lkml.org 
[lkml]   [2000]   [Sep]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH *] VM patch for 2.4.0-test8
   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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:38    [W:2.412 / U:0.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site