ftp transfer warnings

[Francesco Toscan <francesco_(_at_)_toscan_(_dot_)_biz>]

Hi misc@,

during some FTP downloads from my internal OpenBSD 3.6 stock ftp  
server, xferlog was filled with thousands of these messages:

ftpd[pid]: setsockopt (SO_SNDBUF): No buffer space avaiable

A Windows client was downloading multimedia data (about 20 GBs), active  
FTP mode. Transfer rate was optimal, 10-11MB/sec, average file size was  
about 16 MB.
Transfers like this will increase when a particular multimedia  
application will be deployed to other clients in the network.

I got no download failures, just tons of these messages. Sysctl  
defaults are untouched, this is a fresh 3.6 installation.
How can I avoid these warnings?

OBSD dmesg follows.
TIA,

f.

OpenBSD 3.6 (GENERIC) #59: Fri Sep 17 12:32:57 MDT 2004
     deraadt_(_at_)_i386_(_dot_)_openbsd_(_dot_)_org:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: AMD Athlon(tm) Processor ("AuthenticAMD" 686-class) 908 MHz
cpu0:  
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,F 
XS
R
real mem  = 267935744 (261656K)
avail mem = 237465600 (231900K)
using 3296 buffers containing 13500416 bytes (13184K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(8d) BIOS, date 11/08/00, BIOS32 rev. 0 @  
0xf0f40
apm0 at bios0: Power Management spec V1.2
apm0: AC on, battery charge unknown
pcibios0 at bios0: rev 2.1 @ 0xf0000/0x17c2
pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xf1710/176 (9 entries)
pcibios0: PCI Interrupt Router at 000:04:0 ("VIA VT82C686 ISA" rev 0x00)
pcibios0: PCI bus #1 is the last bus
bios0: ROM list: 0xc0000/0xa400 0xcc000/0x800
cpu0 at mainbus0
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "VIA VT8363 Host" rev 0x02
ppb0 at pci0 dev 1 function 0 "VIA VT8363 AGP" rev 0x00
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "Nvidia Vanta" rev 0x15
wsdisplay0 at vga1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
pcib0 at pci0 dev 4 function 0 "VIA VT82C686 ISA" rev 0x22
pciide0 at pci0 dev 4 function 1 "VIA VT82C571 IDE" rev 0x10: ATA66,  
channel 0 configured to compatibility, channel 1 configured to  
compatibility
wd0 at pciide0 channel 0 drive 0: <QUANTUM FIREBALLP AS20.5>
wd0: 16-sector PIO, LBA, 19595MB, 40132503 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 4
atapiscsi0 at pciide0 channel 1 drive 1
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <LG, CD-ROM CRD-8521B, 1.00> SCSI0  
5/cdrom removable
cd0(pciide0:1:1): using PIO mode 4, DMA mode 2
uhci0 at pci0 dev 4 function 2 "VIA VT83C572 USB" rev 0x10: irq 5
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci1 at pci0 dev 4 function 3 "VIA VT83C572 USB" rev 0x10: irq 5
usb1 at uhci1: USB revision 1.0
uhub1 at usb1
uhub1: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
viaenv0 at pci0 dev 4 function 4 "VIA VT82C686 SMBus" rev 0x30: disabled
xl0 at pci0 dev 9 function 0 "3Com 3c905C 100Base-TX" rev 0x74: irq 5,  
address 0
0:01:02:de:a5:b7
exphy0 at xl0 phy 24: Broadcom 3C905C internal PHY, rev. 6
eap0 at pci0 dev 11 function 0 "Ensoniq CT5880" rev 0x02: irq 10
eap0: eap1371_read_codec timeout 2
ac97: codec id 0x83847609 (SigmaTel STAC9721/23)
ac97: codec features 18 bit DAC, 18 bit ADC, SigmaTel 3D
audio0 at eap0
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: using exception 16
pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pccom1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
biomask eb65 netmask eb65 ttymask fbe7
pctr: user-level cycle counter enabled
mtrr: Pentium Pro MTRR support
dkcsum: wd0 matched BIOS disk 80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302

[demime 0.98d removed an attachment of type application/pkcs7-signature which had a name of smime.p7s]