|SUCCESS|dpdk|0c0f70f98d| Intel-Testing
sys_stv at intel.com
sys_stv at intel.com
Wed Jun 3 18:53:26 CEST 2026
Test-Label: intel-Testing
Test-Status: SUCCESS
_Testing PASS_
DPDK git repo: dpdk
commit 0c0f70f98dcf5b860b2e422ad20f40cc9f1d3705
Author: Stephen Hemminger <stephen at networkplumber.org>
Date: Mon Jun 1 09:00:18 2026 -0700
mem: fix data race in Linux hugepage prefault
The prefault step in alloc_seg() reads a value from the hugepage and
writes it back unchanged to force the kernel to commit the backing
page. The read and write were not atomic, which races with concurrent
access to the same physical page from a secondary process attaching
to the hugetlbfs-backed mapping during rte_eal_init().
Replace the non-atomic load+store with a single atomic fetch-or of
zero. This touches the page with an atomic read-modify-write without
changing its contents, eliminating the race while preserving the
original intent of forcing a write fault.
Fixes: 0f1631be24bd ("mem: fix page fault trigger")
Cc: stable at dpdk.org
Reported-by: Michal Sieron <michal.sieron at nokia.com>
Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
Testing Summary : 18 Case Done, 18 Successful, 0 Failures
TestPlan:
pf_smoke: http://git.dpdk.org/tools/dts/tree/test_plans/pf_smoke_test_plan.rst
vf_smoke: http://git.dpdk.org/tools/dts/tree/test_plans/vf_smoke_test_plan.rst
virtio_smoke: http://git.dpdk.org/tools/dts/tree/test_plans/virtio_smoke_test_plan.rst
TestSuite:
pf_smoke: http://git.dpdk.org/tools/dts/tree/tests/TestSuite_pf_smoke.py
vf_smoke: http://git.dpdk.org/tools/dts/tree/tests/TestSuite_vf_smoke.py
virtio_smoke: http://git.dpdk.org/tools/dts/tree/tests/TestSuite_virtio_smoke.py
OS : Ubuntu 24.04.4 LTS
Kernel : 6.8.0-71-generic
GCC : 13.3.0-6ubuntu2~24.04.1
NIC : Ethernet Controller XL710 for 40GbE QSFP+
Target : x86_64-native-linuxapp-gcc
Test result details:
+-------------+---------------------------+-------+
| suite | case | status|
+-------------+---------------------------+-------+
| asan_smoke | test_rxtx_with_ASan_enable| passed|
| pf_smoke | test_pf_jumbo_frames | passed|
| pf_smoke | test_pf_rss | passed|
| pf_smoke | test_pf_tx_rx_queue | passed|
| vf_smoke | test_vf_rss | passed|
| vf_smoke | test_vf_tx_rx_queue | passed|
| vf_smoke | test_vf_jumbo_frames | n/a |
| virtio_smoke| test_virtio_loopback | passed|
| virtio_smoke| test_virtio_pvp | passed|
+-------------+---------------------------+-------+
OS : Ubuntu 24.04.4 LTS
Kernel : 6.8.0-87-generic
GCC : 13.3.0-6ubuntu2~24.04.1
NIC : Ethernet Controller E810-C for SFP
Target : x86_64-native-linuxapp-gcc
Test result details:
+-------------+---------------------------+-------+
| suite | case | status|
+-------------+---------------------------+-------+
| asan_smoke | test_rxtx_with_ASan_enable| passed|
| pf_smoke | test_pf_jumbo_frames | passed|
| pf_smoke | test_pf_rss | passed|
| pf_smoke | test_pf_tx_rx_queue | passed|
| vf_smoke | test_vf_jumbo_frames | passed|
| vf_smoke | test_vf_rss | passed|
| vf_smoke | test_vf_tx_rx_queue | passed|
| virtio_smoke| test_virtio_loopback | passed|
| virtio_smoke| test_virtio_pvp | passed|
+-------------+---------------------------+-------+
DPDK STV team
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