On Fri, 24 Mar 2000, Alexander Viro wrote:
>On Fri, 24 Mar 2000, David Whysong wrote:
>
>> No, it has overcommitted memory almost since the beginning. These comments
>> are from linux 1.0.0, in mm/memory.c. Note the dates:
>>
>> /*
>> * demand-loading started 01.12.91 - seems it is high on the list of
>> * things wanted, and it should be easy to implement. - Linus
>> */
>>
>> /*
>> * Ok, demand-loading was easy, shared pages a little bit tricker. Shared
>> * pages started 02.12.91, seems to work. - Linus.
>> *
>> * Tested sharing by executing about 30 /bin/sh: under the old kernel it
>> * would have taken more than the 6M I have free, but it worked well as
>> * far as I could see.
>> *
>> * Also corrected some "invalidate()"s - I wasn't doing enough of them.
>> */
>
>RTFComments. Sharing of text pages is unrelated to overcommit.
But demand loading certainly is related to overcommit, unless the kernel
was careful to count how many pages it hasn't loaded yet?
Dave
David Whysong dwhysong@physics.ucsb.edu
Astrophysics graduate student University of California, Santa Barbara
My public PGP keys are on my web page - http://www.physics.ucsb.edu/~dwhysong
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