From: Jakub Kicinski Date: Thu, 27 Nov 2025 19:45:56 +0000 (-0800) Subject: selftests: net: add a hint about MACAddressPolicy=persistent X-Git-Tag: v6.19-rc1~170^2~22 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=aadff9f766399a350aa3e09fc671617bdc0b365f;p=thirdparty%2Fkernel%2Flinux.git selftests: net: add a hint about MACAddressPolicy=persistent New NIPA installation had been reporting a few flaky tests. arp_ndisc_evict_nocarrier is most flaky of them all. I suspect that the flakiness is due to udev swapping the MAC addresses on the interfaces. Extend the message in arp_ndisc_evict_nocarrier to hint at this potential issue. Having the neigh get fail right after ping is rather unusual, unless udev changes the MAC addr causing a flush in the meantime. Link: https://patch.msgid.link/20251127194556.2409574-1-kuba@kernel.org Signed-off-by: Jakub Kicinski --- diff --git a/tools/testing/selftests/net/arp_ndisc_evict_nocarrier.sh b/tools/testing/selftests/net/arp_ndisc_evict_nocarrier.sh index 92eb880c52f28..00758f00efbfa 100755 --- a/tools/testing/selftests/net/arp_ndisc_evict_nocarrier.sh +++ b/tools/testing/selftests/net/arp_ndisc_evict_nocarrier.sh @@ -75,7 +75,7 @@ setup_v4() { ip neigh get $V4_ADDR1 dev veth0 >/dev/null 2>&1 if [ $? -ne 0 ]; then cleanup_v4 - echo "failed" + echo "failed; is the system using MACAddressPolicy=persistent ?" exit 1 fi