From: Juergen Gross <jgross@suse.com>
To: Igor Druzhinin <igor.druzhinin@citrix.com>,
boris.ostrovsky@oracle.com, xen-devel@lists.xenproject.org,
linux-kernel@vger.kernel.org
Cc: jbeulich@suse.com
Subject: Re: [PATCH] Revert "xen/balloon: Mark unallocated host memory as UNUSABLE"
Date: Thu, 29 Nov 2018 17:55:52 +0100 [thread overview]
Message-ID: <5cbe05c5-352f-32f5-a53e-aef59d8b2f59@suse.com> (raw)
In-Reply-To: <1543352301-29952-1-git-send-email-igor.druzhinin@citrix.com>
On 27/11/2018 21:58, Igor Druzhinin wrote:
> This reverts commit b3cf8528bb21febb650a7ecbf080d0647be40b9f.
>
> That commit unintentionally broke Xen balloon memory hotplug with
> "hotplug_unpopulated" set to 1. As long as "System RAM" resource
> got assigned under a new "Unusable memory" resource in IO/Mem tree
> any attempt to online this memory would fail due to general kernel
> restrictions on having "System RAM" resources as 1st level only.
>
> The original issue that commit has tried to workaround fa564ad96366
> ("x86/PCI: Enable a 64bit BAR on AMD Family 15h (Models 00-1f, 30-3f,
> 60-7f)") also got amended by the following 03a551734 ("x86/PCI: Move
> and shrink AMD 64-bit window to avoid conflict") which made the
> original fix to Xen ballooning unnecessary.
>
> Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Pushed to xen/tip.git for-linus-4.20a
Juergen
prev parent reply other threads:[~2018-11-29 16:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-27 20:58 Igor Druzhinin
2018-11-27 22:42 ` Boris Ostrovsky
2018-11-29 16:55 ` Juergen Gross [this message]
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