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Date:      Wed, 20 Nov 1996 14:50:04 -0600
From:      Chris Csanady <ccsanady@friley216.res.iastate.edu>
To:        Peter Wemm <peter@spinner.dialix.com>
Cc:        Steve Passe <smp@csn.net>, freebsd-smp@freebsd.org
Subject:   Re: vm_page_alloc(ZERO): missing pages... 
Message-ID:  <199611202050.OAA02373@friley216.res.iastate.edu>
In-Reply-To: Your message of Thu, 21 Nov 1996 04:40:24 %2B0800. <199611202040.EAA12623@spinner.DIALix.COM> 

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>Steve Passe wrote:
>> Hi,
>> 
>> > I'm not sure exactly what this means, but I get the following messages wit
h
>> > the current SMP kernel.  This is with APIC_IO and APIC_LAZY defined..
>> > 
>> > vm_page_alloc(ZERO): missing pages on cache queue: 4
>> > vm_page_alloc(ZERO): missing pages on cache queue: 3
>> > vm_page_alloc(ZERO): missing pages on cache queue: 1
>> > vm_page_alloc(NORMAL): missing pages on cache queue: 1
>[..]
>> Any vm experts out there who can give a generic description of this error,
>> or what might cause it?
>
>Also, how much paging is taking place?  We are not propagating TLB flushes 
>to all cpu's yet (needs APIC IPI's to work).

A great deal of paging.  I was running a benchmark (hint) which beats on the
memory quite hard.  VM as well.  Besides being a wonderful benchmark, I also
use it every now and then to try to break things. :)

Are the lacking TLB flushes very harmful?  How hard would this be to implement?

Chris

>
>Cheers,
>-Peter
>
>






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