftp - splice	regression?

Francois Romieu wrote:
> Holger Hoffstaette <holger@...ards.de> :
> [...]
>> Maybe turning off sendfile or NAPI just lead to random success - so far it
>> really looks like tso on the r8169 is the common cause.
> 
> TSO on the r8169 is the magic switch but the regression makes imvho more
> sense from a VM pov:
> 
> - the corrupted file has the same size as the expected file
> - the corrupted file exhibits holes which come as a multiple of 4096 bytes
>   (8*4k, 2 places, there may be more)
...

That's interesting.  I had the those exact same symptoms here
with copying data to/from a USB stick recently.
But that stick died completely shortly thereafter,
so this was written-off as "bad hardware".

Strange that you see the same symptoms from a different scenario.
Probably no relationship there, but ..

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