Hi all, I'm experiencing boot failures with net-next git-tree after it got rebased/merged with Linus'es tree at v4.17.0-rc1.
The boot problem only occurs for certain kernel configs. I've bisected the config problem down to enabling CONFIG_PREEMPT=y and resulting dependencies in below diff. Is this a know problem? Have others experienced this too? This happens for me on two different (x86_64) testlab machines... I also tested on Linus'es tree at v4.17-rc2, and problem also exists for me there. -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer --- config21-steps-works 2018-04-24 21:33:42.353751894 +0200 +++ config20-steps-bad 2018-04-24 21:27:19.852654328 +0200 @@ -131,7 +131,7 @@ # # RCU Subsystem # -CONFIG_TREE_RCU=y +CONFIG_PREEMPT_RCU=y # CONFIG_RCU_EXPERT is not set CONFIG_SRCU=y CONFIG_TREE_SRCU=y @@ -421,11 +421,7 @@ CONFIG_BFQ_GROUP_IOSCHED=y CONFIG_PREEMPT_NOTIFIERS=y CONFIG_ASN1=y -CONFIG_INLINE_SPIN_UNLOCK_IRQ=y -CONFIG_INLINE_READ_UNLOCK=y -CONFIG_INLINE_READ_UNLOCK_IRQ=y -CONFIG_INLINE_WRITE_UNLOCK=y -CONFIG_INLINE_WRITE_UNLOCK_IRQ=y +CONFIG_UNINLINE_SPIN_UNLOCK=y CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y CONFIG_MUTEX_SPIN_ON_OWNER=y CONFIG_RWSEM_SPIN_ON_OWNER=y @@ -497,9 +493,10 @@ CONFIG_SCHED_SMT=y CONFIG_SCHED_MC=y CONFIG_SCHED_MC_PRIO=y -CONFIG_PREEMPT_NONE=y +# CONFIG_PREEMPT_NONE is not set # CONFIG_PREEMPT_VOLUNTARY is not set -# CONFIG_PREEMPT is not set +CONFIG_PREEMPT=y +CONFIG_PREEMPT_COUNT=y CONFIG_X86_LOCAL_APIC=y CONFIG_X86_IO_APIC=y CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS=y @@ -3931,6 +3928,7 @@ # CONFIG_SCHEDSTATS is not set # CONFIG_SCHED_STACK_END_CHECK is not set # CONFIG_DEBUG_TIMEKEEPING is not set +# CONFIG_DEBUG_PREEMPT is not set # # Lock Debugging (spinlocks, mutexes, etc...) @@ -3996,6 +3994,7 @@ CONFIG_FUNCTION_GRAPH_TRACER=y # CONFIG_PREEMPTIRQ_EVENTS is not set # CONFIG_IRQSOFF_TRACER is not set +# CONFIG_PREEMPT_TRACER is not set # CONFIG_SCHED_TRACER is not set CONFIG_HWLAT_TRACER=y # CONFIG_FTRACE_SYSCALLS is not set
