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Re: [Qemu-devel] [PATCH V6 3/5] docs: add pvrdma device documentation.
From: |
Cornelia Huck |
Subject: |
Re: [Qemu-devel] [PATCH V6 3/5] docs: add pvrdma device documentation. |
Date: |
Tue, 9 Jan 2018 10:17:48 +0100 |
On Sun, 7 Jan 2018 14:32:22 +0200
Marcel Apfelbaum <address@hidden> wrote:
> Signed-off-by: Marcel Apfelbaum <address@hidden>
> Signed-off-by: Yuval Shaia <address@hidden>
> Reviewed-by: Shamir Rabinovitch <address@hidden>
> ---
> docs/pvrdma.txt | 254
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 254 insertions(+)
> create mode 100644 docs/pvrdma.txt
> +5. Limitations
> +==============
> +- The device obviously is limited by the Guest Linux Driver features
> implementation
> + of the VMware device API.
> +- Memory registration mechanism requires mremap for every page in the buffer
> in order
> + to map it to a contiguous virtual address range. Since this is not the
> data path
> + it should not matter much.
> +- The device requires target page size to be the same as the host page size.
> +- QEMU cannot map guest RAM from a file descriptor if a pvrdma device is
> attached,
> + so it can't work with huge pages. The limitation will be addressed in the
> future,
> + however QEMU allocates Gust RAM with MADV_HUGEPAGE so if there are enough
> huge
s/Gust/Guest/
> + pages available, QEMU will use them.
> +- As previously stated, migration is not supported yet, however with some
> hardware
> + support can be done.
- [Qemu-devel] [PATCH V6 0/5] hw/pvrdma: PVRDMA device implementation, Marcel Apfelbaum, 2018/01/07
- [Qemu-devel] [PATCH V6 1/5] pci/shpc: Move function to generic header file, Marcel Apfelbaum, 2018/01/07
- [Qemu-devel] [PATCH V6 2/5] mem: add share parameter to memory-backend-ram, Marcel Apfelbaum, 2018/01/07
- [Qemu-devel] [PATCH V6 3/5] docs: add pvrdma device documentation., Marcel Apfelbaum, 2018/01/07
- Re: [Qemu-devel] [PATCH V6 3/5] docs: add pvrdma device documentation.,
Cornelia Huck <=
- [Qemu-devel] [PATCH V6 5/5] MAINTAINERS: add entry for hw/rdma, Marcel Apfelbaum, 2018/01/07
- [Qemu-devel] [PATCH V6 4/5] pvrdma: initial implementation, Marcel Apfelbaum, 2018/01/07
- Re: [Qemu-devel] [PATCH V6 4/5] pvrdma: initial implementation, Marcel Apfelbaum, 2018/01/10