Re: HEADS-UP: await/asleep removal imminent

[Poul-Henning Kamp]

In message <[EMAIL PROTECTED]>, John Baldwin writes:
>
>On 17-Jan-01 Poul-Henning Kamp wrote:
>> 
>>>Perhaps you can explain how you're able to trigger this instability
>>>with a test script?  Poul-Henning told me he just needed to do a
>>>make -j256 world, I did 10 of them without a problem...
>> 
>> Then you misunderstood me, I don't have anything in the dept
>> of SMP hw which can trigger it.
>
>Ok, what _does_ trigger this then?

My theory is that it's related to disk-IO.

My guess is that it may be related to calling a *_strategy()
routine from an interrupt routine.   That is what sets ccd,
ata-raid and vinum apart from normal disk-IO.

--
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
[EMAIL PROTECTED]         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.


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