Document about page and buffer cache.

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Hi,

Are there any good documentation on the interaction of buffer cache
and page cache. What I am particularly interested in is :

a) How the buffer_heads interact with page cache to submit read/write requests.
b) How are they mapped in a page.

Any/all of the other gory details. Any links/pointers will be useful.
Even if someone can point me to the code piece from where I should
start learning about this.

Also I couldnt find the definitions of some commonly used
functions/macros in the source like.

test_set_buffer_req(bh)
buffer_mapped(bh)
buffer_locked(bh)
buffer_ordered(bh)

etc.... what am i missing ??

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Thanks & Regards,
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Manish Katiyar  ( http://mkatiyar.googlepages.com )
3rd Floor, Fair Winds Block
EGL Software Park
Off Intermediate Ring Road
Bangalore 560071, India
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