linux-kernel - RE: [E1000-devel] [PATCH 1/3] ixgbe, ixgbevf: Add new mbox API to enable MC promiscuous mode

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Date:	Fri, 13 Feb 2015 04:44:39 +0000
From:	Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>
To:	"Skidmore, Donald C" <donald.c.skidmore@...el.com>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>
CC:	Alexander Duyck <alexander.duyck@...il.com>,
	Bjørn Mork <bjorn@...k.no>,
	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"Choi, Sy Jong" <sy.jong.choi@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	David Laight <David.Laight@...LAB.COM>,
	Hayato Momma <h-momma@...jp.nec.com>
Subject: RE: [E1000-devel] [PATCH 1/3] ixgbe, ixgbevf: Add new mbox API to
 enable MC promiscuous mode

> > > -----Original Message-----
> > > From: Hiroshi Shimamoto [mailto:h-shimamoto@...jp.nec.com]
> > > Sent: Monday, February 09, 2015 6:29 PM
> > > To: Kirsher, Jeffrey T
> > > Cc: Alexander Duyck; Skidmore, Donald C; Bjørn Mork; e1000-
> > > devel@...ts.sourceforge.net; netdev@...r.kernel.org; Choi, Sy Jong; linux-
> > > kernel@...r.kernel.org; David Laight; Hayato Momma
> > > Subject: RE: [E1000-devel] [PATCH 1/3] ixgbe, ixgbevf: Add new mbox API to
> > > enable MC promiscuous mode
> > >
> > > > > > > Can you please fix up your patches based on my tree:
> > > > > > > git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/queue.git
> > > > > >
> > > > > > Yes. I haven't noticed your tree.
> > > > > > Will resend patches against it.
> > > > > >
> > > > >
> > > > > I encountered an issue with your tree, the commit id is below.
> > > > >
> > > > > $ git log | head
> > > > > commit e6f1649780f8f5a87299bf6af04453f93d1e3d5e
> > > > > Author: Rasmus Villemoes <linux@...musvillemoes.dk>
> > > > > Date:   Fri Jan 23 20:43:14 2015 -0800
> > > > >
> > > > >     ethernet: fm10k: Actually drop 4 bits
> > > > >
> > > > >     The comment explains the intention, but vid has type u16. Before the
> > > > >     inner shift, it is promoted to int, which has plenty of space for all
> > > > >     vid's bits, so nothing is dropped. Use a simple mask instead.
> > > > >
> > > > >
> > > > > I use the kernel from your tree in both host and guest.
> > > > >
> > > > > Assign an IPv6 for VF in guest.
> > > > > # ip -6 addr add 2001:db8::18:1/64 dev ens0
> > > > >
> > > > > Send ping packet from other server to the VM.
> > > > > # ping6  2001:db8::18:1 -I eth0
> > > > >
> > > > > The following message was shown.
> > > > > ixgbevf 0000:00:08.0: partial checksum but l4 proto=3a!
> > > > >
> > > > > If I did the same operation in the host, I saw the same error message in
> > > host too.
> > > > > ixgbe 0000:2d:00.0: partial checksum but l4 proto=3a!
> > > > >
> > > > > Do you have any idea about that?
> > > >
> > > > Ah, sorry about that, try this tree again:
> > > > git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/queue.git
> > > >
> > > > That patch was dropped for favor of a patch that Matthew Vick put
> > > > together (and recently got pushed upstream).  So my queue no longer
> > > > has that patch in the queue, since it got dropped.
> > >
> > > I still see the same error, the head id is the below
> > >
> > > $ git log | head
> > > commit a072afb0b45904022b76deef3b770ee9a93cb13a
> > > Author: Nicholas Krause <xerofoify@...il.com>
> > > Date:   Mon Feb 9 00:27:00 2015 -0800
> > >
> > >     igb: Remove outdated fix me comment in the
> > > function,gb_acquire_swfw_sync_i210
> > >
> > >
> > > thanks,
> > > Hiroshi
> >
> > I'm having our validation see if they can recreate the same issue internally.  When they get back to me I'll let you
> know
> > what we found.
> 
> We did bisect, and the below looks the culprit;
> 
> 32dce968dd987adfb0c00946d78dad9154f64759 is the first bad commit
> commit 32dce968dd987adfb0c00946d78dad9154f64759
> Author: Vlad Yasevich <vyasevich@...il.com>
> Date:   Sat Jan 31 10:40:18 2015 -0500
> 
>     ipv6: Allow for partial checksums on non-ufo packets
> 
>     Currntly, if we are not doing UFO on the packet, all UDP
>     packets will start with CHECKSUM_NONE and thus perform full
>     checksum computations in software even if device support
>     IPv6 checksum offloading.
> 
>     Let's start start with CHECKSUM_PARTIAL if the device
>     supports it and we are sending only a single packet at
>     or below mtu size.
> 
>     Signed-off-by: Vladislav Yasevich <vyasevic@...hat.com>
>     Signed-off-by: David S. Miller <davem@...emloft.net>
> 
> :040000 040000 4437eaf7e944f5a6136ebf668a256fee688fda3d fade8da998d35c8da97a15f0556949ad371e5347 M      net

When I reverted the commit, the issue was solved.

thanks,
Hiroshi