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From: Joel Fernandes <joelaf@google.com>
To: Christian Hansen <chansen3@cisco.com>,
	"open list:MEMORY MANAGEMENT" <linux-mm@kvack.org>,
	 Andrew Morton <akpm@linux-foundation.org>
Subject: idle-page marking in page-types tool
Date: Fri, 15 Mar 2019 08:32:18 -0700	[thread overview]
Message-ID: <CAJWu+ort=_YTh2B=y7iPuhFGVAP2joJugNrmgg3K0yun4uPFQQ@mail.gmail.com> (raw)

Hi Christian,
I am looking into idle page tracking and noticed the page-types tool
in tools/vm/. It seems you are only marking pages as idle if the -f
option is passed ("Walk file address space").

I was curious why you decided do the marking of idle pages only for
files and not anonymous pages?
As doing in the following code:
        if (opt_mark_idle && opt_file)
                page_idle_fd = checked_open(SYS_KERNEL_MM_PAGE_IDLE, O_RDWR);

We mainly want to do idle page tracking for anonymous regions to
determine howmuch  of its anonymous memory is a process really using
actively.

But I was curious what was the reason you did it this way?

thanks,
 - Joel


             reply	other threads:[~2019-03-15 15:32 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-15 15:32 Joel Fernandes [this message]
2019-03-25  3:10 ` Joel Fernandes

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