Date: Thu, 14 Dec 2017 18:59:00 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 224346] [regression] e1000 rxcsum corruption Message-ID: <bug-224346-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224346 Bug ID: 224346 Summary: [regression] e1000 rxcsum corruption Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Keywords: regression Severity: Affects Many People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: gjb@FreeBSD.org CC: sbruno@FreeBSD.org There appears to be a regression in e1000-based drivers (em(4), igb(4)) which intermittently causes data corruption with rxcsum enabled. I do not have an exact timeframe, but it appears to be roughly within the past two months or so. When building arm snapshots, math/mpfr is a dependent port which, for the past several weeks had caused build failures due to a checksum mismatch. It is not 100% reproducible, but this port specifically has been the consistent cause of the build failures. When looking into the root cause of the checksum mismatch, I noticed that manually fetching the distfile for the math/mpfr port did not always produce an incorrect checksum. Looking closer at several different machines running various versions of 12-CURRENT ranging from September through early November, some with different NICs (bge(4) being the most common non-e1000 NIC), it became apparent that the key common element for the intermittent corrupted distfile was the network driver. Looking further, I discovered that when rxcsum is turned off via ifconfig(8), the problem is no longer reproducible. It should be noted that the failures have not been observed with other ports, and I am uncertain what about the master site for math/mpfr is special in this regard, but this testing has been repeated numerous times with similar results. With rxcsum enabled: # ifconfig igb0 igb0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=e505bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,LRO,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6> # for i in $(seq 1 9); do fetch -4 -o ${i}.tar.xz http://www.mpfr.org/mpfr-current/mpfr-3.1.6.tar.xz; sha256 -q ${i}.tar.xz; done 1.tar.xz 100% of 1107 kB 585 kBps 00m02s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 2.tar.xz 100% of 1107 kB 597 kBps 00m02s 3cf25a685c0dda614e320e7263299f2897425a55302a51bc69a2df449d7d34a6 3.tar.xz 100% of 1107 kB 704 kBps 00m02s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 4.tar.xz 100% of 1107 kB 565 kBps 00m02s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 5.tar.xz 100% of 1107 kB 627 kBps 00m02s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 6.tar.xz 100% of 1107 kB 633 kBps 00m02s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 7.tar.xz 100% of 1107 kB 637 kBps 00m02s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 8.tar.xz 100% of 1107 kB 290 kBps 00m04s 8f429167a0225c62063b62f3fe6eff70a0dafcdee15d3ead7d90bb533d1b64bd 9.tar.xz 100% of 1107 kB 492 kBps 00m02s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 With rxcsum disabled: # ifconfig igb0 igb0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=c505ba<TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,LRO,VLAN_HWFILTER,VLAN_HWTSO,TXCSUM_IPV6> # for i in $(seq 1 9); do fetch -4 -o ${i}.tar.xz http://www.mpfr.org/mpfr-current/mpfr-3.1.6.tar.xz; sha256 -q ${i}.tar.xz; done 1.tar.xz 100% of 1107 kB 202 kBps 00m06s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 2.tar.xz 100% of 1107 kB 269 kBps 00m04s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 3.tar.xz 100% of 1107 kB 445 kBps 00m03s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 4.tar.xz 100% of 1107 kB 127 kBps 00m09s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 5.tar.xz 100% of 1107 kB 384 kBps 00m03s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 6.tar.xz 100% of 1107 kB 182 kBps 00m06s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 7.tar.xz 100% of 1107 kB 451 kBps 00m02s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 8.tar.xz 100% of 1107 kB 310 kBps 00m03s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 9.tar.xz 100% of 1107 kB 223 kBps 00m05s 7a62ac1a04408614fccdc506e4844b10cf0ad2c2b1677097f8f35d3a1344a950 -- You are receiving this mail because: You are the assignee for the bug.help
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