From: Stephen Hemminger <shemminger@linux-foundation.org>
To: Jarek Poplawski <jarkao2@gmail.com>
Cc: David Miller <davem@davemloft.net>,
Michael Breuer <mbreuer@majjas.com>,
akpm@linux-foundation.org, flyboy@gmail.com,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
Michael Chan <mchan@broadcom.com>, Don Fry <pcnet32@verizon.net>,
Francois Romieu <romieu@fr.zoreil.com>,
Matt Carlson <mcarlson@broadcom.com>
Subject: Re: [PATCH] sky2: Fix WARNING: at lib/dma-debug.c:902 check_sync
Date: Wed, 20 Jan 2010 10:03:16 -0800 [thread overview]
Message-ID: <20100120100316.2b5b1b05@nehalam> (raw)
In-Reply-To: <20100120094103.GA6225@ff.dom.local>
On Wed, 20 Jan 2010 09:41:03 +0000
Jarek Poplawski <jarkao2@gmail.com> wrote:
> [ previously: Re: [PATCH] af_packet: Don't use skb after dev_queue_xmit() ]
> On Tue, Jan 19, 2010 at 05:10:13PM -0800, Stephen Hemminger wrote:
> > On Tue, 19 Jan 2010 20:01:10 -0500
> > Michael Breuer <mbreuer@majjas.com> wrote:
> >
> > > On 1/19/2010 5:45 PM, Jarek Poplawski wrote:
> > > > On Tue, Jan 19, 2010 at 03:06:01PM -0500, Michael Breuer wrote:
> > > >
> > > >> On 1/19/2010 2:59 PM, Jarek Poplawski wrote:
> > > >>
> > > >>> On Tue, Jan 19, 2010 at 10:47:27AM -0500, Michael Breuer wrote:
> > > >>> ...
> > > >>>
> > > >>>> Still get the warning... but now 60 bytes.
> > > >>>> Jan 19 10:43:50 mail kernel: ------------[ cut here ]------------
> > > >>>> Jan 19 10:43:50 mail kernel: WARNING: at lib/dma-debug.c:902
> ...
> > > That not only compiled, but it cleared the error as well. Additionally,
> > > I used to see a bit of a delay receiving the login prompt when first
> > > connecting to the box by ssh. That delay is gone with this patch. I'd
> > > guess that the warning wasn't quite as innocuous as I thought.
> > > Note: tested on 2.6.32.4. I'll leave this up for a bit before
> > > attempting to move back to head.
> >
> > Seems like an underlying bug in the DMA api. Maybe it just can't
> > handle operations on partial mapping.
> >
> > Other drivers with same problem:
> > bnx2, cassini, pcnet32, r8169, rrunner, skge, sungem, tg3,
>
> It seems using the same length (even without pci_unmap_len()) is
> crucial here, but I hope maintainers (added to CC) will take care.
>
> Btw, it's not tested yet, but it might affect CONFIG_DMAR problems.
The list of places to inspect is:
$ git grep -l sync_single_for_cpu $(git grep -l skb_copy_from_linear_data)
drivers/infiniband/ulp/ipoib/ipoib_cm.c
drivers/message/fusion/mptlan.c
drivers/net/b44.c
drivers/net/bnx2.c
drivers/net/cassini.c
drivers/net/chelsio/sge.c
drivers/net/cxgb3/sge.c
drivers/net/irda/vlsi_ir.c
drivers/net/myri_sbus.c
drivers/net/r8169.c
drivers/net/rrunner.c
drivers/net/skge.c
drivers/net/sky2.c
drivers/net/sungem.c
drivers/net/sunhme.c
drivers/net/tg3.c
drivers/net/tokenring/3c359.c
drivers/net/tokenring/olympic.c
drivers/net/tulip/de2104x.c
drivers/net/via-velocity.c
drivers/net/wireless/ipw2x00/ipw2100.c
drivers/net/wireless/ipw2x00/ipw2200.c
next prev parent reply other threads:[~2010-01-20 18:05 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-20 9:41 [PATCH] sky2: Fix WARNING: at lib/dma-debug.c:902 check_sync Jarek Poplawski
2010-01-20 18:03 ` Stephen Hemminger [this message]
2010-01-20 20:11 ` Michael Chan
2010-01-20 20:30 ` Stephen Hemminger
2010-01-20 20:58 ` Jarek Poplawski
2010-01-20 22:50 ` David Miller
2010-01-20 22:45 ` David Miller
2010-01-20 18:09 ` Stephen Hemminger
2010-01-20 22:24 ` Alan Cox
2010-01-20 22:53 ` David Miller
2010-01-20 22:53 ` Jarek Poplawski
2010-01-21 15:22 ` FUJITA Tomonori
2010-01-21 18:41 ` Jarek Poplawski
2010-01-22 5:11 ` FUJITA Tomonori
2010-01-22 6:38 ` David Miller
2010-02-03 1:18 ` FUJITA Tomonori
2010-02-03 1:27 ` David Miller
2010-01-21 19:59 ` Michael Breuer
2010-01-21 20:41 ` Jarek Poplawski
2010-01-21 20:46 ` Michael Breuer
2010-01-21 21:02 ` Jarek Poplawski
2010-01-22 18:01 ` Hang: 2.6.32.4 sky2/DMAR (was [PATCH] sky2: Fix WARNING: at lib/dma-debug.c:902 check_sync) Michael Breuer
2010-01-22 21:53 ` Jarek Poplawski
2010-01-22 22:14 ` Michael Breuer
2010-01-22 23:06 ` Jarek Poplawski
2010-01-22 23:25 ` Michael Breuer
2010-01-22 23:46 ` Jarek Poplawski
2010-01-22 23:50 ` Michael Breuer
2010-01-23 23:21 ` Jarek Poplawski
2010-01-24 1:53 ` Michael Breuer
2010-01-27 15:34 ` Michael Breuer
2010-01-27 16:50 ` Stephen Hemminger
2010-01-27 16:57 ` Michael Breuer
2010-01-27 17:45 ` Stephen Hemminger
2010-01-27 17:57 ` Michael Breuer
2010-01-27 18:33 ` Michael Breuer
2010-01-27 23:54 ` Hang: 2.6.32.4 sky2/DMAR David Miller
2010-01-27 17:56 ` Hang: 2.6.32.4 sky2/DMAR (was [PATCH] sky2: Fix WARNING: at lib/dma-debug.c:902 check_sync) Stephen Hemminger
2010-01-27 17:58 ` Michael Breuer
2010-01-27 18:08 ` Michael Breuer
2010-01-27 18:45 ` Michael Breuer
2010-01-27 19:23 ` Jarek Poplawski
2010-01-27 19:32 ` Jarek Poplawski
2010-01-28 15:32 ` Michael Breuer
2010-01-28 16:43 ` Michael Breuer
2010-01-28 17:08 ` Stephen Hemminger
2010-01-28 18:46 ` Michael Breuer
2010-01-28 22:34 ` Jarek Poplawski
2010-01-28 22:43 ` Michael Breuer
2010-01-28 22:56 ` Jarek Poplawski
2010-01-28 22:59 ` Michael Breuer
2010-01-28 23:36 ` [PATCH] sky2: receive dma mapping error handling Stephen Hemminger
2010-01-29 0:05 ` Michael Breuer
2010-01-30 16:30 ` Michael Breuer
2010-01-30 16:31 ` Michael Breuer
2010-01-31 0:34 ` Jarek Poplawski
2010-01-31 4:17 ` Michael Breuer
2010-01-31 22:25 ` Jarek Poplawski
2010-01-31 23:58 ` Michael Breuer
2010-01-31 4:55 ` Michael Breuer
2010-01-31 18:50 ` Michael Breuer
2010-01-31 21:58 ` Michael Breuer
2010-01-31 22:18 ` Jarek Poplawski
2010-02-01 0:19 ` Michael Breuer
2010-02-01 4:26 ` Michael Breuer
2010-02-01 10:47 ` Jarek Poplawski
2010-02-01 9:17 ` [PATCH v2] sky2: Fix transmit dma mapping handling Jarek Poplawski
2010-02-01 17:52 ` Michael Breuer
2010-02-01 18:08 ` [PATCH] sky2: receive dma mapping error handling Stephen Hemminger
2010-02-01 18:20 ` Stephen Hemminger
2010-02-01 18:44 ` Michael Breuer
2010-02-01 20:13 ` Jarek Poplawski
2010-02-01 20:41 ` Jarek Poplawski
2010-02-01 21:27 ` [PATCH v3] " Jarek Poplawski
2010-02-01 22:29 ` Stephen Hemminger
2010-02-01 22:46 ` Jarek Poplawski
2010-02-01 22:51 ` Stephen Hemminger
2010-02-01 21:42 ` [PATCH v3b resent] sky2: Fix transmit dma mapping handling Jarek Poplawski
2010-02-03 4:07 ` [PATCH] sky2: receive dma mapping error handling Michael Breuer
2010-02-03 16:47 ` Michael Breuer
2010-02-03 16:56 ` Stephen Hemminger
2010-02-03 17:07 ` Michael Breuer
2010-02-03 18:23 ` Justin P. Mattock
2010-02-03 18:25 ` Stephen Hemminger
2010-02-03 18:48 ` Justin P. Mattock
2010-11-06 16:57 ` Sky2 2.6.36-09934-g2aab243 DMAR error with tcp timestamp enabled Michael Breuer
2010-11-08 3:13 ` Stephen Hemminger
2010-11-08 3:38 ` Michael Breuer
2010-11-08 16:46 ` Stephen Hemminger
2010-02-03 17:16 ` [PATCH] sky2: receive dma mapping error handling Justin P. Mattock
2010-02-02 22:44 ` Andi Kleen
2012-01-16 16:39 ` Regression: sky2 kernel between 3.1 and 3.2.1 (last known good 3.0.9) Michael Breuer
2012-01-20 14:24 ` Michael Breuer
2012-01-20 16:10 ` Stephen Hemminger
2012-01-20 16:17 ` Michael Breuer
2012-01-20 16:26 ` Stephen Hemminger
2012-01-20 16:44 ` Michael Breuer
2012-01-21 15:29 ` Michael Breuer
2012-01-22 18:03 ` Stephen Hemminger
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