From: Marcelo Tosatti <marcelo@conectiva.com.br>
To: bert hubert <ahu@ds9a.nl>
Cc: linux-mm@kvack.org
Subject: Re: http://ds9a.nl/cacheinfo project - please comment & improve
Date: Wed, 30 May 2001 17:27:41 -0300 (BRT) [thread overview]
Message-ID: <Pine.LNX.4.21.0105301719310.5231-100000@freak.distro.conectiva> (raw)
In-Reply-To: <20010530234806.C8629@home.ds9a.nl>
On Wed, 30 May 2001, bert hubert wrote:
> On Wed, May 30, 2001 at 04:54:12PM -0300, Marcelo Tosatti wrote:
>
> > You're using the "address_space->dirty_pages" list to calculate the number
> > of dirty pages.
>
> I was wondering about that. In limited testing I've never seen a non-0
> content of the dirty list. I ran:
>
> dd if=/dev/zero of=test count=100000 &
> while true ; do ./cinfo test; done
>
> And saw no dirty pages.
Oops.
You will see no dirty pages here anyway --- data written through
write() is commited to the buffer cache directly.
You can loop in each page into the clean_list and check their
"page->buffers" pointer.
If there are dirty buffer_head's there, you can count the page as dirty.
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next prev parent reply other threads:[~2001-05-30 20:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-27 20:20 bert hubert
2001-05-30 19:54 ` Marcelo Tosatti
2001-05-30 21:48 ` bert hubert
2001-05-30 20:27 ` Marcelo Tosatti [this message]
2001-05-31 17:17 ` Ingo Oeser
2001-05-31 21:53 ` bert hubert
2001-06-03 17:04 ` bert hubert
2001-06-04 12:20 ` Hugh Dickins
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