Date: Fri, 09 Apr 2010 15:00:30 -0400 From: Mike Tancsa <mike@sentex.net> To: Jack Vogel <jfvogel@gmail.com>, pyunyh@gmail.com Cc: freebsd-current@freebsd.org Subject: LOR on em in HEAD ( was Re: em driver regression Message-ID: <201004091900.o39J0b0k051687@lava.sentex.ca> In-Reply-To: <g2u2a41acea1004090945p6f77ee30yeb9fbab9a8e43863@mail.gmail .com> References: <201004081313.o38DD4JM041821@lava.sentex.ca> <201004081446.o38EkU7h042296@lava.sentex.ca> <20100408181741.GI5734@michelle.cdnetworks.com> <201004081831.o38IVR3s043434@lava.sentex.ca> <20100408205626.GN5734@michelle.cdnetworks.com> <201004082105.o38L5DCH044187@lava.sentex.ca> <n2q2a41acea1004081406o969e7acbla0cef35f65f14f0a@mail.gmail.com> <20100408230750.GR5734@michelle.cdnetworks.com> <201004091317.o39DHFEl049965@lava.sentex.ca> <20100409164115.GB1085@michelle.cdnetworks.com> <g2u2a41acea1004090945p6f77ee30yeb9fbab9a8e43863@mail.gmail.com>
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While testing an i5 box with HEAD checked out from this morning,
bringing up the second NIC generated this LOR on the console
em1: link state changed to UP
lock order reversal:
1st 0xc5dc7c10 em1:rx(1) (em1:rx(1)) @
/usr/HEAD/src/sys/modules/em/../../dev/e1000/if_em.c:4089
2nd 0xc0f7e88c udp (udp) @ /usr/HEAD/src/sys/netinet/udp_usrreq.c:454
KDB: stack backtrace:
db_trace_self_wrapper(c0cb4d33,c5b72a70,c08e4d65,c08d50db,c0cb7d58,...)
at db_trace_self_wrapper+0x26
kdb_backtrace(c08d50db,c0cb7d58,c5d31a98,c5d2cb60,c5b72acc,...) at
kdb_backtrace+0x29
_witness_debugger(c0cb7d58,c0f7e88c,c0c9cf0b,c5d2cb60,c0cd04ca,...)
at _witness_debugger+0x25
witness_checkorder(c0f7e88c,1,c0cd04ca,1c6,0,...) at witness_checkorder+0x839
_rw_rlock(c0f7e88c,c0cd04ca,1c6,c5d33088,c5e8be24,...) at _rw_rlock+0x9c
udp_input(c67faa00,14,0,c5e8bd80,c0dfa860,...) at udp_input+0x246
ip_input(c67faa00,c5f2f380,c5b72be8,c07463b6,c0dfa860,...) at ip_input+0x606
netisr_dispatch_src(1,0,c67faa00,c5b72c20,c0954bc1,...) at
netisr_dispatch_src+0xcd
netisr_dispatch(1,c67faa00,c6018c00,c6018c00,c6852800,...) at
netisr_dispatch+0x20
ether_demux(c6018c00,c67faa00,3,0,3,...) at ether_demux+0x1a1
ether_input(c6018c00,c67faa00,c11a0e17,ff9,64,...) at ether_input+0x365
em_rxeof(c5e8bd80,109,c6016180,0,c5b72cc8,...) at em_rxeof+0x13c
em_msix_rx(c5dc7c00,c5b72cc8,c088eb14,c0e133c0,c60342b8,...) at em_msix_rx+0x25
intr_event_execute_handlers(c5d807f8,c6034280,c0cacd7e,533,c60342f0,...)
at intr_event_execute_handlers+0x125
ithread_loop(c603b4a0,c5b72d38,c0cacaed,343,c5d807f8,...) at ithread_loop+0x9f
fork_exit(c0877800,c603b4a0,c5b72d38) at fork_exit+0xb8
fork_trampoline() at fork_trampoline+0x8
--- trap 0, eip = 0, esp = 0xc5b72d70, ebp = 0 ---
0(i5b)# uname -a
FreeBSD i5b.sentex.ca 9.0-CURRENT FreeBSD 9.0-CURRENT #2: Fri Apr 9
11:56:25 EDT
2010 mdtancsa@ich10.sentex.ca:/usr/HEAD/obj/usr/HEAD/src/sys/GENERIC i386
0(i5b)#
em0@pci0:0:25:0: class=0x020000 card=0x34ec8086
chip=0x10ef8086 rev=0x05 hdr=0x00
vendor = 'Intel Corporation'
class = network
subclass = ethernet
cap 01[c8] = powerspec 2 supports D0 D3 current D0
cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message
cap 13[e0] = PCI Advanced Features: FLR TP
em1@pci0:3:0:0: class=0x020000 card=0x34ec8086 chip=0x10d38086
rev=0x00 hdr=0x00
vendor = 'Intel Corporation'
device = 'Intel 82574L Gigabit Ethernet Controller (82574L)'
class = network
subclass = ethernet
cap 01[c8] = powerspec 2 supports D0 D3 current D0
cap 05[d0] = MSI supports 1 message, 64 bit
cap 10[e0] = PCI-Express 1 endpoint max data 128(256) link x1(x1)
cap 11[a0] = MSI-X supports 5 messages in map 0x1c enabled
0(i5b)# vmstat -i
interrupt total rate
irq4: uart0 6156 3
irq8: rtc 224879 127
irq21: ehci0 2662 1
irq23: ehci1 3674 2
cpu0: timer 1754210 998
irq256: em0 10778 6
irq257: em1 331 0
irq258: em1 4 0
irq260: em1 4 0
irq261: em1 8 0
irq262: ahci0 69 0
cpu3: timer 1753938 998
cpu2: timer 1753932 998
cpu1: timer 1753886 998
Total 7264531 4134
0(i5b)#
CPU: Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz (2666.65-MHz
686-class CPU)
Origin = "GenuineIntel" Id = 0x106e5 Family = 6 Model = 1e Stepping = 5
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=0x98e3fd<SSE3,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,POPCNT>
AMD Features=0x28100000<NX,RDTSCP,LM>
AMD Features2=0x1<LAHF>
TSC: P-state invariant
real memory = 4294967296 (4096 MB)
avail memory = 2577711104 (2458 MB)
ACPI APIC Table: <INTEL S3420GPC>
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
--------------------------------------------------------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike@sentex.net
Providing Internet since 1994 www.sentex.net
Cambridge, Ontario Canada www.sentex.net/mike
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