From: Paolo Bonzini <pbonzini@redhat.com>
To: Hu Tao <hutao@cn.fujitsu.com>
Cc: Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com>,
Bandan Das <bsd@redhat.com>,
Eduardo Habkost <ehabkost@redhat.com>,
gaowanlong@cn.fujitsu.com, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH v5 05/14] vl: handle "-device dimm"
Date: Tue, 16 Jul 2013 08:19:48 +0200 [thread overview]
Message-ID: <51E4E604.6060608@redhat.com> (raw)
In-Reply-To: <20130716012744.GE10917@G08FNSTD100614.fnst.cn.fujitsu.com>
Il 16/07/2013 03:27, Hu Tao ha scritto:
> > I think it's the same. One "-numa mem" option = one "-device dimm"
> > option; both define one range. Unused memory ranges may remain if you
> > stumble upon a unusable range such as the PCI window. For example two
> > "-numa mem,size=2G" options would allocate memory from 0 to 2G and from
> > 4 to 6G.
>
> So we can drop -dimm if we agree on -numa mem?
Yes, the point of the "-numa mem" proposal was to avoid the concept of a
"partially initialized device" that you had for DIMMs.
BTW, how do you specify which module you are plugging in? I.e., what if
I have three 1G ranges at 0, 1G and 2G, and I want to plug the first and
the third?
This is especially important with hot-unplug, because then you can have
this kind of hole in the address space. If you migrate the VM, you have
to reproduce the situation in the destination command line.
Paolo
next prev parent reply other threads:[~2013-07-16 6:20 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-26 9:13 [Qemu-devel] [PATCH v5 00/14] ACPI memory hotplug Hu Tao
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 01/14] qapi: make visit_type_size fallback to v->type_int() Hu Tao
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 02/14] Add SIZE type to qdev properties Hu Tao
2013-07-08 9:37 ` Andreas Färber
2013-07-12 1:27 ` Hu Tao
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 03/14] qemu-option: export parse_option_number Hu Tao
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 04/14] Implement dimm device abstraction Hu Tao
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 05/14] vl: handle "-device dimm" Hu Tao
2013-06-26 9:46 ` Paolo Bonzini
2013-06-27 5:08 ` Wanlong Gao
2013-06-27 6:55 ` Paolo Bonzini
2013-07-09 16:53 ` Igor Mammedov
2013-07-12 2:39 ` Hu Tao
2013-07-14 16:58 ` Paolo Bonzini
2013-07-16 1:26 ` Hu Tao
2013-07-15 17:05 ` Vasilis Liaskovitis
2013-07-15 17:10 ` Paolo Bonzini
2013-07-15 17:20 ` Vasilis Liaskovitis
2013-07-16 1:27 ` Hu Tao
2013-07-16 6:19 ` Paolo Bonzini [this message]
2013-07-16 7:27 ` Hu Tao
2013-07-16 10:22 ` Igor Mammedov
2013-07-16 10:19 ` Igor Mammedov
2013-07-16 10:31 ` Paolo Bonzini
2013-07-16 12:00 ` Igor Mammedov
2013-07-16 12:17 ` Paolo Bonzini
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 06/14] acpi_piix4 : Implement memory device hotplug registers Hu Tao
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 07/14] acpi_ich9 " Hu Tao
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 08/14] memory: record below_4g_mem_size, above_4g_mem_size Hu Tao
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 09/14] memory controller: initialize dram controller Hu Tao
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 10/14] pc: Add dimm paravirt SRAT info Hu Tao
2013-07-10 10:10 ` Michael S. Tsirkin
2013-07-11 5:13 ` Igor Mammedov
2013-07-11 8:49 ` Michael S. Tsirkin
2013-07-12 1:33 ` Hu Tao
2013-07-14 5:47 ` Michael S. Tsirkin
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 11/14] Introduce paravirt interface QEMU_CFG_PCI_WINDOW Hu Tao
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 12/14] Implement "info memory" and "query-memory" Hu Tao
2013-06-28 20:27 ` Eric Blake
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 13/14] balloon: update with hotplugged memory Hu Tao
2013-06-26 9:13 ` [Qemu-devel] [PATCH v5 14/14] Implement dimm-info Hu Tao
2013-06-28 20:28 ` Eric Blake
2013-06-26 9:14 ` [Qemu-devel] [PATCH v5 0/7] support for ACPI memory hotplug Hu Tao
2013-06-26 9:14 ` [Qemu-devel] [PATCH v5 1/7] Add ACPI_EXTRACT_DEVICE* macros Hu Tao
2013-06-26 9:15 ` [Qemu-devel] [PATCH v5 2/7] Add SSDT memory device support Hu Tao
2013-06-26 9:15 ` [Qemu-devel] [PATCH v5 3/7] acpi-dsdt: Implement functions for memory hotplug Hu Tao
2013-06-26 9:15 ` [Qemu-devel] [PATCH v5 4/7] set psize to 0 when romfile_loadfile failed Hu Tao
2013-06-26 9:15 ` [Qemu-devel] [PATCH v5 5/7] acpi: generate hotplug memory devices Hu Tao
2013-07-12 10:07 ` Igor Mammedov
2013-06-26 9:15 ` [Qemu-devel] [PATCH v5 6/7] q35: Add memory hotplug handler Hu Tao
2013-06-26 9:15 ` [Qemu-devel] [PATCH v5 7/7] pci: Use paravirt interface for pcimem_start and pcimem64_start Hu Tao
2013-07-15 20:11 ` Vasilis Liaskovitis
2013-07-07 8:36 ` [Qemu-devel] [PATCH v5 0/7] support for ACPI memory hotplug Michael S. Tsirkin
2013-07-08 9:48 ` [Qemu-devel] [PATCH v5 00/14] " Andreas Färber
2013-07-12 1:30 ` Hu Tao
2013-07-14 16:56 ` Paolo Bonzini
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