From: David Hildenbrand Date: Wed, 6 Sep 2023 12:05:00 +0000 (+0200) Subject: docs: Don't mention "-mem-path" in multi-process.rst X-Git-Tag: pull-xenfv-stable-20231106~89^2~4 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=9e6180d22c482e09e9fac97cf45a09b58109287e;p=users%2Fdwmw2%2Fqemu.git 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 --- diff --git a/docs/devel/multi-process.rst b/docs/devel/multi-process.rst index e4801751f2..4ef539c0b0 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 ^^^^^^^^^^^^^^^^