linux-kernel - Re: [PATCH v2 00/10] virtio-mem: paravirtualized memory

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Message-ID: <11c87dee-e94e-0475-76d2-143adfd50d9d@redhat.com>
Date:   Mon, 30 Mar 2020 10:42:47 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Pankaj Gupta <pankaj.gupta.linux@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        virtio-dev@...ts.oasis-open.org,
        virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
        Michal Hocko <mhocko@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Sebastien Boeuf <sebastien.boeuf@...el.com>,
        Samuel Ortiz <samuel.ortiz@...el.com>,
        Robert Bradford <robert.bradford@...el.com>,
        Luiz Capitulino <lcapitulino@...hat.com>,
        teawater <teawaterz@...ux.alibaba.com>,
        Igor Mammedov <imammedo@...hat.com>,
        "Dr . David Alan Gilbert" <dgilbert@...hat.com>,
        Alexander Duyck <alexander.h.duyck@...ux.intel.com>,
        Alexander Potapenko <glider@...gle.com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Anthony Yznaga <anthony.yznaga@...cle.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Young <dyoung@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Juergen Gross <jgross@...e.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Len Brown <lenb@...nel.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Michal Hocko <mhocko@...e.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Oscar Salvador <osalvador@...e.com>,
        Oscar Salvador <osalvador@...e.de>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        Pavel Tatashin <pavel.tatashin@...rosoft.com>,
        Pingfan Liu <kernelfans@...il.com>, Qian Cai <cai@....pw>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Wei Yang <richard.weiyang@...il.com>
Subject: Re: [PATCH v2 00/10] virtio-mem: paravirtualized memory

On 29.03.20 17:41, Pankaj Gupta wrote:
>>> Hi David,
>>>
>>> Trying to test the series with the Qemu branch(virtio-mem) mentioned.
>>> Unfortunately,
>>> not able to hotplug memory. Is anything changed from your previous posting
>>> or I am doing something wrong?
>>>
>>> After giving value to "requested-size", I see size as zero.
>>>
>>> (qemu) qom-set vm0 requested-size 10G
>>> (qemu) info memory-devices
>>> Memory device [virtio-mem]: "vm0"
>>>   memaddr: 0x240000000
>>>   node: 0
>>>   requested-size: 10737418240
>>>   size: 0
>>>   max-size: 107374182400
>>>   block-size: 2097152
>>>   memdev: /objects/mem0
>>>
>>> Guest kernel: 5.6.0-rc4
>>> Using same Qemu commandline arguments mentioned in cover-letter.
>>
>> Are you booting from an initrd? Are you compiling virtio-mem as a kernel
>> module or into the kernel binary?
> Ah was booting into wrong kernel version. Sorry! for the noise.
> 
> Working perfectly for me. Tried various cmbinations for both
> hotplug/unplug with multiple
> NUMA nodes and verified result in guest.
> 
> For the series, you can add:
> Tested-by: Pankaj Gupta <pankaj.gupta.linux@...il.com>

Awesome, thanks!

-- 
Thanks,

David / dhildenb