From: "David S. Miller" <davem@redhat.com>
To: quintela@fi.udc.es
Cc: riel@conectiva.com.br, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, torvalds@transmeta.com
Subject: Re: [PATCH *] VM patch for 2.4.0-test8
Date: Thu, 14 Sep 2000 01:18:56 -0700 [thread overview]
Message-ID: <200009140818.BAA21978@pizda.ninka.net> (raw)
In-Reply-To: <yttg0n3lcyr.fsf@serpe.mitica> (quintela@fi.udc.es)
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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next prev parent reply other threads:[~2000-09-14 8:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-09-14 4:30 Rik van Riel
2000-09-14 5:25 ` David S. Miller
2000-09-14 6:11 ` Juan J. Quintela
2000-09-14 8:18 ` David S. Miller [this message]
2000-09-14 16:53 ` Rik van Riel
2000-09-14 17:49 ` Rik van Riel
2000-09-15 17:28 ` Martin Josefsson
2000-09-15 19:37 ` Jamie Lokier
2000-09-15 21:07 ` David Ford
2000-09-15 22:04 ` Rik van Riel
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