In message <[EMAIL PROTECTED]>, John Baldwin writes:
>On 20-Jan-01 Poul-Henning Kamp wrote:
>> In message <[EMAIL PROTECTED]>, John Baldwin writes:
>>>On 20-Jan-01 The Hermit Hacker wrote:
>>>> On Sat, 20 Jan 2001, Mark Murray wrote:
>>>>> >
>>>>> > on a 2xPII/350, 256M, two scsi disks on ahc, and ccd I have three times
>>>>> > now hung the machine so that only reset got any attention simply by
>>>>> >    make -j 128 world
>>>>> Do you have an easy way to narrow it down to CCD by doing the same
>>>>> thing but without ccd involvement?
>>>> I don't have CCD, and got home last night from the office and mine was
>>>> hung also, on a kernel from the day before ... being in X, pretty much
>>>> nothing I could do to try and debug it ... new laptop gets in this week,
>>>> so will be setting up the whole serial console debugging env ...
>>>Is it SMP, and does it have multiple SCSI disks hanging off of the same
>> SMP, one scsi disk on each controller, /usr and /home ccd'ed.
>Is there any code dealing with disk I/O in the kernel that does the equivalent
>of this:
>while (!io_done)
>  /* spin */ ;
>That assumes an interrupt will set io_done?
>Using DELAY() in places might explain this.

Not that I know of.

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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