Re: [PATCH v2 4/4] Update documentation to reflect memory_backing_dir change in qemu.conf

From: Michael Galaxy <mgalaxy(a)akamai.com&gt; Update the documentation and changelog accordingly to reflect that the syntax of the memory_backing_dir setting has changed. Signed-off-by: Michael Galaxy <mgalaxy(a)akamai.com&gt; --- NEWS.rst | 7 +++++++ docs/kbase/virtiofs.rst | 2 ++ src/qemu/qemu.conf.in | 2 ++ 3 files changed, 11 insertions(+) diff --git a/NEWS.rst b/NEWS.rst index f3ca29443a..64be9a9509 100644 --- a/NEWS.rst +++ b/NEWS.rst @@ -54,6 +54,13 @@ v10.4.0 (2024-06-03) ebtables/iptables). * **Improvements** + * qemu: memory backing directories now support NUMA + + The primary use case of this is when persistent memory is used on + NUMA-aware systems. The setting ``memory_backing_dir`` in qemu.conf + now supports either an array or the original string. This allows + you to provide a array of locations to use that are NUMA-compatible + if needed. * qemu: add zstd to supported compression formats

diff --git a/docs/kbase/virtiofs.rst b/docs/kbase/virtiofs.rst index 457c15da7f..931ba96104 100644 --- a/docs/kbase/virtiofs.rst +++ b/docs/kbase/virtiofs.rst @@ -144,6 +144,8 @@ memobject interface). # This directory is used for memoryBacking source if configured as file. # NOTE: big files will be stored here + # NOTE: In the case of a NUMA-aware system (such has shm/tmpfs or PMEM), + # one can also do: memory_backing_dir = [ "/path/to/node/0", "/path/to/node/1" ] memory_backing_dir = "/dev/shm/" * Use hugepage-backed memory diff --git a/src/qemu/qemu.conf.in b/src/qemu/qemu.conf.in index 6bc2140dcb..e6d1f8a675 100644 --- a/src/qemu/qemu.conf.in +++ b/src/qemu/qemu.conf.in @@ -897,6 +897,8 @@ # This directory is used for memoryBacking source if configured as file. # NOTE: big files will be stored here +# NOTE: In the case of a NUMA-aware system (such has shm/tmpfs or PMEM), +# one can also do: memory_backing_dir = [ "/path/to/node/0", "/path/to/node/1" ]

#memory_backing_dir = "/var/lib/libvirt/qemu/ram" # Path to the SCSI persistent reservations helper. This helper is -- 2.34.1