linux-kernel - Re: Hang: 2.6.32.4 sky2/DMAR (was [PATCH] sky2: Fix WARNING: at lib/dma-debug.c:902 check

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Message-ID: <20100128225621.GD3109@del.dom.local>
Date:	Thu, 28 Jan 2010 23:56:21 +0100
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Michael Breuer <mbreuer@...jas.com>
Cc:	Stephen Hemminger <shemminger@...ux-foundation.org>,
	David Miller <davem@...emloft.net>, akpm@...ux-foundation.org,
	flyboy@...il.com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, Michael Chan <mchan@...adcom.com>,
	Don Fry <pcnet32@...izon.net>,
	Francois Romieu <romieu@...zoreil.com>,
	Matt Carlson <mcarlson@...adcom.com>
Subject: Re: Hang: 2.6.32.4 sky2/DMAR (was [PATCH] sky2: Fix WARNING: at
 lib/dma-debug.c:902 check_sync)

On Thu, Jan 28, 2010 at 05:43:34PM -0500, Michael Breuer wrote:
> This is with the pci_unmap_len patch as well as the dma-debug patch.
> I'm not getting any warnings - but dma-debug num-free-entries drops
> until zero and then debugging is disabled. I started with 8,000,000
> about three hours ago - without load I'm already down to less than
> half that. Again - only looking at sky2. Looks like the dma-debug
> hash table is reducing one entry for every packet, but never
> increasing the num_entries (no unmap perhaps).

OK, then, until there is some new fix you better turn it off.

Jarek P.
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