The QMP command let it be able to set node's memory policy through the QMP protocol. The qmp-shell command is like: set-mpol nodeid=0 mem-policy=membind mem-hostnode=0-1
Signed-off-by: Wanlong Gao <gaowanl...@cn.fujitsu.com> --- cpus.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ qapi-schema.json | 15 +++++++++++++++ qmp-commands.hx | 35 +++++++++++++++++++++++++++++++++++ 3 files changed, 104 insertions(+) diff --git a/cpus.c b/cpus.c index 677ee15..9c2706c 100644 --- a/cpus.c +++ b/cpus.c @@ -1432,3 +1432,57 @@ void qmp_inject_nmi(Error **errp) error_set(errp, QERR_UNSUPPORTED); #endif } + +void qmp_set_mpol(int64_t nodeid, bool has_mpol, const char *mpol, + bool has_hostnode, const char *hostnode, Error **errp) +{ + unsigned int flags; + DECLARE_BITMAP(host_mem, MAX_CPUMASK_BITS); + + if (nodeid >= nb_numa_nodes) { + error_setg(errp, "Only has '%d' NUMA nodes", nb_numa_nodes); + return; + } + + bitmap_copy(host_mem, numa_info[nodeid].host_mem, MAX_CPUMASK_BITS); + flags = numa_info[nodeid].flags; + + numa_info[nodeid].flags = NODE_HOST_NONE; + bitmap_zero(numa_info[nodeid].host_mem, MAX_CPUMASK_BITS); + + if (!has_mpol) { + if (set_node_mpol(nodeid) == -1) { + error_setg(errp, "Failed to set memory policy for node%lu", nodeid); + goto error; + } + return; + } + + numa_node_parse_mpol(nodeid, mpol, errp); + if (error_is_set(errp)) { + goto error; + } + + if (!has_hostnode) { + bitmap_fill(numa_info[nodeid].host_mem, MAX_CPUMASK_BITS); + } + + if (hostnode) { + numa_node_parse_hostnode(nodeid, hostnode, errp); + if (error_is_set(errp)) { + goto error; + } + } + + if (set_node_mpol(nodeid) == -1) { + error_setg(errp, "Failed to set memory policy for node%lu", nodeid); + goto error; + } + + return; + +error: + bitmap_copy(numa_info[nodeid].host_mem, host_mem, MAX_CPUMASK_BITS); + numa_info[nodeid].flags = flags; + return; +} diff --git a/qapi-schema.json b/qapi-schema.json index a80ee40..cedcbe1 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -3608,3 +3608,18 @@ '*cpuid-input-ecx': 'int', 'cpuid-register': 'X86CPURegister32', 'features': 'int' } } + +# @set-mpol: +# +# Set the host memory binding policy for guest NUMA node. +# +# @nodeid: The node ID of guest NUMA node to set memory policy to. +# +# @mem-policy: The memory policy string to set. +# +# @mem-hostnode: The host node or node range for memory policy. +# +# Since: 1.6.0 +## +{ 'command': 'set-mpol', 'data': {'nodeid': 'int', '*mem-policy': 'str', + '*mem-hostnode': 'str'} } diff --git a/qmp-commands.hx b/qmp-commands.hx index 8cea5e5..7bb5038 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -2997,3 +2997,38 @@ Example: <- { "return": {} } EQMP + + { + .name = "set-mpol", + .args_type = "nodeid:i,mem-policy:s?,mem-hostnode:s?", + .help = "Set the host memory binding policy for guest NUMA node", + .mhandler.cmd_new = qmp_marshal_input_set_mpol, + }, + +SQMP +set-mpol +------ + +Set the host memory binding policy for guest NUMA node + +Arguments: + +- "nodeid": The nodeid of guest NUMA node to set memory policy to. + (json-int) +- "mem-policy": The memory policy string to set. + (json-string, optional) +- "mem-hostnode": The host nodes contained to mpol. + (json-string, optional) + +Example: + +-> { "execute": "set-mpol", "arguments": { "nodeid": 0, "mem-policy": "membind", + "mem-hostnode": "0-1" }} +<- { "return": {} } + +Notes: + 1. If "mem-policy" is not set, the memory policy of this "nodeid" will be set + to "default". + 2. If "mem-hostnode" is not set, the node mask of this "mpol" will be set + to "all". +EQMP -- 1.8.3.1.448.gfb7dfaa