linux-kernel - Re: sw-iommu leak with Ethernet jumbo frames and nfs

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Message-ID: <20081019170511.GA21266@electric-eye.fr.zoreil.com>
Date:	Sun, 19 Oct 2008 19:05:11 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	Joe Harvell <jharvell+lists.linux-kernel@...pad.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: sw-iommu leak with Ethernet jumbo frames and nfs

Joe Harvell <jharvell+lists.linux-kernel@...pad.net> :
> I noticed a problem with SW-IOMMU allocation failures when using NFS over 
> my PCI Ethernet network interface using jumbo frames.  I think it's a leak, 
> rather than under-engineered because the problem only happens when using 
> NFS and jumbo frames.  When I run netperf at a much higher data rate over 
> the NIC, I don't see any problems.  Also, I think it's a leak because the 
> problem still occurrs very quickly even when I double the SW-IOMMU heap 
[...]
> The Ethernet controller is an on-board Realtek R8110SC using driver r8169.  

This was fixed before 2.6.27 as commit a866bbf6aacf95f849810079442a20be118ce905.

Thanks for the detailled bug report.

-- 
Ueimor
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