This is a multi-part message in MIME format.
--------------080302050205060102070808
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Matt Thomas wrote:
> Michael L. Hitch wrote:
> 
>> On Tue, 3 Apr 2007, Johnny Billquist wrote:
>>
>>>>> Also, probably very unrelated. A kernel as built today is not 
>>>>> useable. It goes up to about 100% system time as soon as I copy 
>>>>> anything from an NFS mounted disk to a local disk on my VAX.
>>>>> This is 4.99.16. I have an older build (4.99.15) where this don't 
>>>>> happen, so something changed recently. But like I said, I don't 
>>>>> think that is related to GCC.
>>>>
>>>>   I think this is related to mutex_spin_{enter,exit), which I am 
>>>> looking at.  I think it also causes the le0 device to not be 
>>>> detected on my 4000/VLC, and probably on the 3100 mentioned in an 
>>>> earlier port-vax message.
>>>>
>>>>   A work-around may be to build a kernel with LOCKDEBUG.
>>>
>>> Hmm. Might try that later. Anyway. The problem is something that 
>>> happened after march 15, since my kernel from march 15 works fine.
>>
>>   It appears that the gcc changes that enabled PIC support may be to 
>> blame.  I built a kernel using sources from 2007.04.01.06.00.00, but 
>> using the tools from the day before.  That kernel seemed to run fine.  
>> Then I rebuilt the tools and another kernel.  That kernel now exhibits 
>> the problem of spending a lot of time in the kernel.  It seems to be 
>> related to writing to the filesystem - that's the only time I've seen 
>> the problem.
> 
> I believe the gcc codegen problems have been fixed.

Whatever the problem is, it still exists.
I noted that you checked in some new stuff for GCC, as well as the mutex 
fixes Michael posted about, Matt. Things look good when booting up, but 
as soon as I try to do something heavy on the disk, the cpu time runs up 
to 100% system time, and the system hangs.
Something is still bad, which was introduced after the 15 of March, and 
Michael seems to have narrowed it down to something in GCC... Hmmm... 
Any ideas on how to diagnose this?

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt@softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol

--------------080302050205060102070808
Content-Type: text/x-vcard; charset=utf-8;
 name="bqt.vcf"
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment;
 filename="bqt.vcf"

begin:vcard
fn:Johnny Billquist
n:Billquist;Johnny
email;internet:bqt@softjar.se
tel;cell:+46 70-8641486
x-mozilla-html:FALSE
version:2.1
end:vcard


--------------080302050205060102070808--