From: Paolo Bonzini <pbonzini@redhat.com>
To: Xiao Guangrong <guangrong.xiao@linux.intel.com>,
Stefan Hajnoczi <stefanha@gmail.com>
Cc: ehabkost@redhat.com, kvm@vger.kernel.org, mst@redhat.com,
gleb@kernel.org, mtosatti@redhat.com, qemu-devel@nongnu.org,
stefanha@redhat.com, imammedo@redhat.com, rth@twiddle.net
Subject: Re: [PATCH v2 08/18] nvdimm: init backend memory mapping and config data area
Date: Tue, 15 Sep 2015 18:07:22 +0200 [thread overview]
Message-ID: <55F8423A.3020600@redhat.com> (raw)
In-Reply-To: <55DD979A.70804@linux.intel.com>
On 26/08/2015 12:40, Xiao Guangrong wrote:
>>>
>>> +
>>> + size = get_file_size(fd);
>>> + buf = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
>>
>> I guess the user will want to choose between MAP_SHARED and MAP_PRIVATE.
>> This can be added in the future.
>
> Good idea, it will allow guest to write data but discards its content
> after it exits. Will implement O_RDONLY + MAP_PRIVATE in the near future.
FWIW, if Igor's backend/frontend idea is implemented, the choice between
MAP_SHARED and MAP_PRIVATE should belong in the backend.
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Xiao Guangrong <guangrong.xiao@linux.intel.com>,
Stefan Hajnoczi <stefanha@gmail.com>
Cc: ehabkost@redhat.com, kvm@vger.kernel.org, mst@redhat.com,
gleb@kernel.org, mtosatti@redhat.com, qemu-devel@nongnu.org,
stefanha@redhat.com, imammedo@redhat.com, rth@twiddle.net
Subject: Re: [Qemu-devel] [PATCH v2 08/18] nvdimm: init backend memory mapping and config data area
Date: Tue, 15 Sep 2015 18:07:22 +0200 [thread overview]
Message-ID: <55F8423A.3020600@redhat.com> (raw)
In-Reply-To: <55DD979A.70804@linux.intel.com>
On 26/08/2015 12:40, Xiao Guangrong wrote:
>>>
>>> +
>>> + size = get_file_size(fd);
>>> + buf = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
>>
>> I guess the user will want to choose between MAP_SHARED and MAP_PRIVATE.
>> This can be added in the future.
>
> Good idea, it will allow guest to write data but discards its content
> after it exits. Will implement O_RDONLY + MAP_PRIVATE in the near future.
FWIW, if Igor's backend/frontend idea is implemented, the choice between
MAP_SHARED and MAP_PRIVATE should belong in the backend.
Paolo
next prev parent reply other threads:[~2015-09-15 16:07 UTC|newest]
Thread overview: 164+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-14 14:51 [PATCH v2 00/18] implement vNVDIMM Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:51 ` [PATCH v2 01/18] acpi: allow aml_operation_region() working on 64 bit offset Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-09-02 8:05 ` Igor Mammedov
2015-09-02 8:05 ` [Qemu-devel] " Igor Mammedov
2015-08-14 14:51 ` [PATCH v2 02/18] i386/acpi-build: allow SSDT to operate on 64 bit Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-09-02 10:06 ` Igor Mammedov
2015-09-02 10:06 ` [Qemu-devel] " Igor Mammedov
2015-09-02 10:43 ` Xiao Guangrong
2015-09-02 11:42 ` Igor Mammedov
2015-09-06 7:01 ` Xiao Guangrong
2015-09-02 12:05 ` Michael S. Tsirkin
2015-09-02 12:05 ` [Qemu-devel] " Michael S. Tsirkin
2015-08-14 14:51 ` [PATCH v2 03/18] acpi: add aml_derefof Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-09-02 10:16 ` Igor Mammedov
2015-09-02 10:16 ` [Qemu-devel] " Igor Mammedov
2015-09-02 10:38 ` Xiao Guangrong
2015-09-02 10:38 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:51 ` [PATCH v2 04/18] acpi: add aml_sizeof Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-09-02 10:18 ` Igor Mammedov
2015-09-02 10:18 ` [Qemu-devel] " Igor Mammedov
2015-09-02 10:39 ` Xiao Guangrong
2015-09-02 10:39 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:51 ` [PATCH v2 05/18] acpi: add aml_create_field Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-09-02 11:10 ` Igor Mammedov
2015-09-02 11:10 ` [Qemu-devel] " Igor Mammedov
2015-09-06 5:32 ` Xiao Guangrong
2015-09-06 5:32 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:51 ` [PATCH v2 06/18] pc: implement NVDIMM device abstract Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 14:57 ` Stefan Hajnoczi
2015-08-25 14:57 ` Stefan Hajnoczi
2015-08-26 9:37 ` Xiao Guangrong
2015-08-26 9:37 ` Xiao Guangrong
2015-09-02 9:58 ` Igor Mammedov
2015-09-02 9:58 ` Igor Mammedov
2015-09-02 10:36 ` Xiao Guangrong
2015-09-02 10:36 ` Xiao Guangrong
2015-09-02 11:31 ` Igor Mammedov
2015-09-02 11:31 ` Igor Mammedov
2015-09-06 6:07 ` Xiao Guangrong
2015-09-06 6:07 ` Xiao Guangrong
2015-09-07 13:40 ` Igor Mammedov
2015-09-07 13:40 ` Igor Mammedov
2015-09-08 14:03 ` Xiao Guangrong
2015-09-10 9:47 ` Igor Mammedov
2015-08-14 14:52 ` [PATCH v2 07/18] nvdimm: reserve address range for NVDIMM Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 15:12 ` Stefan Hajnoczi
2015-08-25 15:12 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-26 9:39 ` Xiao Guangrong
2015-08-26 9:40 ` Xiao Guangrong
2015-08-26 9:40 ` Xiao Guangrong
2015-08-25 15:39 ` Stefan Hajnoczi
2015-08-25 15:39 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-28 17:25 ` Eduardo Habkost
2015-08-28 17:25 ` [Qemu-devel] " Eduardo Habkost
2015-08-31 7:01 ` Xiao Guangrong
2015-08-31 7:01 ` [Qemu-devel] " Xiao Guangrong
2015-09-04 12:02 ` Igor Mammedov
2015-09-04 12:02 ` [Qemu-devel] " Igor Mammedov
2015-09-06 7:22 ` Xiao Guangrong
2015-09-06 7:22 ` Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 08/18] nvdimm: init backend memory mapping and config data area Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 16:03 ` Stefan Hajnoczi
2015-08-25 16:03 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-26 10:40 ` Xiao Guangrong
2015-08-26 10:40 ` [Qemu-devel] " Xiao Guangrong
2015-08-28 11:58 ` Stefan Hajnoczi
2015-08-28 11:58 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-31 6:23 ` Xiao Guangrong
2015-08-31 6:23 ` [Qemu-devel] " Xiao Guangrong
2015-09-01 9:14 ` Stefan Hajnoczi
2015-09-01 9:14 ` [Qemu-devel] " Stefan Hajnoczi
2015-09-15 16:10 ` Paolo Bonzini
2015-09-15 16:10 ` [Qemu-devel] " Paolo Bonzini
2015-09-17 8:39 ` Xiao Guangrong
2015-09-17 8:39 ` [Qemu-devel] " Xiao Guangrong
2015-09-17 9:04 ` Igor Mammedov
2015-09-17 9:04 ` [Qemu-devel] " Igor Mammedov
2015-09-17 9:14 ` Xiao Guangrong
2015-09-17 9:14 ` [Qemu-devel] " Xiao Guangrong
2015-09-17 9:34 ` Paolo Bonzini
2015-09-17 9:34 ` [Qemu-devel] " Paolo Bonzini
2015-09-17 12:43 ` Xiao Guangrong
2015-09-15 16:07 ` Paolo Bonzini [this message]
2015-09-15 16:07 ` Paolo Bonzini
2015-09-17 8:23 ` Xiao Guangrong
2015-09-17 8:23 ` [Qemu-devel] " Xiao Guangrong
2015-09-15 16:06 ` Paolo Bonzini
2015-09-15 16:06 ` [Qemu-devel] " Paolo Bonzini
2015-09-17 8:21 ` Xiao Guangrong
2015-09-17 8:21 ` [Qemu-devel] " Xiao Guangrong
2015-09-07 14:11 ` Igor Mammedov
2015-09-07 14:11 ` Igor Mammedov
2015-09-08 13:38 ` Xiao Guangrong
2015-09-10 10:35 ` Igor Mammedov
2015-09-15 16:11 ` Paolo Bonzini
2015-08-14 14:52 ` [PATCH v2 09/18] nvdimm: build ACPI NFIT table Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-09-15 16:12 ` Paolo Bonzini
2015-09-15 16:12 ` [Qemu-devel] " Paolo Bonzini
2015-09-15 17:35 ` Igor Mammedov
2015-09-15 17:35 ` [Qemu-devel] " Igor Mammedov
2015-08-14 14:52 ` [PATCH v2 10/18] nvdimm: init the address region used by DSM method Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 16:11 ` Stefan Hajnoczi
2015-08-25 16:11 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-26 10:41 ` Xiao Guangrong
2015-08-26 10:41 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 11/18] nvdimm: build ACPI nvdimm devices Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 12/18] nvdimm: save arg3 for NVDIMM device _DSM method Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 13/18] nvdimm: build namespace config data Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 16:16 ` Stefan Hajnoczi
2015-08-25 16:16 ` Stefan Hajnoczi
2015-08-26 10:42 ` Xiao Guangrong
2015-08-26 10:42 ` Xiao Guangrong
2015-08-28 11:59 ` Stefan Hajnoczi
2015-08-28 11:59 ` Stefan Hajnoczi
2015-08-31 6:25 ` Xiao Guangrong
2015-08-31 6:25 ` Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 14/18] nvdimm: support NFIT_CMD_IMPLEMENTED function Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 16:23 ` Stefan Hajnoczi
2015-08-25 16:23 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-26 10:46 ` Xiao Guangrong
2015-08-26 10:46 ` [Qemu-devel] " Xiao Guangrong
2015-08-28 12:01 ` Stefan Hajnoczi
2015-08-28 12:01 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-31 6:51 ` Xiao Guangrong
2015-08-31 6:51 ` Xiao Guangrong
2015-09-01 9:16 ` Stefan Hajnoczi
2015-09-01 9:16 ` Stefan Hajnoczi
2015-08-14 14:52 ` [PATCH v2 15/18] nvdimm: support NFIT_CMD_GET_CONFIG_SIZE function Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 16:24 ` Stefan Hajnoczi
2015-08-25 16:24 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-26 10:47 ` Xiao Guangrong
2015-08-26 10:47 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 16/18] nvdimm: support NFIT_CMD_GET_CONFIG_DATA Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 17/18] nvdimm: support NFIT_CMD_SET_CONFIG_DATA Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 18/18] nvdimm: add maintain info Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 16:26 ` [Qemu-devel] [PATCH v2 00/18] implement vNVDIMM Stefan Hajnoczi
2015-08-25 16:26 ` Stefan Hajnoczi
2015-08-26 10:49 ` Xiao Guangrong
2015-08-26 10:49 ` Xiao Guangrong
2015-10-07 14:02 ` Stefan Hajnoczi
2015-10-07 14:02 ` Stefan Hajnoczi
2015-10-07 14:43 ` Xiao Guangrong
2015-10-07 14:43 ` Xiao Guangrong
2015-10-09 10:38 ` Stefan Hajnoczi
2015-10-09 10:38 ` Stefan Hajnoczi
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