Date: Sat, 7 Apr 2012 15:06:38 -0700 From: Jason Wolfe <nitroboost@gmail.com> To: Konstantin Belousov <kostikbel@gmail.com> Cc: jfv@freebsd.org, jhb@freebsd.org, net@freebsd.org Subject: Re: 82574L hangs (with r233708 e1000 driver). Message-ID: <CAAAm0r2t5aKctSA7_1KLagm8_FtSZ%2BZKKV_1n9H-sfo=ndCQrA@mail.gmail.com> In-Reply-To: <20120407133715.GU2358@deviant.kiev.zoral.com.ua> References: <20120407133715.GU2358@deviant.kiev.zoral.com.ua>
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--e89a8fb1f9c4c3774204bd1dfc0a Content-Type: text/plain; charset=ISO-8859-1 On Sat, Apr 7, 2012 at 6:37 AM, Konstantin Belousov <kostikbel@gmail.com> wrote: > I bought Intel Atom motherboard DN2800MT, which has integrated if_em > LOM, reported by pciconf as > em0@pci0:1:0:0: class=0x020000 card=0x20128086 chip=0x10d38086 rev=0x00 hdr=0x00 > 82574L Gigabit Network Connection > It seems that any non-trivial network activity on the interface causes > reliable interface hang, which can be temporary cured by ifconfig down/up. > This happens both with outdated stable/9 sys/dev/e1000 and with driver > from HEAD merged into stable/9. I currently use the copy of dev/e1000 > at rev. r233708. Disabling MSI-X makes the hand to occur slightly less > often. > > I can reproduce the hang in approximately a minute by scp'ing large > file from other machine to /dev/null on the DN2800MT. This makes the > board completely unusable for me. > > The driver reports itself as > em0: <Intel(R) PRO/1000 Network Connection 7.3.2> port 0x2000-0x201f mem 0xc0400000-0xc041ffff,0xc0000000-0xc03fffff,0xc0420000-0xc0423fff irq 16 at device 0.0 on pci1 > em0: attempting to allocate 3 MSI-X vectors (5 supported) > msi: routing MSI-X IRQ 258 to local APIC 0 vector 60 > msi: routing MSI-X IRQ 259 to local APIC 0 vector 61 > msi: routing MSI-X IRQ 260 to local APIC 0 vector 62 > em0: using IRQs 258-260 for MSI-X > em0: Using MSIX interrupts with 3 vectors > em0: bpf attached > em0: Ethernet address: 00:22:4d:7a:47:f6 > em0: Link is up 1000 Mbps Full Duplex > > The board is connected to ProCurve switch, there is no link flaps. > > When hang occur, dmesg output of # sysctl dev.em.0.debug=1 > dev.em.0.debug: Interface is RUNNING and ACTIVE > em0: hw tdh = 357, hw tdt = 357 > em0: hw rdh = 323, hw rdt = 273 > em0: Tx Queue Status = 0 > em0: TX descriptors avail = 1024 > em0: Tx Descriptors avail failure = 0 > em0: RX discarded packets = 0 > em0: RX Next to Check = 274 > em0: RX Next to Refresh = 273 > > [..snip..] > Any help ? Konstantin, It doesn't appear to be the exact issue I was seeing, but here is a patch that did resolve issues with my 82574L buffers filling and requiring a down/up to recover. It was the result of the 'Intel 82574L interface wedging - em7.3.2/8.2-STABLE' if you'd like to peruse that. 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