Bug 14685
| Summary: | 2.6.30 -> 2.6.31: very high number of RX dropped in bnx2 | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Krzysztof Oledzki (ole) |
| Component: | Network | Assignee: | drivers_network (drivers_network) |
| Status: | RESOLVED DOCUMENTED | ||
| Severity: | normal | CC: | rjw |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.31.6 | Subsystem: | |
| Regression: | Yes | Bisected commit-id: | |
| Bug Depends on: | |||
| Bug Blocks: | 13615 | ||
(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Wed, 25 Nov 2009 00:16:00 GMT bugzilla-daemon@bugzilla.kernel.org wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=14685 > > Summary: 2.6.30 -> 2.6.31: very high number of RX dropped in > bnx2 > Product: Drivers > Version: 2.5 > Kernel Version: 2.6.31.6 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Network > AssignedTo: drivers_network@kernel-bugs.osdl.org > ReportedBy: olel@ans.pl > Regression: Yes > > > After upgradig my kernel from 2.6.30 to 2.6.31 I'm observing very high number > of dropped packets on BCM5708(Dell PowerEdge 1950)/BCM5716(Dell PowerEdge > R410) > NICs. > > # uptime ; ifconfig eth0|grep "RX p"; ethtool -S eth0|grep disc > 01:07:31 up 6 min, 1 user, load average: 0.00, 0.07, 0.04 > RX packets:2234 errors:0 dropped:527 overruns:0 frame:0 > rx_discards: 0 > rx_fw_discards: 527 > > Everything seems to work just fine so I suspect that the driver/firmware is > counting something wrong. > Reply-To: ole@ans.pl On Mon, 30 Nov 2009, Michael Chan wrote: > Andrew Morton wrote: > >>> # uptime ; ifconfig eth0|grep "RX p"; ethtool -S eth0|grep disc >>> 01:07:31 up 6 min, 1 user, load average: 0.00, 0.07, 0.04 >>> RX packets:2234 errors:0 dropped:527 overruns:0 frame:0 >>> rx_discards: 0 >>> rx_fw_discards: 527 >>> > > Please report rx_bcast_packets and rx_mcast_packets together with > rx_fw_discards. Thanks. # ethtool -S eth0|egrep "(rx_bcast_packets|rx_mcast_packets|rx_fw_discards)" rx_mcast_packets: 2806 rx_bcast_packets: 790016 rx_fw_discards: 790016 Best regards, Krzysztof Olędzki Reply-To: ole@ans.pl On 2009-11-30 18:44, Michael Chan wrote: > On Mon, 2009-11-30 at 07:33 -0800, Krzysztof Oledzki wrote: >> # ethtool -S eth0|egrep "(rx_bcast_packets|rx_mcast_packets| >> rx_fw_discards)" >> rx_mcast_packets: 2806 >> rx_bcast_packets: 790016 >> rx_fw_discards: 790016 > > This tells me that all the dropped packets are occurring in the iSCSI > ring. > > We have recently enabled iSCSI in the kernel and you probably don't have > the userspace components to handle the iSCSI ring. All broadcast > packets are also received in the iSCSI ring and they are all dropped in > this case without the userspace components. Networking is not affected. > If you rmmod the bnx2i and cnic drivers, the drop counter should stop > counting. > > We have newer firmware that will not include dropped iSCSI packets in > the networking counters. It should appear in the 2.6.33 kernel > time-frame. Yep, it was the cnic driver. Now I feel silly. Thank you for you help and sorry for the noise. I going to close it with RESOLVED-DOCUMENTED. Best regards, Krzysztof Olędzki |
After upgradig my kernel from 2.6.30 to 2.6.31 I'm observing very high number of dropped packets on BCM5708(Dell PowerEdge 1950)/BCM5716(Dell PowerEdge R410) NICs. # uptime ; ifconfig eth0|grep "RX p"; ethtool -S eth0|grep disc 01:07:31 up 6 min, 1 user, load average: 0.00, 0.07, 0.04 RX packets:2234 errors:0 dropped:527 overruns:0 frame:0 rx_discards: 0 rx_fw_discards: 527 Everything seems to work just fine so I suspect that the driver/firmware is counting something wrong.