From: Eric Dumazet <eric.dumazet@gmail.com>
To: Ben Greear <greearb@candelatech.com>
Cc: NetDev <netdev@vger.kernel.org>
Subject: Re: pktgen and spin_lock_bh in xmit path
Date: Tue, 20 Oct 2009 05:48:10 +0200 [thread overview]
Message-ID: <4ADD32FA.6030409@gmail.com> (raw)
In-Reply-To: <4ADD309B.1040505@candelatech.com>
Ben Greear a écrit :
> I'm having strange issues when running pktgen on 10G interfaces while
> also running
> pktgen on mac-vlans on that interface, when the mac-vlan pktgen threads
> are on a different
> CPU.
>
> First, lockdep gives up and says that things are not properly
> annotated. I believe this is because
> the macvlan tx path will lock it's txq and will also lock the
> lower-dev's txq. To fix this, perhaps
> we need some new lockdep aware primitives for netdev txq locking?
>
> Second, is using _bh() locking really sufficient if we have pktgen
> writing to a physical device
> and also have other pktgen threads writing to that same device though
> mac-vlans? I'm seeing
> deadlocks spinning on the _bh() lock in pktgen as well as strange
> corruptions, so I think there
> must be *some* problem somewhere, I just don't know quite what it is yet.
>
Could you please give us a copy if your pktgen scripts ?
next prev parent reply other threads:[~2009-10-20 3:48 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-20 3:38 pktgen and spin_lock_bh in xmit path Ben Greear
2009-10-20 3:48 ` Eric Dumazet [this message]
2009-10-20 4:52 ` Ben Greear
2009-10-20 17:37 ` Ben Greear
2009-10-20 17:44 ` Eric Dumazet
2009-10-20 17:54 ` Ben Greear
2009-10-20 18:35 ` Eric Dumazet
2009-10-20 18:54 ` Eric Dumazet
2009-10-20 20:16 ` Ben Greear
2009-10-20 21:10 ` Ben Greear
2009-10-20 21:22 ` Eric Dumazet
2009-10-20 21:30 ` Ben Greear
2009-10-20 21:57 ` Eric Dumazet
2009-10-20 23:17 ` Ben Greear
2009-10-21 3:05 ` Ben Greear
2009-10-21 3:12 ` Eric Dumazet
2009-10-21 3:59 ` Eric Dumazet
2009-10-21 5:00 ` Ben Greear
2009-10-21 5:14 ` Eric Dumazet
2009-10-21 5:40 ` Ben Greear
2009-10-21 5:12 ` Krishna Kumar2
2009-10-21 5:32 ` Ben Greear
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