linux-kernel - Re: [PATCH v4 00/15] virtio-mem: paravirtualized memory

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Message-Id: <2603F9B2-17D0-4A05-A82B-2D3B9671A96E@linux.alibaba.com>
Date:   Wed, 20 May 2020 13:25:29 +0800
From:   teawater <teawaterz@...ux.alibaba.com>
To:     David Hildenbrand <david@...hat.com>
Cc:     LKML <linux-kernel@...r.kernel.org>, Linux MM <linux-mm@...ck.org>,
        virtio-dev@...ts.oasis-open.org,
        Linux Virtualization <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>,
        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>,
        Igor Mammedov <imammedo@...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>,
        Pankaj Gupta <pankaj.gupta.linux@...il.com>,
        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 v4 00/15] virtio-mem: paravirtualized memory

Hi David,

Thanks for your work.
I tried this version with cloud-hypervisor master.  It worked very well.

Best,
Hui

> 2020年5月7日 22:01，David Hildenbrand <david@...hat.com> 写道：
> 
> This series is based on v5.7-rc4. The patches are located at:
>    https://github.com/davidhildenbrand/linux.git virtio-mem-v4
> 
> This is basically a resend of v3 [1], now based on v5.7-rc4 and restested.
> One patch was reshuffled and two ACKs I missed to add were added. The
> rebase did not require any modifications to patches.
> 
> Details about virtio-mem can be found in the cover letter of v2 [2]. A
> basic QEMU implementation was posted yesterday [3].
> 
> [1] https://lkml.kernel.org/r/20200507103119.11219-1-david@redhat.com
> [2] https://lkml.kernel.org/r/20200311171422.10484-1-david@redhat.com
> [3] https://lkml.kernel.org/r/20200506094948.76388-1-david@redhat.com
> 
> v3 -> v4:
> - Move "MAINTAINERS: Add myself as virtio-mem maintainer" to #2
> - Add two ACKs from Andrew (in reply to v2)
> -- "mm: Allow to offline unmovable PageOffline() pages via ..."
> -- "mm/memory_hotplug: Introduce offline_and_remove_memory()"
> 
> v2 -> v3:
> - "virtio-mem: Paravirtualized memory hotplug"
> -- Include "linux/slab.h" to fix build issues
> -- Remember the "region_size", helpful for patch #11
> -- Minor simplifaction in virtio_mem_overlaps_range()
> -- Use notifier_from_errno() instead of notifier_to_errno() in notifier
> -- More reliable check for added memory when unloading the driver
> - "virtio-mem: Allow to specify an ACPI PXM as nid"
> -- Also print the nid
> - Added patch #11-#15
> 
> David Hildenbrand (15):
>  virtio-mem: Paravirtualized memory hotplug
>  MAINTAINERS: Add myself as virtio-mem maintainer
>  virtio-mem: Allow to specify an ACPI PXM as nid
>  virtio-mem: Paravirtualized memory hotunplug part 1
>  virtio-mem: Paravirtualized memory hotunplug part 2
>  mm: Allow to offline unmovable PageOffline() pages via
>    MEM_GOING_OFFLINE
>  virtio-mem: Allow to offline partially unplugged memory blocks
>  mm/memory_hotplug: Introduce offline_and_remove_memory()
>  virtio-mem: Offline and remove completely unplugged memory blocks
>  virtio-mem: Better retry handling
>  virtio-mem: Add parent resource for all added "System RAM"
>  virtio-mem: Drop manual check for already present memory
>  virtio-mem: Unplug subblocks right-to-left
>  virtio-mem: Use -ETXTBSY as error code if the device is busy
>  virtio-mem: Try to unplug the complete online memory block first
> 
> MAINTAINERS                     |    7 +
> drivers/acpi/numa/srat.c        |    1 +
> drivers/virtio/Kconfig          |   17 +
> drivers/virtio/Makefile         |    1 +
> drivers/virtio/virtio_mem.c     | 1962 +++++++++++++++++++++++++++++++
> include/linux/memory_hotplug.h  |    1 +
> include/linux/page-flags.h      |   10 +
> include/uapi/linux/virtio_ids.h |    1 +
> include/uapi/linux/virtio_mem.h |  208 ++++
> mm/memory_hotplug.c             |   81 +-
> mm/page_alloc.c                 |   26 +
> mm/page_isolation.c             |    9 +
> 12 files changed, 2314 insertions(+), 10 deletions(-)
> create mode 100644 drivers/virtio/virtio_mem.c
> create mode 100644 include/uapi/linux/virtio_mem.h
> 
> -- 
> 2.25.3