From: Roland Dreier <rdreier@cisco.com>
To: CaT <cat@zip.com.au>
Cc: Michael Chan <mchan@broadcom.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: intermittant petabyte usage reported with broadcom nic
Date: Thu, 12 Apr 2007 16:28:37 -0700 [thread overview]
Message-ID: <adak5whdvfe.fsf@cisco.com> (raw)
In-Reply-To: <20070412225249.GU8345@zip.com.au> (cat@zip.com.au's message of "Fri, 13 Apr 2007 08:52:49 +1000")
[Adding Michael Chan, who seems to look after bnx2, to the cc list]
> To clarify it's an Intel Dual Core Xeon (I just wound up as thinking of
> them all as amd64s). Network card driver in use is the one defined by
> CONFIG_BNX2. Kernel's monolithic.
>From a quick look at bnx2.c, it seems that the driver gives the NIC
(firmware?) a block of memory to DMA stats into, and just reads from
that memory in its get_stats method. So if you're seeing wonky stats
from the NIC intermittently, my best guess would be that firmware is
occasionally writing junk into the stats block.
- R.
next prev parent reply other threads:[~2007-04-12 23:28 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20070402014319.GA8345@zip.com.au>
2007-04-02 7:13 ` intermittant petabyte usage reported with broadcom nic Andrew Morton
2007-04-02 7:41 ` CaT
2007-04-02 10:31 ` Jean-Daniel Pauget
2007-04-15 0:20 ` Michael Chan
2007-04-16 19:10 ` Michael Chan
2007-04-16 23:43 ` CaT
2007-04-17 12:01 ` Jean-Daniel Pauget
2007-04-17 15:58 ` Roland Dreier
2007-05-22 1:15 ` Michael Chan
2007-04-12 22:52 ` CaT
2007-04-12 23:13 ` Andrew Morton
2007-04-12 23:18 ` Roland Dreier
2007-04-12 23:25 ` CaT
2007-04-12 23:15 ` Roland Dreier
2007-04-12 23:28 ` Roland Dreier [this message]
2007-04-13 1:15 ` Andi Kleen
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