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From: Nate Williams <nate@sri.MT.net>
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To: bugs@freebsd.netcom.com (Mark Hittinger)
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Subject: re: processes won't die (fwd)
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[ Swapping on IDE and SCSI causes problems ]

> > Does this problem exist w/current or stable?  I'm running a 2.1R box
> > with swap on both under sometimes heavy loads with no problems.
> 
> I see the problem under both current and stable.  I'm starting to suspect
> that there is a weird swap disk i/o transaction that is screwing up in the
> scsi subsystem, and that the same kind of transaction doesn't happen in
> the ufs world.
> 
> What are your scsi drives and what is your controller?  How much swap space
> do you have on your system and how much memory do you have?

Let me go look.

FreeBSD 2.1-STABLE #3: Mon Jan  8 17:47:44 MST 1996
    root@moth.sri.MT.net:/usr/src/sys/compile/SNDMOTH
CPU: 99-MHz Pentium 735\\90 or 815\\100 (Pentium-class CPU)
  Origin = "GenuineIntel"  Id = 0x525  Stepping=5
  Features=0x1bf<FPU,VME,PSE,MCE,CX8,APIC>
real memory  = 33554432 (32768K bytes)
avail memory = 31059968 (30332K bytes)
Probing for devices on the PCI bus:
chip0 <Intel 82437 (Triton)> rev 1 on pci0:0
chip1 <Intel 82371 (Triton)> rev 2 on pci0:7
...
ncr0 <ncr 53c810 scsi> rev 2 int a irq 11 on pci0:12
(ncr0:0:0): "FUJITSU M1606S-512 6220" type 0 fixed SCSI 2
...
wdc0: unit 0 (wd0): <WDC AC31000H>
wd0: 1033MB (2116800 sectors), 2100 cyls, 16 heads, 63 S/T, 512 B/S

[ The above disk is a 1Gig WD Cavier drive.  (Don't ask, I didn't buy it) ]

moth:/home/nate % swapinfo
Device      1K-blocks     Used    Avail Capacity  Type
/dev/sd0s2b     65536        0    65472     0%    Interleaved
/dev/wd0s3b     49152        0    49088     0%    Interleaved
Total          114560        0   114560     0%

This machine boots off both the SCSI disk or the IDE disk (SCSI == 2.1R
and IDE == old current ]



Nate