linux-kernel - Re: [PATCH] xen/balloon: fix ballooned page accounting without hotplug enabled

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Date:   Thu, 12 Dec 2019 13:30:04 -0500
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Juergen Gross <jgross@...e.com>, xen-devel@...ts.xenproject.org,
        linux-kernel@...r.kernel.org
Cc:     Stefano Stabellini <sstabellini@...nel.org>
Subject: Re: [PATCH] xen/balloon: fix ballooned page accounting without
 hotplug enabled



On 12/12/19 9:17 AM, Juergen Gross wrote:
> When CONFIG_XEN_BALLOON_MEMORY_HOTPLUG is not defined
> reserve_additional_memory() will set balloon_stats.target_pages to a
> wrong value in case there are still some ballooned pages allocated via
> alloc_xenballooned_pages().
>
> This will result in balloon_process() no longer be triggered when
> ballooned pages are freed in batches.
>
> Reported-by: Nicholas Tsirakis <niko.tsirakis@...il.com>
> Signed-off-by: Juergen Gross <jgross@...e.com>

Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>