From: "Juan J. Quintela" <quintela@fi.udc.es>
Date: 14 Sep 2000 08:11:40 +0200
I can only see one place where we add a page to the page cache and
we don't increase its page count, and it is in grow_buffers().
Could somebody explain me _why_ we don't need to do a
page_cache_get(page) in that function?
It's being added only to the LRU lists, not the page cache hashes. It
is a buffer-cache page not a page-cache page (ie. page->mapping ==
NULL).
The alloc_page() returns the page with a single reference, which thus
represents the refence to the page held by the buffer heads
grow_buffers attaches to it.
Later,
David S. Miller
davem@redhat.com
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