page cache and buffer cache in 2.4.18 and up

[Amir Hermelin]

Hi,
Since the change in kernel 2.4, read and writes go both through the page and
buffer cache. Is the cached data held twice (i.e. uses twice the memory)? I
noticed that the struct page holds a pointer to a buffer-head list; does
that list contain actual data, or just pointers into the cached page data?

Thanks,
Amir.


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