[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH v2 3/3] vl: Don't silently change topology when all
From: |
Eduardo Habkost |
Subject: |
[Qemu-devel] [PATCH v2 3/3] vl: Don't silently change topology when all -smp options were set |
Date: |
Tue, 11 Nov 2014 16:50:56 -0200 |
QEMU tries to change the "threads" option even if it was explicitly set
in the command-line, and it shouldn't do that.
The right thing to do when all options (cpus, sockets, cores, threds)
are explicitly set is to sanity check them and abort in case they don't
make sense (i.e. when sockets*cores*threads < cpus).
Signed-off-by: Eduardo Habkost <address@hidden>
---
vl.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/vl.c b/vl.c
index 2ed8b07..8880a4e 100644
--- a/vl.c
+++ b/vl.c
@@ -1287,8 +1287,14 @@ static void smp_parse(QemuOpts *opts)
} else if (cores == 0) {
threads = threads > 0 ? threads : 1;
cores = cpus / (sockets * threads);
- } else {
+ } else if (threads == 0) {
threads = cpus / (cores * sockets);
+ } else if (sockets * cores * threads < cpus) {
+ fprintf(stderr, "cpu topology: error: "
+ "sockets (%u) * cores (%u) * threads (%u) < "
+ "smp_cpus (%u)\n",
+ sockets, cores, threads, cpus);
+ exit(1);
}
max_cpus = qemu_opt_get_number(opts, "maxcpus", 0);
--
1.9.3