linux-kernel - Re: maybe revert commit c275a57f5ec3 "xen/balloon: Set balloon's initial state to number of existing RAM pages"

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Message-ID: <c7cbd3c7-5785-a3cc-ca28-a289ebe1cb4f@oracle.com>
Date:   Fri, 24 Mar 2017 21:33:07 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Dan Streetman <dan.streetman@...onical.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:     Juergen Gross <jgross@...e.com>, xen-devel@...ts.xenproject.org,
        linux-kernel@...r.kernel.org
Subject: Re: maybe revert commit c275a57f5ec3 "xen/balloon: Set balloon's
 initial state to number of existing RAM pages"


>
> I think we can all agree that the *ideal* situation would be, for the
> balloon driver to not immediately hotplug memory so it can add 11 more
> pages, so maybe I just need to figure out why the balloon driver
> thinks it needs 11 more pages, and fix that.


How does the new memory appear in the guest? Via online_pages()?

Or is ballooning triggered from watch_target()?

-boris