I found the problem: sometime between the May 8 kernel I'd been using
and the new one (latest build: 15:02:36 CST today), my system decided
to devour socket buffers. I set kern.ipc.maxsockbuf=16777216 and have
over an hour of stable multi-user uptime, which is a vast improvement!
On Jun 9, 2011, at 9:37 AM, Kirk Strauser wrote:
I have a FreeBSD 8-STABLE system that's been running stably since I
last upgraded and rebooted on May 8. Yesterday, I updated /usr/src
to get ZFS v28 and also seem to have gotten rid of my nice, solid
re0 network interface:
re0: <RealTek 8168/8111 B/C/CP/D/DP/E PCIe Gigabit Ethernet> port
0xb000-0xb0ff mem 0xea210000-0xea210fff,0xea200000-0xea20ffff irq 16
at device 0.0 on pci5
re0: Using 1 MSI-X message
re0: Chip rev. 0x3c000000
re0: MAC rev. 0x00400000
miibus0: <MII bus> on re0
I'm too tired from lack of sleep due to getting the system back up
and running to remember all the details, but the summary is that it
started autodetecting its media as 10baseT/UTP. Almost immediately
after boot - sometimes while still playing in single-user mode - I'd
start seeing "no buffer space available" error messages all over the
place.
Forcing media to 1000baseTX/full-duplex fixed the problem for a few
minutes, but it wouldn't stay in that state and would shortly start
throwing "no buffer space available" errors again. Until I've gotten
some sleep and have more mental energy to figure out exactly what's
going on, I've found that forcing the media to 100baseTX keeps it
solidly chugging along (if a little slowly).
Anyway, that's where I'm at now. If your re NIC is giving you fits
this morning, try setting it to 100baseTX and see if that'll get you
running until a better fix comes along.
- Kirk
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