linux-kernel - Re: intermittant petabyte usage reported with broadcom nic

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <adak5whdvfe.fsf@cisco.com>
Date:	Thu, 12 Apr 2007 16:28:37 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	CaT <cat@....com.au>
Cc:	Michael Chan <mchan@...adcom.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: intermittant petabyte usage reported with broadcom nic

[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.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/