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| author | David Hildenbrand <david@redhat.com> | 2023-09-06 14:05:00 +0200 |
|---|---|---|
| committer | David Hildenbrand <david@redhat.com> | 2023-09-19 10:23:21 +0200 |
| commit | 9e6180d22c482e09e9fac97cf45a09b58109287e (patch) | |
| tree | e43055c6768d06bf2f3d97ec7a679e9af4e72b75 /docs | |
| parent | ca01f1b89b0884e39a58d8bc1d3fbd7ca91272a1 (diff) | |
| download | qemu-9e6180d22c482e09e9fac97cf45a09b58109287e.zip qemu-9e6180d22c482e09e9fac97cf45a09b58109287e.tar.gz qemu-9e6180d22c482e09e9fac97cf45a09b58109287e.tar.bz2 | |
docs: Don't mention "-mem-path" in multi-process.rst
"-mem-path" corresponds to "memory-backend-file,share=off" and,
therefore, creates a private COW mapping of the file. For multi-proces
QEMU, we need proper shared file-backed memory.
Let's make that clearer.
Message-ID: <20230906120503.359863-9-david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/devel/multi-process.rst | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/docs/devel/multi-process.rst b/docs/devel/multi-process.rst index e480175..4ef539c 100644 --- a/docs/devel/multi-process.rst +++ b/docs/devel/multi-process.rst @@ -409,8 +409,9 @@ the initial messages sent to the emulation process is a guest memory table. Each entry in this table consists of a file descriptor and size that the emulation process can ``mmap()`` to directly access guest memory, similar to ``vhost_user_set_mem_table()``. Note guest memory -must be backed by file descriptors, such as when QEMU is given the -*-mem-path* command line option. +must be backed by shared file-backed memory, for example, using +*-object memory-backend-file,share=on* and setting that memory backend +as RAM for the machine. IOMMU operations ^^^^^^^^^^^^^^^^ |