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authorJesper Dangaard Brouer <brouer@redhat.com>2018-08-08 23:00:39 +0200
committerDaniel Borkmann <daniel@iogearbox.net>2018-08-09 21:50:44 +0200
commit37d7ff25957e05860e068a986209fee128db574a (patch)
tree33c5db1b89a72b50902792c02810278c32393744 /samples
parentad0ab027fc6da08cbd34070d816ff3b7986c64ae (diff)
downloadlinux-stericsson-37d7ff25957e05860e068a986209fee128db574a.tar.gz
samples/bpf: xdp_redirect_cpu adjustment to reproduce teardown race easier
The teardown race in cpumap is really hard to reproduce. These changes makes it easier to reproduce, for QA. The --stress-mode now have a case of a very small queue size of 8, that helps to trigger teardown flush to encounter a full queue, which results in calling xdp_return_frame API, in a non-NAPI protect context. Also increase MAX_CPUS, as my QA department have larger machines than me. Tested-by: Jean-Tsung Hsiao <jhsiao@redhat.com> Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'samples')
-rw-r--r--samples/bpf/xdp_redirect_cpu_kern.c2
-rw-r--r--samples/bpf/xdp_redirect_cpu_user.c4
2 files changed, 3 insertions, 3 deletions
diff --git a/samples/bpf/xdp_redirect_cpu_kern.c b/samples/bpf/xdp_redirect_cpu_kern.c
index 303e9e7161f3..4938dcbaecbf 100644
--- a/samples/bpf/xdp_redirect_cpu_kern.c
+++ b/samples/bpf/xdp_redirect_cpu_kern.c
@@ -14,7 +14,7 @@
#include <uapi/linux/bpf.h>
#include "bpf_helpers.h"
-#define MAX_CPUS 12 /* WARNING - sync with _user.c */
+#define MAX_CPUS 64 /* WARNING - sync with _user.c */
/* Special map type that can XDP_REDIRECT frames to another CPU */
struct bpf_map_def SEC("maps") cpu_map = {
diff --git a/samples/bpf/xdp_redirect_cpu_user.c b/samples/bpf/xdp_redirect_cpu_user.c
index f6efaefd485b..4b4d78fffe30 100644
--- a/samples/bpf/xdp_redirect_cpu_user.c
+++ b/samples/bpf/xdp_redirect_cpu_user.c
@@ -19,7 +19,7 @@ static const char *__doc__ =
#include <arpa/inet.h>
#include <linux/if_link.h>
-#define MAX_CPUS 12 /* WARNING - sync with _kern.c */
+#define MAX_CPUS 64 /* WARNING - sync with _kern.c */
/* How many xdp_progs are defined in _kern.c */
#define MAX_PROG 5
@@ -527,7 +527,7 @@ static void stress_cpumap(void)
* procedure.
*/
create_cpu_entry(1, 1024, 0, false);
- create_cpu_entry(1, 128, 0, false);
+ create_cpu_entry(1, 8, 0, false);
create_cpu_entry(1, 16000, 0, false);
}