From: Matthew Wilcox <willy@infradead.org>
To: Wei Yang <richardw.yang@linux.intel.com>
Cc: linux-mm@kvack.org
Subject: Re: Why sometimes count vm event with page number, sometimes not?
Date: Mon, 4 Nov 2019 19:32:51 -0800 [thread overview]
Message-ID: <20191105033251.GB11823@bombadil.infradead.org> (raw)
In-Reply-To: <20191105022643.GA14722@richard>
On Tue, Nov 05, 2019 at 10:26:44AM +0800, Wei Yang wrote:
> Hi, All,
>
> I am curious about the semantic of __count_vm_event[s].
>
> For example, we count PGDEACTIVATE event in lru_deactivate_file_fn() and
> lru_deactivate_fn(). One of them count with number of page, the other not.
>
> Just curious about the exact value we want to count.
I don't understand the question. We deactivate one page
in lru_deactivate_file_fn(). We deactivate several pages in
shrink_active_list(). PGDEACTIVATE counts the number of pages which
have been deactivated.
Does that answer your question?
next prev parent reply other threads:[~2019-11-05 3:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-05 2:26 Wei Yang
2019-11-05 3:32 ` Matthew Wilcox [this message]
2019-11-05 6:28 ` Wei Yang
2019-11-05 15:40 ` Vlastimil Babka
2019-11-05 20:49 ` Hugh Dickins
2019-11-06 0:28 ` Wei Yang
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