From: Michael Breuer <mbreuer@majjas.com>
To: Jarek Poplawski <jarkao2@gmail.com>
Cc: Stephen Hemminger <shemminger@linux-foundation.org>,
David Miller <davem@davemloft.net>,
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: receive dma mapping error handling
Date: Sun, 31 Jan 2010 23:26:03 -0500 [thread overview]
Message-ID: <4B6657DB.3010008@majjas.com> (raw)
In-Reply-To: <4B661E22.8090907@majjas.com>
On 1/31/2010 7:19 PM, Michael Breuer wrote:
> On 1/31/2010 5:18 PM, Jarek Poplawski wrote:
> solves the dma-debug issue - i.e., elements are now being unmapped.
>
> Will leave up and hit with traffic unless a crash occurs. If I hit
> something unrelated I'll backport to 2.6.32.7 and try that for a
> while. I do think it's plausible that the dma errors after (during)
> load were due to hardware limitations on the number of mapped entries
> (haven't researched what that limit was). I would also assume that the
> sw map would also have failed eventually.
>
> I'd suggest that regardless of whether this patch solves my crash that
> it ought to be backported as it seems unlikely that any machine would
> be able to survive for long without the tx entries being unmapped.
>
FYI - tried generating lots of extra tx traffic... found a way to
generate the rx status messages on demand:
ping -i .0000001 -s 8000 -t 2 <host> >/dev/null
Yields:
Jan 31 23:08:07 mail kernel: sky2 eth0: rx error, status 0x1f6a0010
length 1518
Jan 31 23:08:07 mail kernel: sky2 eth0: rx error, status 0x1f6a0010
length 1518
Jan 31 23:08:07 mail kernel: sky2 eth0: rx error, status 0x1f6a0010
length 1518
Jan 31 23:08:07 mail kernel: sky2 eth0: rx error, status 0x1f6a0010
length 1518
Jan 31 23:08:07 mail kernel: sky2 eth0: rx error, status 0x1f6a0010
length 1518
Jan 31 23:08:07 mail kernel: sky2 eth0: rx error, status 0x1f6a0010
length 1518
Jan 31 23:08:07 mail kernel: sky2 eth0: rx error, status 0x1f6a0010
length 1518
Jan 31 23:08:07 mail kernel: sky2 eth0: rx error, status 0x1f6a0010
length 1518
Jan 31 23:08:07 mail kernel: sky2 eth0: rx error, status 0x1f6a0010
length 1518
Jan 31 23:08:07 mail kernel: sky2 eth0: rx error, status 0x1f6a0010
length 1518
Jan 31 23:08:12 mail kernel: net_ratelimit: 316 callbacks suppressed
etc.
Looking at the packet trace, it seems that my Windows7 box is under
*some* circumstances not observing the MTU. In this case, the ICMP reply
is going back with the 8000 byte jumbo frame unfragmented. It seems that
the reverse is also true. I don't know why sometimes win7 does this, and
at other times properly fragments.
Oddly, prior to this attempt if I set no fragment on a ping from the
windows box back to the linux box and a size of > mtu (like 8000), the
ping failed. Absent the no-fragment flag, the ping properly fragmented.
I am not sure why Windows now thinks the MTU is > 1500. I'll look into
that when I have some time. It's possible that with 2.6.33-rc5 & the
patches I've got that somehow path mtu discovery is broken as nothing
changed on the windows side.
Understanding that the other side is out of spec, I'd still wonder why
the sky2 driver generates rx errors. Perhaps overruns should be tossed
silently... by the hardware if possible.
next prev parent reply other threads:[~2010-02-01 4:26 UTC|newest]
Thread overview: 95+ 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
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 [this message]
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
2010-02-03 17:16 ` 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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