Re: Basic testing shows 2.3.99-pre9-3 bad, pre9-2 good

Re: Basic testing shows 2.3.99-pre9-3 bad, pre9-2 good

[Rik van Riel]

On Sun, 21 May 2000, Lawrence Manning wrote:

> That's my observation anyway.  I did some dd and bonnie tests
> and got abismal results :-( Machine unusable during dd write
> etc.  pre9-2 on the other hand is close to being as smooth as,
> say, 2.3.51.  What happened? ;)

OK, I guess this means shrink_mmap() should not wait on
*every* locked buffer it runs into ;)

This will destroy both latency (we end up waiting for a
*lot* of buffers) and throughput (waiting on buffers could
interfere with request sorting if we're unlucky).

> I also should chip in to say that 2.2.15 is abit sick IO wise
> for me too.

I'm working on it :)

regards,

Rik
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Re: Basic testing shows 2.3.99-pre9-3 bad, pre9-2 good

[Linus Torvalds]

On Sun, 21 May 2000, Rik van Riel wrote:

> On Sun, 21 May 2000, Lawrence Manning wrote:
> 
> > That's my observation anyway.  I did some dd and bonnie tests
> > and got abismal results :-( Machine unusable during dd write
> > etc.  pre9-2 on the other hand is close to being as smooth as,
> > say, 2.3.51.  What happened? ;)

What happened was really that I did a partial integration just to make it
easier to synchronize. I wanted to basically have pre9-2 + quintela's
patch, but I had too many emails to go through and too many changes of my
own in this area, so I made pre9-3 available so that others could help me
synchronize.

So on't despair, pre9-3 is definitely just a temporary mix of patches, and
is lacking the balancing that Quintela did. 

		Linus

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Re: Basic testing shows 2.3.99-pre9-3 bad, pre9-2 good

[Quintela Carreira Juan J.]

>>>>> "linus" == Linus Torvalds <torvalds@transmeta.com> writes:

linus> On Sun, 21 May 2000, Rik van Riel wrote:

>> On Sun, 21 May 2000, Lawrence Manning wrote:
>> 
>> > That's my observation anyway.  I did some dd and bonnie tests
>> > and got abismal results :-( Machine unusable during dd write
>> > etc.  pre9-2 on the other hand is close to being as smooth as,
>> > say, 2.3.51.  What happened? ;)

linus> What happened was really that I did a partial integration just to make it
linus> easier to synchronize. I wanted to basically have pre9-2 + quintela's
linus> patch, but I had too many emails to go through and too many changes of my
linus> own in this area, so I made pre9-3 available so that others could help me
linus> synchronize.

linus> So on't despair, pre9-3 is definitely just a temporary mix of patches, and
linus> is lacking the balancing that Quintela did. 

Hi Linus
   I am working in introducing my balancing changes in pre9-3, but I
   am having problems with it.  Now my machines get deadlocked and I
   get a lot of Oopses.  I am investigating on that.  I get Oops
   indeed in the pre9-3 vanilla kernel.  I am studying it to write a
   report of the situation.

   My SMP machine is new, It has passed 6 hours of memtest86 memory
   checker, but I don't know what to blame at the moment.  I am
   compiling for my old UP machines to test the differences.

Later, Juan.

PD.
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   my department in the University (http://carpanta.dc.fi.udc.es/)
   have bought me an SMP machine.
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