linux-kernel - Re: [PATCH] xen: fix booting ballooned down hvm guest

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Message-ID: <8b419db3-8753-be6c-c938-1e2adb210770@oracle.com>
Date:   Tue, 24 Oct 2017 10:56:26 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Juergen Gross <jgross@...e.com>, linux-kernel@...r.kernel.org,
        xen-devel@...ts.xenproject.org
Cc:     hw42@...umj.de, stable@...r.kernel.org
Subject: Re: [PATCH] xen: fix booting ballooned down hvm guest

On 10/24/2017 10:41 AM, Juergen Gross wrote:
> On 24/10/17 16:33, Boris Ostrovsky wrote:
>> On 10/24/2017 04:10 AM, Juergen Gross wrote:
>>> Commit 96edd61dcf44362d3ef0bed1a5361e0ac7886a63 ("xen/balloon: don't
>>> online new memory initially") introduced a regression when booting a
>>> HVM domain with memory less than mem-max: instead of ballooning down
>>> immediately the system would try to use the memory up to mem-max
>>> resulting in Xen crashing the domain.
>>>
>>> For HVM domains the current size will be reflected in Xenstore node
>>> memory/static-max instead of memory/target.
>>>
>>> Additionally we have to trigger the ballooning process at once.
>>>
>>> Cc: <stable@...r.kernel.org> # 4.13
>>> Fixes: 96edd61dcf44362d3ef0bed1a5361e0ac7886a63 ("xen/balloon: don't
>>>        online new memory initially")
>>>
>>> Suggested-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>
>>> Signed-off-by: Juergen Gross <jgross@...e.com>
>> Reported-by: HW42 <hw42@...umj.de>
> Hmm, is an anonymous Reported-by: tag okay?

Oh, I don't know what the rules are for this kind of address. I'd
probably still add it but it's up to you.

-boris