i have a ss20 w/ dual 125Mhz ross and a 10/100+FWSE (SUNW,fas) sbus card.
running a well stripped and fairly recent kernel (sys/ from ~2/20) +
andrey's fas366 patch.

using the FE and with or without using any of the disks on the FAS buss,
i get random stray interrupt log msgs.

stray interrupt ipl 0x7 pc=0xf0007ee0 npc=0xf0007ee4 psr=1e4000c3<S,PS>
 
login: stray interrupt ipl 0x7 pc=0xf0007efc npc=0xf0007edc psr=1e4000c4<S,PS> 

it always seems to clear just fine (no panics).  i can't seem to correlate
it to any specific activity and dont know enough about the inards of the
kernel yet.  so, any pointers?

i gather that the interrupt is coming from the hme.

espmatch_sbus: SUNW,hme
hme0 at sbus0 slot 3 offset 0x8c00000 level 4 (ipl 7): address 08:00:20:76:12:73
nsphy0 at hme0 phy 1: DP83840 10/100 media interface, rev. 1
nsphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
espmatch_sbus: SUNW,fas
esp1 at sbus0 slot 3 offset 0x8800000 level 3 (ipl 5)esp1: espattach_sbus: sc_id 7, freq 40000000