Re: Possible Idea with filesystem buffering.

Hans Reiser
2002-01-22T18:50:31Z

Rik van Riel wrote:

>On Tue, 22 Jan 2002, Chris Mason wrote:
>
>>It seems like the basic features we are suggesting are very close, I'll try
>>one last time to make a case against the 'free_some_pages' call ;-)
>>
>
>>The FS doesn't know how long a page has been dirty, or how often it
>>gets used,
>>
>
>In an efficient system, the FS will never get to know this, either.
>

I don't understand this statement. If dereferencing a vfs op for every
page aging is too expensive, then ask it to age more than one page at a
time. Or do I miss your meaning?

>
>
>The whole idea behind the VFS and the VM is that calls to the FS
>are avoided as much as possible, in order to keep the system fast.
>
In other words, you write the core of our filesystem for us, and we
write the parts that don't interest you?

Maybe this is the real meat of the issue?

Hans