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[Qemu-devel] [PATCH 1/2] qemu-options: document missing memory-backend-f


From: Stefan Hajnoczi
Subject: [Qemu-devel] [PATCH 1/2] qemu-options: document missing memory-backend-file options
Date: Tue, 28 Nov 2017 16:15:28 +0000

This patch adds undocumented memory-backend-file options to the
documentation.

Signed-off-by: Stefan Hajnoczi <address@hidden>
---
 qemu-options.hx | 48 +++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 41 insertions(+), 7 deletions(-)

diff --git a/qemu-options.hx b/qemu-options.hx
index 3728e9b4dd..f2cf0be193 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -4189,18 +4189,24 @@ property must be set.  These objects are placed in the
 
 @table @option
 
address@hidden -object 
memory-backend-file,address@hidden,address@hidden,address@hidden,address@hidden|off},address@hidden|off}
address@hidden -object 
memory-backend-file,address@hidden,address@hidden,address@hidden,address@hidden|off},address@hidden|off},address@hidden|off},address@hidden|off},address@hidden|off},address@hidden,address@hidden|preferred|bind|interleave}
 
 Creates a memory file backend object, which can be used to back
-the guest RAM with huge pages. The @option{id} parameter is a
-unique ID that will be used to reference this memory region
-when configuring the @option{-numa} argument. The @option{size}
-option provides the size of the memory region, and accepts
-common suffixes, eg @option{500M}. The @option{mem-path} provides
-the path to either a shared memory or huge page filesystem mount.
+the guest RAM with huge pages.
+
+The @option{id} parameter is a unique ID that will be used to reference this
+memory region when configuring the @option{-numa} argument.
+
+The @option{size} option provides the size of the memory region, and accepts
+common suffixes, eg @option{500M}.
+
+The @option{mem-path} provides the path to either a shared memory or huge page
+filesystem mount.
+
 The @option{share} boolean option determines whether the memory
 region is marked as private to QEMU, or shared. The latter allows
 a co-operating external process to access the QEMU memory region.
+
 Setting the @option{discard-data} boolean option to @var{on}
 indicates that file contents can be destroyed when QEMU exits,
 to avoid unnecessarily flushing data to the backing file.  Note
@@ -4208,6 +4214,34 @@ that @option{discard-data} is only an optimization, and 
QEMU
 might not discard file contents if it aborts unexpectedly or is
 terminated using SIGKILL.
 
+The @option{merge} boolean option enables memory merge, also known as
+MADV_MERGEABLE, so that Kernel Samepage Merging will consider the pages for
+memory deduplication.
+
+Setting the @option{dump} boolean option to @var{off} excludes the memory from
+core dumps. This feature is also known as MADV_DONTDUMP.
+
+The @option{prealloc} boolean option enables memory preallocation.
+
+The @option{host-nodes} option binds the memory range to a list of NUMA host
+nodes.
+
+The @option{policy} option sets the NUMA policy to one of the following values:
+
address@hidden @option
address@hidden @var{default}
+default host policy
+
address@hidden @var{preferred}
+prefer the given host node list for allocation
+
address@hidden @var{bind}
+restrict memory allocation to the given host node list
+
address@hidden @var{interleave}
+interleave memory allocations across the given host node list
address@hidden table
+
 @item -object rng-random,address@hidden,address@hidden/dev/random}
 
 Creates a random number generator backend which obtains entropy from
-- 
2.14.3




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