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X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: u7FkpV+iTLUB/uRTjixa9f7Rhgh1g7cWRB5pdVil2HJRbSOtGVIrWuxEr0q/YEnLtl9Ks99Zb7xmxLVXdJ687g== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ5PPFC15A51B16 X-OriginatorOrg: intel.com Hello, since we cannot understand well the purpose of this patch set, this report is just FYI what we observed in our tests. by this commit, a big config diff is introduced comparing to parent [1] then a boot test which can pass on parent now fails with a high rate. ========================================================================================= tbox_group/testcase/rootfs/kconfig/compiler/sleep: vm-snb/boot/quantal-x86_64-core-20190426.cgz/x86_64-rhel-9.4-rust/clang-20/1 commit: 822dafa31719f2 ("Revert "drm/i915: Depend on !PREEMPT_RT."") 7bb9eedbc87d82 ("PREEMPT_RT injection") 822dafa31719f205 7bb9eedbc87d8256eebc7edfd24 ---------------- --------------------------- fail:runs %reproduction fail:runs | | | :100 87% 87:100 dmesg.BUG:kernel_reboot-without-warning_in_test_stage unfortunately, we cannot find more useful information in dmesg. below is full report FYI. kernel test robot noticed "BUG:kernel_reboot-without-warning_in_test_stage" on: commit: 7bb9eedbc87d8256eebc7edfd240cb0cdf42e667 ("[i915-ci-only NO-REVIEW 24/25] PREEMPT_RT injection") url: https://github.com/intel-lab-lkp/linux/commits/Maarten-Lankhorst/drm-vblank_work-Add-methods-to-schedule-vblank_work-in-2-stages/20260226-012447 base: https://gitlab.freedesktop.org/drm/i915/kernel.git for-linux-next patch link: https://lore.kernel.org/all/20260225131931.60724-25-dev@lankhorst.se/ patch subject: [i915-ci-only NO-REVIEW 24/25] PREEMPT_RT injection in testcase: boot config: x86_64-rhel-9.4-rust compiler: clang-20 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 32G (please refer to attached dmesg/kmsg for entire log/backtrace) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202602280933.d4221030-lkp@intel.com LKP: ttyS0: 101: /lkp/lkp/src/bin/run-lkp /lkp/jobs/scheduled/vm-meta-207/boot-1-quantal-x86_64-core-20190426.cgz-7bb9eedbc87d-20260227-2306906-1p6guj1-96.yaml[ 27.416092][ T127] INFO: lkp CACHE_DIR is /tmp/cache [ 27.416099][ T127] [ 27.490291][ T255] ata2: found unknown device (class 0) [ 27.493888][ T255] ata2.00: ATAPI: QEMU DVD-ROM, 2.5+, max UDMA/100 [ 27.495381][ T127] LKP: stdout: 101: /lkp/lkp/src/bin/run-lkp /lkp/jobs/scheduled/vm-meta-207/boot-1-quantal-x86_64-core-20190426.cgz-7bb9eedbc87d-20260227-2306906-1p6guj1-96.yaml [ 27.495388][ T127] [ 27.510194][ T37] scsi 1:0:0:0: CD-ROM QEMU QEMU DVD-ROM 2.5+ PQ: 0 ANSI: 5 [ 27.591664][ T127] RESULT_ROOT=/result/boot/1/vm-snb/quantal-x86_64-core-20190426.cgz/x86_64-rhel-9.4-rust/clang-20/7bb9eedbc87d8256eebc7edfd240cb0cdf42e667/0 [ 27.591672][ T127] [ 27.613781][ T127] job=/lkp/jobs/scheduled/vm-meta-207/boot-1-quantal-x86_64-core-20190426.cgz-7bb9eedbc87d-20260227-2306906-1p6guj1-96.yaml [ 27.613791][ T127] [ 27.660154][ T219] bochs-drm 0000:00:02.0: vgaarb: deactivate vga console [ 27.667222][ T219] Console: switching to colour dummy device 80x25 [ 27.669389][ T219] [drm] Found bochs VGA, ID 0xb0c5. [ 27.669392][ T219] [drm] Framebuffer size 16384 kB @ 0xfd000000, mmio @ 0xfebf0000. [ 27.682301][ T127] result_service: raw_upload, RESULT_MNT: /internal-lkp-server/result, RESULT_ROOT: /internal-lkp-server/result/boot/1/vm-snb/quantal-x86_64-core-20190426.cgz/x86_64-rhel-9.4-rust/clang-20/7bb9eedbc87d8256eebc7edfd240cb0cdf42e667/0, TMP_RESULT_ROOT: /tmp/lkp/result [ 27.682309][ T127] [ 27.685840][ T219] [drm] Initialized bochs-drm 1.0.0 for 0000:00:02.0 on minor 0 [ 27.747112][ T301] parport_pc 00:03: reported by Plug and Play ACPI [ 27.747359][ T301] parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE] [ 27.749822][ T219] fbcon: bochs-drmdrmfb (fb0) is primary device [ 27.766802][ T127] run-job /lkp/jobs/scheduled/vm-meta-207/boot-1-quantal-x86_64-core-20190426.cgz-7bb9eedbc87d-20260227-2306906-1p6guj1-96.yaml [ 27.766807][ T127] [ 27.853871][ T219] Console: switching to colour frame buffer device 160x50 [ 27.867424][ T127] /usr/bin/wget -q --timeout=3600 --tries=1 --local-encoding=UTF-8 http://internal-lkp-server:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/jobs/scheduled/vm-meta-207/boot-1-quantal-x86_64-core-20190426.cgz-7bb9eedbc87d-20260227-2306906-1p6guj1-96.yaml&job_state=running -O /dev/null [ 27.867435][ T127] [ 27.897905][ T219] bochs-drm 0000:00:02.0: [drm] fb0: bochs-drmdrmfb frame buffer device [ 27.989445][ T1] init: failsafe main process (349) killed by TERM signal [ 28.051819][ T380] ppdev: user-space parallel port driver [ 28.093899][ T376] sr 1:0:0:0: [sr0] scsi3-mmc drive: 4x/4x cd/rw xa/form2 tray [ 28.093909][ T376] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 28.107727][ T376] sr 1:0:0:0: Attached scsi CD-ROM sr0 [ 28.357355][ T1] init: networking main process (446) terminated with status 1 [ 28.769126][ T127] target ucode: [ 28.769138][ T127] [ 28.804304][ T127] check_nr_cpu [ 28.804312][ T127] [ 28.812567][ T127] CPU(s): 2 [ 28.812573][ T127] [ 28.814711][ T127] On-line CPU(s) list: 0,1 [ 28.814715][ T127] [ 28.816753][ T127] Thread(s) per core: 1 [ 28.816758][ T127] [ 28.818021][ T127] Core(s) per socket: 2 [ 28.818026][ T127] [ 28.819871][ T127] Socket(s): 1 [ 28.819876][ T127] [ 28.820808][ T127] NUMA node(s): 1 [ 28.820812][ T127] [ 28.821855][ T127] NUMA node0 CPU(s): 0,1 [ 28.821859][ T127] [ 29.964375][ T127] sleep started [ 29.964382][ T127] [ 31.014164][ T127] /usr/bin/wget -q --timeout=3600 --tries=1 --local-encoding=UTF-8 http://internal-lkp-server:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/jobs/scheduled/vm-meta-207/boot-1-quantal-x86_64-core-20190426.cgz-7bb9eedbc87d-20260227-2306906-1p6guj1-96.yaml&job_state=post_run -O /dev/null [ 31.014174][ T127] [ 32.999598][ T127] kill 490 vmstat -n 1 [ 32.999606][ T127] [ 33.010867][ T127] kill 487 cat /proc/kmsg [ 33.010876][ T127] [ 33.029622][ T127] kill 510 /bin/sh /lkp/lkp/src/programs/watchdog/monitor [ 33.029629][ T127] [ 33.034143][ T127] wait for background processes: 504 [ 33.034150][ T127] [ 33.034420][ T127] monitor [ 33.034422][ T127] [ 37.395968][ T127] /usr/bin/wget -q --timeout=3600 --tries=1 --local-encoding=UTF-8 http://internal-lkp-server:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/jobs/scheduled/vm-meta-207/boot-1-quantal-x86_64-core-20190426.cgz-7bb9eedbc87d-20260227-2306906-1p6guj1-96.yaml&loadavg=0.89%200.25%200.08%202/122%20635&start_time=1772215785&end_time=1772215786&version=/lkp/lkp/.src-20260227-121815:db3bc08cea0e:bc832e21160e-dirty& -O /dev/null [ 37.395986][ T127] [ 38.230850][ T127] /usr/bin/wget -q --timeout=3600 --tries=1 --local-encoding=UTF-8 http://internal-lkp-server:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/jobs/scheduled/vm-meta-207/boot-1-quantal-x86_64-core-20190426.cgz-7bb9eedbc87d-20260227-2306906-1p6guj1-96.yaml&job_state=finished -O /dev/null [ 38.230880][ T127] LKP: ttyS0: 101: LKP: tbox cant kexec and rebooting forcely [ 39.153116][ T127] LKP: stdout: 101: LKP: tbox cant kexec and rebooting forcely [ 39.153123][ T127] [ 39.231552][ T127] /usr/bin/wget -q --timeout=3600 --tries=1 --local-encoding=UTF-8 http://internal-lkp-server:80/~lkp/cgi-bin/lkp-wtmp?tbox_name=vm-snb&tbox_state=rebooting_cant_kexec&job_file=/lkp/jobs/scheduled/vm-meta-207/boot-1-quantal-x86_64-core-20190426.cgz-7bb9eedbc87d-20260227-2306906-1p6guj1-96.yaml -O /dev/null [ 39.231562][ T127] BUG: kernel reboot-without-warning in test stage The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260228/202602280933.d4221030-lkp@intel.com [1] --- /pkg/linux/x86_64-rhel-9.4-rust/clang-20/822dafa31719f20589ae143ae18bfaa881f7785d/.config 2026-02-27 17:10:20.025441468 +0800 +++ /pkg/linux/x86_64-rhel-9.4-rust/clang-20/7bb9eedbc87d8256eebc7edfd240cb0cdf42e667/.config 2026-02-27 16:36:20.788050773 +0800 @@ -139,6 +139,8 @@ CONFIG_PREEMPT_BUILD=y CONFIG_ARCH_HAS_PREEMPT_LAZY=y # CONFIG_PREEMPT is not set CONFIG_PREEMPT_LAZY=y +CONFIG_PREEMPT_RT=y +# CONFIG_PREEMPT_RT_NEEDS_BH_LOCK is not set CONFIG_PREEMPT_COUNT=y CONFIG_PREEMPTION=y CONFIG_PREEMPT_DYNAMIC=y @@ -177,8 +179,11 @@ CONFIG_TASKS_RUDE_RCU=y CONFIG_TASKS_TRACE_RCU=y CONFIG_RCU_STALL_COMMON=y CONFIG_RCU_NEED_SEGCBLIST=y +CONFIG_RCU_BOOST=y +CONFIG_RCU_BOOST_DELAY=500 CONFIG_RCU_NOCB_CPU=y # CONFIG_RCU_NOCB_CPU_DEFAULT_ALL is not set +CONFIG_RCU_NOCB_CPU_CB_BOOST=y # CONFIG_RCU_LAZY is not set # end of RCU Subsystem @@ -203,8 +208,6 @@ CONFIG_CC_IMPLICIT_FALLTHROUGH="-Wimplic CONFIG_GCC10_NO_ARRAY_BOUNDS=y CONFIG_GCC_NO_STRINGOP_OVERFLOW=y CONFIG_ARCH_SUPPORTS_INT128=y -CONFIG_NUMA_BALANCING=y -CONFIG_NUMA_BALANCING_DEFAULT_ENABLED=y CONFIG_SLAB_OBJ_EXT=y CONFIG_CGROUPS=y CONFIG_PAGE_COUNTER=y @@ -933,14 +936,12 @@ CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PU CONFIG_HAVE_ARCH_HUGE_VMAP=y CONFIG_HAVE_ARCH_HUGE_VMALLOC=y CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y -CONFIG_ARCH_WANT_PMD_MKWRITE=y CONFIG_HAVE_ARCH_SOFT_DIRTY=y CONFIG_HAVE_MOD_ARCH_SPECIFIC=y CONFIG_MODULES_USE_ELF_RELA=y CONFIG_ARCH_HAS_EXECMEM_ROX=y CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK=y -CONFIG_SOFTIRQ_ON_OWN_STACK=y CONFIG_ARCH_HAS_ELF_RANDOMIZE=y CONFIG_HAVE_ARCH_MMAP_RND_BITS=y CONFIG_HAVE_EXIT_THREAD=y @@ -1101,7 +1102,6 @@ CONFIG_LOCK_SPIN_ON_OWNER=y CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y CONFIG_QUEUED_SPINLOCKS=y CONFIG_ARCH_USE_QUEUED_RWLOCKS=y -CONFIG_QUEUED_RWLOCKS=y CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE=y CONFIG_ARCH_HAS_SYNC_CORE_BEFORE_USERMODE=y CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y @@ -1191,12 +1191,11 @@ CONFIG_SPLIT_PMD_PTLOCKS=y CONFIG_BALLOON=y CONFIG_BALLOON_MIGRATION=y CONFIG_COMPACTION=y -CONFIG_COMPACT_UNEVICTABLE_DEFAULT=1 +CONFIG_COMPACT_UNEVICTABLE_DEFAULT=0 CONFIG_PAGE_REPORTING=y CONFIG_MIGRATION=y CONFIG_DEVICE_MIGRATION=y CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y -CONFIG_ARCH_ENABLE_THP_MIGRATION=y CONFIG_CONTIG_ALLOC=y CONFIG_PCP_BATCH_SCALE_MAX=5 CONFIG_PHYS_ADDR_T_64BIT=y @@ -1208,30 +1207,10 @@ CONFIG_MEMORY_FAILURE=y CONFIG_HWPOISON_INJECT=m CONFIG_ARCH_WANT_GENERAL_HUGETLB=y CONFIG_ARCH_WANTS_THP_SWAP=y -# CONFIG_PERSISTENT_HUGE_ZERO_FOLIO is not set -CONFIG_MM_ID=y -CONFIG_TRANSPARENT_HUGEPAGE=y -CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y -# CONFIG_TRANSPARENT_HUGEPAGE_MADVISE is not set -# CONFIG_TRANSPARENT_HUGEPAGE_NEVER is not set -CONFIG_TRANSPARENT_HUGEPAGE_SHMEM_HUGE_NEVER=y -# CONFIG_TRANSPARENT_HUGEPAGE_SHMEM_HUGE_ALWAYS is not set -# CONFIG_TRANSPARENT_HUGEPAGE_SHMEM_HUGE_WITHIN_SIZE is not set -# CONFIG_TRANSPARENT_HUGEPAGE_SHMEM_HUGE_ADVISE is not set -CONFIG_TRANSPARENT_HUGEPAGE_TMPFS_HUGE_NEVER=y -# CONFIG_TRANSPARENT_HUGEPAGE_TMPFS_HUGE_ALWAYS is not set -# CONFIG_TRANSPARENT_HUGEPAGE_TMPFS_HUGE_WITHIN_SIZE is not set -# CONFIG_TRANSPARENT_HUGEPAGE_TMPFS_HUGE_ADVISE is not set -CONFIG_THP_SWAP=y -# CONFIG_READ_ONLY_THP_FOR_FS is not set -# CONFIG_NO_PAGE_MAPCOUNT is not set CONFIG_PAGE_MAPCOUNT=y CONFIG_PGTABLE_HAS_HUGE_LEAVES=y CONFIG_HAVE_GIGANTIC_FOLIOS=y CONFIG_ASYNC_KERNEL_PGTABLE_FREE=y -CONFIG_ARCH_SUPPORTS_HUGE_PFNMAP=y -CONFIG_ARCH_SUPPORTS_PMD_PFNMAP=y -CONFIG_ARCH_SUPPORTS_PUD_PFNMAP=y CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y CONFIG_USE_PERCPU_NUMA_NODE_ID=y @@ -1537,7 +1516,6 @@ CONFIG_NF_FLOW_TABLE_INET=m CONFIG_NF_FLOW_TABLE=m CONFIG_NF_FLOW_TABLE_PROCFS=y CONFIG_NETFILTER_XTABLES=y -# CONFIG_NETFILTER_XTABLES_LEGACY is not set # # Xtables combined modules @@ -2859,7 +2837,6 @@ CONFIG_DM_INTEGRITY=m # CONFIG_DM_ZONED is not set CONFIG_DM_AUDIT=y # CONFIG_DM_VDO is not set -# CONFIG_DM_PCACHE is not set CONFIG_TARGET_CORE=m CONFIG_TCM_IBLOCK=m CONFIG_TCM_FILEIO=m @@ -5344,6 +5321,7 @@ CONFIG_DRM_I915_MAX_REQUEST_BUSYWAIT=800 CONFIG_DRM_I915_STOP_TIMEOUT=100 CONFIG_DRM_I915_TIMESLICE_DURATION=1 CONFIG_DRM_MGAG200=m +# CONFIG_DRM_MGAG200_DISABLE_WRITECOMBINE is not set CONFIG_DRM_NOUVEAU=m CONFIG_NOUVEAU_DEBUG=5 CONFIG_NOUVEAU_DEBUG_DEFAULT=3 @@ -6939,7 +6917,6 @@ CONFIG_LEDS_TRIGGER_DISK=y # CONFIG_LEDS_TRIGGER_MTD is not set CONFIG_LEDS_TRIGGER_HEARTBEAT=m CONFIG_LEDS_TRIGGER_BACKLIGHT=m -# CONFIG_LEDS_TRIGGER_CPU is not set # CONFIG_LEDS_TRIGGER_ACTIVITY is not set CONFIG_LEDS_TRIGGER_GPIO=m CONFIG_LEDS_TRIGGER_DEFAULT_ON=m @@ -8387,12 +8364,8 @@ CONFIG_RAMDAX=m CONFIG_NVDIMM_KEYS=y # CONFIG_NVDIMM_SECURITY_TEST is not set CONFIG_DAX=y -CONFIG_DEV_DAX=m -CONFIG_DEV_DAX_PMEM=m CONFIG_DEV_DAX_HMEM=m -CONFIG_DEV_DAX_CXL=m CONFIG_DEV_DAX_HMEM_DEVICES=y -CONFIG_DEV_DAX_KMEM=m CONFIG_NVMEM=y CONFIG_NVMEM_SYSFS=y # CONFIG_NVMEM_LAYOUTS is not set @@ -8476,7 +8449,6 @@ CONFIG_GFS2_FS_LOCKING_DLM=y # CONFIG_F2FS_FS is not set # CONFIG_ZONEFS_FS is not set CONFIG_FS_DAX=y -CONFIG_FS_DAX_PMD=y CONFIG_FS_POSIX_ACL=y CONFIG_EXPORTFS=y CONFIG_EXPORTFS_BLOCK_OPS=y @@ -9490,7 +9462,6 @@ CONFIG_HAVE_ARCH_KFENCE=y # CONFIG_KFENCE is not set CONFIG_HAVE_ARCH_KMSAN=y CONFIG_HAVE_KMSAN_COMPILER=y -# CONFIG_KMSAN is not set # end of Memory Debugging CONFIG_DEBUG_SHIRQ=y @@ -9516,7 +9487,6 @@ CONFIG_BOOTPARAM_HARDLOCKUP_PANIC=y CONFIG_DETECT_HUNG_TASK=y CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=480 CONFIG_BOOTPARAM_HUNG_TASK_PANIC=0 -CONFIG_DETECT_HUNG_TASK_BLOCKER=y CONFIG_WQ_WATCHDOG=y CONFIG_BOOTPARAM_WQ_STALL_PANIC=0 # CONFIG_WQ_CPU_INTENSIVE_REPORT is not set @@ -9541,9 +9511,7 @@ CONFIG_LOCK_DEBUGGING_SUPPORT=y # CONFIG_LOCK_STAT is not set # CONFIG_DEBUG_RT_MUTEXES is not set # CONFIG_DEBUG_SPINLOCK is not set -# CONFIG_DEBUG_MUTEXES is not set # CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set -# CONFIG_DEBUG_RWSEMS is not set # CONFIG_DEBUG_LOCK_ALLOC is not set CONFIG_DEBUG_ATOMIC_SLEEP=y # CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set @@ -9882,7 +9850,6 @@ CONFIG_SIPHASH_KUNIT_TEST=m # CONFIG_TEST_MEMCAT_P is not set # CONFIG_TEST_OBJAGG is not set # CONFIG_TEST_MEMINIT is not set -CONFIG_TEST_HMM=m # CONFIG_TEST_FREE_PAGES is not set # CONFIG_TEST_FPU is not set # CONFIG_TEST_CLOCKSOURCE_WATCHDOG is not set -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki