internel implemention of file operation

[Rajat Sharma]

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On Thu, Jan 3, 2013 at 12:29 PM, horseriver <horserivers at gmail.com> wrote:

> hi:
>
>   when one file is opened , does its  data be put into memory ? and all
> operation on this file
>
>   will be implemented by operation on its mapping memory area ?
>
> thanks!
>
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