kernel/tools/testing/selftests/drivers/net/hw, branch linux-rolling-stable

selftests: drv-net: fix RPS mask handling for high CPU numbers

2026-01-14T03:13:08Z

The RPS bitmask bounds check uses ~(RPS_MAX_CPUS - 1) which equals ~15 = 0xfff0, only allowing CPUs 0-3. Change the mask to ~((1UL << RPS_MAX_CPUS) - 1) = ~0xffff to allow CPUs 0-15. Fixes: 5ebfb4cc3048 ("selftests/net: toeplitz test") Reviewed-by: Nimrod Oren Signed-off-by: Gal Pressman Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20260112173715.384843-3-gal@nvidia.com Signed-off-by: Jakub Kicinski

selftests: drv-net: fix RPS mask handling in toeplitz test

2026-01-14T03:13:08Z

The toeplitz.py test passed the hex mask without "0x" prefix (e.g., "300" for CPUs 8,9). The toeplitz.c strtoul() call wrongly parsed this as decimal 300 (0x12c) instead of hex 0x300. Pass the prefixed mask to toeplitz.c, and the unprefixed one to sysfs. Fixes: 9cf9aa77a1f6 ("selftests: drv-net: hw: convert the Toeplitz test to Python") Reviewed-by: Nimrod Oren Signed-off-by: Gal Pressman Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20260112173715.384843-2-gal@nvidia.com Signed-off-by: Jakub Kicinski

selftests: drv-net: Bring back tool() to driver inits

2026-01-07T01:52:08Z

The pp_alloc_fail.py test (which doesn't run in NIPA CI?) uses tool, add back the import. Resolves: ImportError: cannot import name 'tool' from 'lib.py' Fixes: 68a052239fc4 ("selftests: drv-net: update remaining Python init files") Reviewed-by: Nimrod Oren Signed-off-by: Gal Pressman Link: https://patch.msgid.link/20260105163319.47619-1-gal@nvidia.com Signed-off-by: Jakub Kicinski

Merge tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-12-06T22:01:20Z

Pull non-MM updates from Andrew Morton: - "panic: sys_info: Refactor and fix a potential issue" (Andy Shevchenko) fixes a build issue and does some cleanup in ib/sys_info.c - "Implement mul_u64_u64_div_u64_roundup()" (David Laight) enhances the 64-bit math code on behalf of a PWM driver and beefs up the test module for these library functions - "scripts/gdb/symbols: make BPF debug info available to GDB" (Ilya Leoshkevich) makes BPF symbol names, sizes, and line numbers available to the GDB debugger - "Enable hung_task and lockup cases to dump system info on demand" (Feng Tang) adds a sysctl which can be used to cause additional info dumping when the hung-task and lockup detectors fire - "lib/base64: add generic encoder/decoder, migrate users" (Kuan-Wei Chiu) adds a general base64 encoder/decoder to lib/ and migrates several users away from their private implementations - "rbree: inline rb_first() and rb_last()" (Eric Dumazet) makes TCP a little faster - "liveupdate: Rework KHO for in-kernel users" (Pasha Tatashin) reworks the KEXEC Handover interfaces in preparation for Live Update Orchestrator (LUO), and possibly for other future clients - "kho: simplify state machine and enable dynamic updates" (Pasha Tatashin) increases the flexibility of KEXEC Handover. Also preparation for LUO - "Live Update Orchestrator" (Pasha Tatashin) is a major new feature targeted at cloud environments. Quoting the cover letter: This series introduces the Live Update Orchestrator, a kernel subsystem designed to facilitate live kernel updates using a kexec-based reboot. This capability is critical for cloud environments, allowing hypervisors to be updated with minimal downtime for running virtual machines. LUO achieves this by preserving the state of selected resources, such as memory, devices and their dependencies, across the kernel transition. As a key feature, this series includes support for preserving memfd file descriptors, which allows critical in-memory data, such as guest RAM or any other large memory region, to be maintained in RAM across the kexec reboot. Mike Rappaport merits a mention here, for his extensive review and testing work. - "kexec: reorganize kexec and kdump sysfs" (Sourabh Jain) moves the kexec and kdump sysfs entries from /sys/kernel/ to /sys/kernel/kexec/ and adds back-compatibility symlinks which can hopefully be removed one day - "kho: fixes for vmalloc restoration" (Mike Rapoport) fixes a BUG which was being hit during KHO restoration of vmalloc() regions * tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (139 commits) calibrate: update header inclusion Reinstate "resource: avoid unnecessary lookups in find_next_iomem_res()" vmcoreinfo: track and log recoverable hardware errors kho: fix restoring of contiguous ranges of order-0 pages kho: kho_restore_vmalloc: fix initialization of pages array MAINTAINERS: TPM DEVICE DRIVER: update the W-tag init: replace simple_strtoul with kstrtoul to improve lpj_setup KHO: fix boot failure due to kmemleak access to non-PRESENT pages Documentation/ABI: new kexec and kdump sysfs interface Documentation/ABI: mark old kexec sysfs deprecated kexec: move sysfs entries to /sys/kernel/kexec test_kho: always print restore status kho: free chunks using free_page() instead of kfree() selftests/liveupdate: add kexec test for multiple and empty sessions selftests/liveupdate: add simple kexec-based selftest for LUO selftests/liveupdate: add userspace API selftests docs: add documentation for memfd preservation via LUO mm: memfd_luo: allow preserving memfd liveupdate: luo_file: add private argument to store runtime state mm: shmem: export some functions to internal.h ...

selftests: drv-net: Fix tolerance calculation in devlink_rate_tc_bw.py

2025-12-02T01:18:41Z

Currently, tolerance is computed against the TC’s expected percentage, making TC3 (20%) validation overly strict and TC4 (80%) overly loose. Update BandwidthValidator to take a dict of shares and compute bounds relative to the overall total, so that all shares are validated consistently. Signed-off-by: Carolina Jubran Reviewed-by: Cosmin Ratiu Reviewed-by: Nimrod Oren Link: https://patch.msgid.link/20251130091938.4109055-7-cjubran@nvidia.com Signed-off-by: Jakub Kicinski

selftests: drv-net: Fix and clarify TC bandwidth split in devlink_rate_tc_bw.py

2025-12-02T01:18:41Z

Correct the documented bandwidth distribution between TC3 and TC4 from 80/20 to 20/80. Update test descriptions and printed messages to consistently reflect the intended split. Signed-off-by: Carolina Jubran Reviewed-by: Cosmin Ratiu Reviewed-by: Nimrod Oren Link: https://patch.msgid.link/20251130091938.4109055-6-cjubran@nvidia.com Signed-off-by: Jakub Kicinski

selftests: drv-net: Set shell=True for sysfs writes in devlink_rate_tc_bw.py

2025-12-02T01:18:41Z

Commit 7c32f7a2d3db ("selftests: net: py: don't default to shell=True") changed the cmd() helper to avoid spawning a shell unless explicitly requested. The devlink_rate_tc_bw test enables SR-IOV by writing to the sriov_numvfs sysfs attribute using redirection. Without shell=True the redirection is not interpreted and the VF device never appears, causing the test to fail. Fix by explicitly passing shell=True in the two places that update sriov_numvfs. Signed-off-by: Carolina Jubran Reviewed-by: Cosmin Ratiu Reviewed-by: Nimrod Oren Link: https://patch.msgid.link/20251130091938.4109055-5-cjubran@nvidia.com Signed-off-by: Jakub Kicinski

selftests: drv-net: Use Iperf3Runner in devlink_rate_tc_bw.py

2025-12-02T01:18:41Z

Replace the inline iperf3 subprocess and JSON parsing with Iperf3Runner. Signed-off-by: Carolina Jubran Reviewed-by: Cosmin Ratiu Reviewed-by: Nimrod Oren Link: https://patch.msgid.link/20251130091938.4109055-4-cjubran@nvidia.com Signed-off-by: Jakub Kicinski

selftests: drv-net: introduce Iperf3Runner for measurement use cases

2025-12-02T01:18:41Z

GenerateTraffic was added to spin up long-running iperf3 load, mainly to drive high PPS background traffic. It was never meant to provide stable throughput numbers, and trying to repurpose it for measurement does not make sense. Introduce Iperf3Runner to allow tests to split out server/client configuration, control start/stop, and collect JSON output for analysis. This makes it possible to measure bandwidth directly when validating egress shaping. GenerateTraffic stays as the background load generator, reusing the common iperf3 helpers under the hood. Signed-off-by: Carolina Jubran Reviewed-by: Cosmin Ratiu Reviewed-by: Nimrod Oren Link: https://patch.msgid.link/20251130091938.4109055-3-cjubran@nvidia.com Signed-off-by: Jakub Kicinski

selftests: drv-net: Add devlink_rate_tc_bw.py to TEST_PROGS

2025-12-02T01:18:40Z

This makes devlink_rate_tc_bw.py present in the Makefile under the same directory. Signed-off-by: Carolina Jubran Reviewed-by: Cosmin Ratiu Reviewed-by: Nimrod Oren Link: https://patch.msgid.link/20251130091938.4109055-2-cjubran@nvidia.com Signed-off-by: Jakub Kicinski

kernel/tools/testing/selftests/drivers/net/hw, branch linux-rolling-stable

selftests: drv-net: fix RPS mask handling for high CPU numbers

selftests: drv-net: fix RPS mask handling in toeplitz test

selftests: drv-net: Bring back tool() to driver __init__s

Merge tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

selftests: drv-net: Fix tolerance calculation in devlink_rate_tc_bw.py

selftests: drv-net: Fix and clarify TC bandwidth split in devlink_rate_tc_bw.py

selftests: drv-net: Set shell=True for sysfs writes in devlink_rate_tc_bw.py

selftests: drv-net: Use Iperf3Runner in devlink_rate_tc_bw.py

selftests: drv-net: introduce Iperf3Runner for measurement use cases

selftests: drv-net: Add devlink_rate_tc_bw.py to TEST_PROGS

selftests: drv-net: Bring back tool() to driver inits