Re: pmap and mtx scalability problem

It's a bit dated at this point. Nonetheless, when gitorious is able to
give something other than 503 to my search queries I'll post it.

On Tue, Apr 24, 2012 at 10:45 PM, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote=
:
> On Tue, Apr 24, 2012 at 10:43:08PM +0200, K. Macy wrote:
>
>> No. I developed a patch from Jeffr that pushed the vm_page_lock array
>> down in to the machine dependent code, replacing most of the uses of
>> the single vm_page_queue_lock. However, alc doesn't like the design
>> and has not proposed an alternative.
>
> can i test this?
>
>> -Kip
>>
>> On Tue, Apr 24, 2012 at 10:36 PM, Slawa Olhovchenkov <slw@zxy.spb.ru> wr=
ote:
>> > On Tue, Apr 24, 2012 at 09:27:30PM +0200, K. Macy wrote:
>> >
>> >> Known problem. There is an open disagreement about how to improve the
>> >> granularity of locking in pmap.
>> >
>> > split locking to process-specific information and global information?
>> > use lock-free lists (i see TAILQ_INSERT_TAIL in pmap_enter)?
>> >
>> > sorry for stupidity, if any.
>>
>>
>>
>> --
>> =A0 =A0?The real damage is done by those millions who want to 'get by.'
>> The ordinary men who just want to be left in peace. Those who don?t
>> want their little lives disturbed by anything bigger than themselves.
>> Those with no sides and no causes. Those who won?t take measure of
>> their own strength, for fear of antagonizing their own weakness. Those
>> who don?t like to make waves?or enemies.
>>
>> =A0 =A0Those for whom freedom, honour, truth, and principles are only
>> literature. Those who live small, love small, die small. It?s the
>> reductionist approach to life: if you keep it small, you?ll keep it
>> under control. If you don?t make any noise, the bogeyman won?t find
>> you.
>>
>> =A0 =A0But it?s all an illusion, because they die too, those people who
>> roll up their spirits into tiny little balls so as to be safe. Safe?!
>> >From what? Life is always on the edge of death; narrow streets lead to
>> the same place as wide avenues, and a little candle burns itself out
>> just like a flaming torch does.
>>
>> =A0 =A0I choose my own way to burn.?
>>
>> =A0 =A0Sophie Scholl

--=20
=A0 =A0=93The real damage is done by those millions who want to 'get by.'
The ordinary men who just want to be left in peace. Those who don=92t
want their little lives disturbed by anything bigger than themselves.
Those with no sides and no causes. Those who won=92t take measure of
their own strength, for fear of antagonizing their own weakness. Those
who don=92t like to make waves=97or enemies.

=A0 =A0Those for whom freedom, honour, truth, and principles are only
literature. Those who live small, love small, die small. It=92s the
reductionist approach to life: if you keep it small, you=92ll keep it
under control. If you don=92t make any noise, the bogeyman won=92t find
you.

=A0 =A0But it=92s all an illusion, because they die too, those people who
roll up their spirits into tiny little balls so as to be safe. Safe?!
>From what? Life is always on the edge of death; narrow streets lead to
the same place as wide avenues, and a little candle burns itself out
just like a flaming torch does.

=A0 =A0I choose my own way to burn.=94

=A0 =A0Sophie Scholl
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