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kvm tools: Default guest cpu count to host cpu count

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If user haven't specified cpu count for the guest, use
the amount of online cpus on the host.

Tested-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Sasha Levin
2011-05-18 22:56:24 +03:00
committed by Will Deacon
parent 49e5227d9f
commit cfd63bbb47
1 changed files with 6 additions and 3 deletions
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kvm-run.c
+6 -3
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@@ -70,7 +70,7 @@ extern int active_console;
bool do_debug_print = false;
static int nrcpus = 1;
static int nrcpus;
static const char * const run_usage[] = {
"kvm run [<options>] [<kernel image>]",
@@ -410,6 +410,8 @@ int kvm_cmd_run(int argc, const char **argv, const char *prefix)
signal(SIGQUIT, handle_sigquit);
signal(SIGUSR1, handle_sigusr1);
nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
while (argc != 0) {
argc = parse_options(argc, argv, options, run_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
@@ -440,7 +442,9 @@ int kvm_cmd_run(int argc, const char **argv, const char *prefix)
vmlinux_filename = find_vmlinux();
if (nrcpus < 1 || nrcpus > KVM_NR_CPUS)
if (nrcpus == 0)
nrcpus = nr_online_cpus;
else if (nrcpus < 1 || nrcpus > KVM_NR_CPUS)
die("Number of CPUs %d is out of [1;%d] range", nrcpus, KVM_NR_CPUS);
if (!ram_size)
@@ -576,7 +580,6 @@ int kvm_cmd_run(int argc, const char **argv, const char *prefix)
kvm__init_ram(kvm);
nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
thread_pool__init(nr_online_cpus);
for (i = 0; i < nrcpus; i++) {