From: Dave Hansen <haveblue@us.ibm.com>
To: "Luciano A. Stertz" <luciano@tteng.com.br>
Cc: linux-mm <linux-mm@kvack.org>
Subject: Re: [Fwd: Page allocator doubt]
Date: Thu, 11 Nov 2004 11:36:56 -0800 [thread overview]
Message-ID: <1100201816.7883.22.camel@localhost> (raw)
In-Reply-To: <4193BD07.5010100@tteng.com.br>
On Thu, 2004-11-11 at 11:27, Luciano A. Stertz wrote:
> But... are they allocated to me, even with page_count zeroed? Do I need
> to do get_page on the them? Sorry if it's a too lame question, but I
> still didn't understand and found no place to read about this.
Do you see anywhere in the page allocator where it does a loop like
yours?
for (i = 1; i< 1<<order; i++)
get_page(page + i);
When you do a multi-order allocation, the first page represents the
whole group and they're treated as a whole. As you've noticed, breaking
them up requires a little work.
Why don't you post all of the code that you're using so that we can tell
what you're doing? There might be a better way. Drivers probably
shouldn't be putting stuff in the page cache all by themselves.
-- Dave
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next prev parent reply other threads:[~2004-11-11 19:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-11 14:37 Luciano A. Stertz
2004-11-11 19:10 ` Dave Hansen
2004-11-11 19:27 ` Luciano A. Stertz
2004-11-11 19:36 ` Dave Hansen [this message]
2004-11-11 20:22 ` Luciano A. Stertz
2004-11-11 20:34 ` Dave Hansen
2004-11-11 21:21 ` Marcelo Tosatti
2004-11-12 11:37 ` Luciano A. Stertz
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