* [bisected] system hang after boot
@ 2017-11-22 17:46 Sebastian Ott
2017-11-22 18:26 ` Will Deacon
0 siblings, 1 reply; 14+ messages in thread
From: Sebastian Ott @ 2017-11-22 17:46 UTC (permalink / raw)
To: Will Deacon, Peter Zijlstra, Ingo Molnar
Cc: Martin Schwidefsky, Heiko Carstens, linux-kernel
[-- Attachment #1: Type: text/plain, Size: 1470 bytes --]
Hi,
One of my test systems (s390) hangs after boot. One of the cpus is idle
the other is in arch_spin_relax. Bisect pointed to this one:
a8a217c22116eff6c120d753c9934089fb229af0 is the first bad commit
commit a8a217c22116eff6c120d753c9934089fb229af0
Author: Will Deacon <will.deacon@arm.com>
Date: Tue Oct 3 19:25:27 2017 +0100
locking/core: Remove {read,spin,write}_can_lock()
Outside of the locking code itself, {read,spin,write}_can_lock() have no
users in tree. Apparmor (the last remaining user of write_can_lock()) got
moved over to lockdep by the previous patch.
This patch removes the use of {read,spin,write}_can_lock() from the
BUILD_LOCK_OPS macro, deferring to the trylock operation for testing the
lock status, and subsequently removes the unused macros altogether. They
aren't guaranteed to work in a concurrent environment and can give
incorrect results in the case of qrwlock.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1507055129-12300-2-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Bisect log and config attached. The same config but with lockdep enabled
works ok.
Sebastian
[-- Attachment #2: Type: text/plain, Size: 2849 bytes --]
# bad: [0c86a6bd85ff0629cd2c5141027fc1c8bb6cde9c] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
# good: [bebc6082da0a9f5d47a1ea2edc099bf671058bd4] Linux 4.14
git bisect start 'HEAD' 'v4.14'
# bad: [5bbcc0f595fadb4cac0eddc4401035ec0bd95b09] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
git bisect bad 5bbcc0f595fadb4cac0eddc4401035ec0bd95b09
# bad: [2cd83ba5bede2f72cc6c79a19a1bddf576b50e88] Merge tag 'iommu-v4.15-rc1' of git://github.com/awilliam/linux-vfio
git bisect bad 2cd83ba5bede2f72cc6c79a19a1bddf576b50e88
# bad: [449fcf3ab0baf3dde9952385e6789f2ca10c3980] Merge tag 'staging-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
git bisect bad 449fcf3ab0baf3dde9952385e6789f2ca10c3980
# bad: [43ff2f4db9d0f76452b77cfa645f02b471143b24] Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 43ff2f4db9d0f76452b77cfa645f02b471143b24
# good: [f08d8bcc12de5a153e587027e77de83662eefb8a] Merge tag 'please-pull-gettime_vsyscall_update' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux
git bisect good f08d8bcc12de5a153e587027e77de83662eefb8a
# bad: [31486372a1e9a66ec2e9e2903b8792bba7e503e1] Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 31486372a1e9a66ec2e9e2903b8792bba7e503e1
# good: [0d3d73aac2ff05c78387aa9dcc2c8aa3804405e7] perf/core: Rewrite event timekeeping
git bisect good 0d3d73aac2ff05c78387aa9dcc2c8aa3804405e7
# bad: [53bef3fd47f69e40b52c9f9acd3551dfff9f8702] timers/hrtimer: Use lockdep to assert IRQs are disabled/enabled
git bisect bad 53bef3fd47f69e40b52c9f9acd3551dfff9f8702
# bad: [332efa6374de75c622b782569b16bb50fd722cf5] locking/atomics, EDAC/altera: Convert ACCESS_ONCE() to READ_ONCE()/WRITE_ONCE()
git bisect bad 332efa6374de75c622b782569b16bb50fd722cf5
# bad: [0160fb177d484367e041ac251fca591a3e49660c] locking/arch: Remove dummy arch_{read,spin,write}_relax() implementations
git bisect bad 0160fb177d484367e041ac251fca591a3e49660c
# good: [8c74392a8db9f19f7b2d07f3bb7c5accb4cb4702] locking/arch, alpha: Add __down_read_killable()
git bisect good 8c74392a8db9f19f7b2d07f3bb7c5accb4cb4702
# good: [76f8507f7a6442215df19de74f07eabca2462f1e] locking/rwsem: Add down_read_killable()
git bisect good 76f8507f7a6442215df19de74f07eabca2462f1e
# good: [26c4eb192c6224e5297496cead36404b62fb071b] locking/rwsem, security/apparmor: Replace homebrew use of write_can_lock() with lockdep
git bisect good 26c4eb192c6224e5297496cead36404b62fb071b
# bad: [a8a217c22116eff6c120d753c9934089fb229af0] locking/core: Remove {read,spin,write}_can_lock()
git bisect bad a8a217c22116eff6c120d753c9934089fb229af0
# first bad commit: [a8a217c22116eff6c120d753c9934089fb229af0] locking/core: Remove {read,spin,write}_can_lock()
[-- Attachment #3: Type: text/plain, Size: 57564 bytes --]
#
# Automatically generated file; DO NOT EDIT.
# Linux/s390 4.14.0 Kernel Configuration
#
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
CONFIG_CPU_BIG_ENDIAN=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
CONFIG_ARCH_DMA_ADDR_T_64BIT=y
CONFIG_GENERIC_LOCKBREAK=y
CONFIG_PGSTE=y
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_KEXEC=y
CONFIG_AUDIT_ARCH=y
CONFIG_NO_IOPORT_MAP=y
# CONFIG_PCI_QUIRKS is not set
CONFIG_ARCH_SUPPORTS_UPROBES=y
CONFIG_S390=y
CONFIG_SCHED_OMIT_FRAME_POINTER=y
CONFIG_PGTABLE_LEVELS=5
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
CONFIG_IRQ_WORK=y
CONFIG_BUILDTIME_EXTABLE_SORT=y
CONFIG_THREAD_INFO_IN_TASK=y
#
# General setup
#
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_CROSS_COMPILE=""
# CONFIG_COMPILE_TEST is not set
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_BZIP2=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_HAVE_KERNEL_LZO=y
CONFIG_HAVE_KERNEL_LZ4=y
CONFIG_KERNEL_GZIP=y
# CONFIG_KERNEL_BZIP2 is not set
# CONFIG_KERNEL_LZMA is not set
# CONFIG_KERNEL_XZ is not set
# CONFIG_KERNEL_LZO is not set
# CONFIG_KERNEL_LZ4 is not set
CONFIG_DEFAULT_HOSTNAME="(none)"
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
CONFIG_CROSS_MEMORY_ATTACH=y
# CONFIG_USELIB is not set
CONFIG_AUDIT=y
CONFIG_HAVE_ARCH_AUDITSYSCALL=y
CONFIG_AUDITSYSCALL=y
CONFIG_AUDIT_WATCH=y
CONFIG_AUDIT_TREE=y
#
# IRQ subsystem
#
CONFIG_GENERIC_MSI_IRQ=y
CONFIG_SPARSE_IRQ=y
# CONFIG_GENERIC_IRQ_DEBUGFS is not set
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_GENERIC_CLOCKEVENTS=y
#
# Timers subsystem
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ_COMMON=y
# CONFIG_HZ_PERIODIC is not set
CONFIG_NO_HZ_IDLE=y
# CONFIG_NO_HZ is not set
CONFIG_HIGH_RES_TIMERS=y
#
# CPU/Task time and stats accounting
#
CONFIG_VIRT_CPU_ACCOUNTING=y
CONFIG_VIRT_CPU_ACCOUNTING_NATIVE=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
CONFIG_TASKSTATS=y
CONFIG_TASK_DELAY_ACCT=y
CONFIG_TASK_XACCT=y
CONFIG_TASK_IO_ACCOUNTING=y
# CONFIG_CPU_ISOLATION is not set
#
# RCU Subsystem
#
CONFIG_PREEMPT_RCU=y
# CONFIG_RCU_EXPERT is not set
CONFIG_SRCU=y
CONFIG_TREE_SRCU=y
CONFIG_TASKS_RCU=y
CONFIG_RCU_STALL_COMMON=y
CONFIG_RCU_NEED_SEGCBLIST=y
CONFIG_BUILD_BIN2C=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=17
CONFIG_LOG_CPU_MAX_BUF_SHIFT=12
CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=13
CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y
CONFIG_CGROUPS=y
CONFIG_PAGE_COUNTER=y
CONFIG_MEMCG=y
CONFIG_MEMCG_SWAP=y
CONFIG_MEMCG_SWAP_ENABLED=y
CONFIG_BLK_CGROUP=y
# CONFIG_DEBUG_BLK_CGROUP is not set
CONFIG_CGROUP_WRITEBACK=y
CONFIG_CGROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
CONFIG_CFS_BANDWIDTH=y
CONFIG_RT_GROUP_SCHED=y
CONFIG_CGROUP_PIDS=y
# CONFIG_CGROUP_RDMA is not set
CONFIG_CGROUP_FREEZER=y
CONFIG_CGROUP_HUGETLB=y
CONFIG_CPUSETS=y
CONFIG_PROC_PID_CPUSET=y
CONFIG_CGROUP_DEVICE=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_CGROUP_PERF=y
# CONFIG_CGROUP_BPF is not set
# CONFIG_CGROUP_DEBUG is not set
CONFIG_SOCK_CGROUP_DATA=y
CONFIG_NAMESPACES=y
CONFIG_UTS_NS=y
CONFIG_IPC_NS=y
CONFIG_USER_NS=y
CONFIG_PID_NS=y
CONFIG_NET_NS=y
CONFIG_SCHED_AUTOGROUP=y
# CONFIG_SYSFS_DEPRECATED is not set
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_RD_GZIP=y
CONFIG_RD_BZIP2=y
CONFIG_RD_LZMA=y
CONFIG_RD_XZ=y
CONFIG_RD_LZO=y
CONFIG_RD_LZ4=y
# CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE is not set
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
CONFIG_SYSCTL_EXCEPTION_TRACE=y
CONFIG_BPF=y
CONFIG_EXPERT=y
CONFIG_MULTIUSER=y
# CONFIG_SGETMASK_SYSCALL is not set
CONFIG_SYSFS_SYSCALL=y
# CONFIG_SYSCTL_SYSCALL is not set
CONFIG_FHANDLE=y
CONFIG_POSIX_TIMERS=y
CONFIG_PRINTK=y
CONFIG_PRINTK_NMI=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_FUTEX_PI=y
CONFIG_HAVE_FUTEX_CMPXCHG=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
CONFIG_ADVISE_SYSCALLS=y
CONFIG_MEMBARRIER=y
CONFIG_CHECKPOINT_RESTORE=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
# CONFIG_KALLSYMS_ABSOLUTE_PERCPU is not set
CONFIG_KALLSYMS_BASE_RELATIVE=y
CONFIG_BPF_SYSCALL=y
CONFIG_USERFAULTFD=y
# CONFIG_EMBEDDED is not set
CONFIG_HAVE_PERF_EVENTS=y
# CONFIG_PC104 is not set
#
# Kernel Performance Events And Counters
#
CONFIG_PERF_EVENTS=y
# CONFIG_DEBUG_PERF_USE_VMALLOC is not set
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_SLUB_DEBUG=y
# CONFIG_SLUB_MEMCG_SYSFS_ON is not set
# CONFIG_COMPAT_BRK is not set
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
CONFIG_SLAB_MERGE_DEFAULT=y
# CONFIG_SLAB_FREELIST_RANDOM is not set
# CONFIG_SLAB_FREELIST_HARDENED is not set
CONFIG_SLUB_CPU_PARTIAL=y
# CONFIG_SYSTEM_DATA_VERIFICATION is not set
CONFIG_PROFILING=y
CONFIG_TRACEPOINTS=y
CONFIG_CRASH_CORE=y
CONFIG_KEXEC_CORE=y
# CONFIG_OPROFILE is not set
CONFIG_HAVE_OPROFILE=y
# CONFIG_KPROBES is not set
CONFIG_JUMP_LABEL=y
CONFIG_STATIC_KEYS_SELFTEST=y
# CONFIG_UPROBES is not set
# CONFIG_HAVE_64BIT_ALIGNED_ACCESS is not set
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_ARCH_USE_BUILTIN_BSWAP=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_NMI=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_HAVE_DMA_CONTIGUOUS=y
CONFIG_GENERIC_SMP_IDLE_THREAD=y
CONFIG_ARCH_HAS_FORTIFY_SOURCE=y
CONFIG_ARCH_HAS_SET_MEMORY=y
CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_DMA_API_DEBUG=y
CONFIG_HAVE_PERF_REGS=y
CONFIG_HAVE_PERF_USER_STACK_DUMP=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG=y
CONFIG_HAVE_ALIGNED_STRUCT_PAGE=y
CONFIG_HAVE_CMPXCHG_LOCAL=y
CONFIG_HAVE_CMPXCHG_DOUBLE=y
CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION=y
CONFIG_ARCH_WANT_OLD_COMPAT_IPC=y
CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
CONFIG_SECCOMP_FILTER=y
CONFIG_HAVE_GCC_PLUGINS=y
# CONFIG_GCC_PLUGINS is not set
# CONFIG_CC_STACKPROTECTOR is not set
CONFIG_THIN_ARCHIVES=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING=y
CONFIG_ARCH_HAS_SCALED_CPUTIME=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y
CONFIG_HAVE_ARCH_SOFT_DIRTY=y
CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
CONFIG_MODULES_USE_ELF_RELA=y
CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
CONFIG_HAVE_COPY_THREAD_TLS=y
# CONFIG_HAVE_ARCH_HASH is not set
# CONFIG_ISA_BUS_API is not set
CONFIG_CLONE_BACKWARDS2=y
CONFIG_OLD_SIGSUSPEND3=y
CONFIG_OLD_SIGACTION=y
CONFIG_COMPAT_OLD_SIGACTION=y
# CONFIG_CPU_NO_EFFICIENT_FFS is not set
# CONFIG_HAVE_ARCH_VMAP_STACK is not set
# CONFIG_ARCH_OPTIONAL_KERNEL_RWX is not set
# CONFIG_ARCH_OPTIONAL_KERNEL_RWX_DEFAULT is not set
CONFIG_ARCH_HAS_STRICT_KERNEL_RWX=y
CONFIG_STRICT_KERNEL_RWX=y
CONFIG_ARCH_HAS_STRICT_MODULE_RWX=y
CONFIG_STRICT_MODULE_RWX=y
# CONFIG_REFCOUNT_FULL is not set
#
# GCOV-based kernel profiling
#
# CONFIG_GCOV_KERNEL is not set
CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
CONFIG_MODULE_FORCE_LOAD=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_MODVERSIONS=y
CONFIG_MODULE_SRCVERSION_ALL=y
# CONFIG_MODULE_SIG is not set
# CONFIG_MODULE_COMPRESS is not set
CONFIG_MODULES_TREE_LOOKUP=y
CONFIG_BLOCK=y
CONFIG_BLK_SCSI_REQUEST=y
CONFIG_BLK_DEV_BSG=y
CONFIG_BLK_DEV_BSGLIB=y
# CONFIG_BLK_DEV_INTEGRITY is not set
# CONFIG_BLK_DEV_ZONED is not set
CONFIG_BLK_DEV_THROTTLING=y
# CONFIG_BLK_DEV_THROTTLING_LOW is not set
# CONFIG_BLK_CMDLINE_PARSER is not set
CONFIG_BLK_WBT=y
# CONFIG_BLK_WBT_SQ is not set
CONFIG_BLK_WBT_MQ=y
CONFIG_BLK_DEBUG_FS=y
# CONFIG_BLK_SED_OPAL is not set
#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
# CONFIG_AIX_PARTITION is not set
# CONFIG_OSF_PARTITION is not set
# CONFIG_AMIGA_PARTITION is not set
# CONFIG_ATARI_PARTITION is not set
CONFIG_IBM_PARTITION=y
# CONFIG_MAC_PARTITION is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_BSD_DISKLABEL=y
CONFIG_MINIX_SUBPARTITION=y
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
# CONFIG_LDM_PARTITION is not set
# CONFIG_SGI_PARTITION is not set
# CONFIG_ULTRIX_PARTITION is not set
# CONFIG_SUN_PARTITION is not set
# CONFIG_KARMA_PARTITION is not set
CONFIG_EFI_PARTITION=y
# CONFIG_SYSV68_PARTITION is not set
# CONFIG_CMDLINE_PARTITION is not set
CONFIG_BLOCK_COMPAT=y
CONFIG_BLK_MQ_PCI=y
CONFIG_BLK_MQ_VIRTIO=y
CONFIG_BLK_MQ_RDMA=y
#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
CONFIG_CFQ_GROUP_IOSCHED=y
CONFIG_DEFAULT_DEADLINE=y
# CONFIG_DEFAULT_CFQ is not set
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="deadline"
# CONFIG_MQ_IOSCHED_DEADLINE is not set
CONFIG_MQ_IOSCHED_KYBER=y
CONFIG_IOSCHED_BFQ=m
# CONFIG_BFQ_GROUP_IOSCHED is not set
CONFIG_PREEMPT_NOTIFIERS=y
CONFIG_ASN1=m
CONFIG_ARCH_INLINE_SPIN_TRYLOCK=y
CONFIG_ARCH_INLINE_SPIN_TRYLOCK_BH=y
CONFIG_ARCH_INLINE_SPIN_LOCK=y
CONFIG_ARCH_INLINE_SPIN_LOCK_BH=y
CONFIG_ARCH_INLINE_SPIN_LOCK_IRQ=y
CONFIG_ARCH_INLINE_SPIN_LOCK_IRQSAVE=y
CONFIG_ARCH_INLINE_SPIN_UNLOCK=y
CONFIG_ARCH_INLINE_SPIN_UNLOCK_BH=y
CONFIG_ARCH_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE=y
CONFIG_ARCH_INLINE_READ_TRYLOCK=y
CONFIG_ARCH_INLINE_READ_LOCK=y
CONFIG_ARCH_INLINE_READ_LOCK_BH=y
CONFIG_ARCH_INLINE_READ_LOCK_IRQ=y
CONFIG_ARCH_INLINE_READ_LOCK_IRQSAVE=y
CONFIG_ARCH_INLINE_READ_UNLOCK=y
CONFIG_ARCH_INLINE_READ_UNLOCK_BH=y
CONFIG_ARCH_INLINE_READ_UNLOCK_IRQ=y
CONFIG_ARCH_INLINE_READ_UNLOCK_IRQRESTORE=y
CONFIG_ARCH_INLINE_WRITE_TRYLOCK=y
CONFIG_ARCH_INLINE_WRITE_LOCK=y
CONFIG_ARCH_INLINE_WRITE_LOCK_BH=y
CONFIG_ARCH_INLINE_WRITE_LOCK_IRQ=y
CONFIG_ARCH_INLINE_WRITE_LOCK_IRQSAVE=y
CONFIG_ARCH_INLINE_WRITE_UNLOCK=y
CONFIG_ARCH_INLINE_WRITE_UNLOCK_BH=y
CONFIG_ARCH_INLINE_WRITE_UNLOCK_IRQ=y
CONFIG_ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE=y
CONFIG_INLINE_SPIN_TRYLOCK=y
CONFIG_INLINE_SPIN_TRYLOCK_BH=y
CONFIG_INLINE_SPIN_UNLOCK_BH=y
CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE=y
CONFIG_INLINE_READ_TRYLOCK=y
CONFIG_INLINE_READ_UNLOCK=y
CONFIG_INLINE_READ_UNLOCK_BH=y
CONFIG_INLINE_READ_UNLOCK_IRQ=y
CONFIG_INLINE_READ_UNLOCK_IRQRESTORE=y
CONFIG_INLINE_WRITE_TRYLOCK=y
CONFIG_INLINE_WRITE_UNLOCK=y
CONFIG_INLINE_WRITE_UNLOCK_BH=y
CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE=y
CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
CONFIG_MUTEX_SPIN_ON_OWNER=y
CONFIG_RWSEM_SPIN_ON_OWNER=y
CONFIG_LOCK_SPIN_ON_OWNER=y
CONFIG_FREEZER=y
CONFIG_HAVE_LIVEPATCH=y
# CONFIG_LIVEPATCH is not set
#
# Processor type and features
#
CONFIG_HAVE_MARCH_Z900_FEATURES=y
CONFIG_HAVE_MARCH_Z990_FEATURES=y
CONFIG_HAVE_MARCH_Z9_109_FEATURES=y
CONFIG_HAVE_MARCH_Z10_FEATURES=y
CONFIG_HAVE_MARCH_Z196_FEATURES=y
CONFIG_HAVE_MARCH_ZEC12_FEATURES=y
CONFIG_HAVE_MARCH_Z13_FEATURES=y
# CONFIG_HAVE_MARCH_Z14_FEATURES is not set
# CONFIG_MARCH_Z900 is not set
# CONFIG_MARCH_Z990 is not set
# CONFIG_MARCH_Z9_109 is not set
# CONFIG_MARCH_Z10 is not set
# CONFIG_MARCH_Z196 is not set
# CONFIG_MARCH_ZEC12 is not set
CONFIG_MARCH_Z13=y
# CONFIG_MARCH_Z14 is not set
# CONFIG_MARCH_Z900_TUNE is not set
# CONFIG_MARCH_Z990_TUNE is not set
# CONFIG_MARCH_Z9_109_TUNE is not set
# CONFIG_MARCH_Z10_TUNE is not set
# CONFIG_MARCH_Z196_TUNE is not set
# CONFIG_MARCH_ZEC12_TUNE is not set
CONFIG_MARCH_Z13_TUNE=y
# CONFIG_MARCH_Z14_TUNE is not set
# CONFIG_TUNE_DEFAULT is not set
# CONFIG_TUNE_Z900 is not set
# CONFIG_TUNE_Z990 is not set
# CONFIG_TUNE_Z9_109 is not set
# CONFIG_TUNE_Z10 is not set
# CONFIG_TUNE_Z196 is not set
# CONFIG_TUNE_ZEC12 is not set
CONFIG_TUNE_Z13=y
# CONFIG_TUNE_Z14 is not set
CONFIG_64BIT=y
CONFIG_COMPAT=y
CONFIG_SYSVIPC_COMPAT=y
CONFIG_SMP=y
CONFIG_NR_CPUS=64
CONFIG_HOTPLUG_CPU=y
# CONFIG_NODES_SPAN_OTHER_NODES is not set
# CONFIG_NUMA is not set
CONFIG_SCHED_SMT=y
CONFIG_SCHED_MC=y
CONFIG_SCHED_BOOK=y
CONFIG_SCHED_DRAWER=y
CONFIG_SCHED_TOPOLOGY=y
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
CONFIG_PREEMPT=y
CONFIG_PREEMPT_COUNT=y
CONFIG_HZ_100=y
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=100
CONFIG_SCHED_HRTICK=y
CONFIG_ARCH_RANDOM=y
#
# Memory setup
#
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_DEFAULT=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK=y
CONFIG_FORCE_MAX_ZONEORDER=9
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_SPARSEMEM_MANUAL=y
CONFIG_SPARSEMEM=y
CONFIG_HAVE_MEMORY_PRESENT=y
CONFIG_SPARSEMEM_EXTREME=y
CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
CONFIG_SPARSEMEM_VMEMMAP=y
CONFIG_HAVE_MEMBLOCK=y
CONFIG_HAVE_MEMBLOCK_NODE_MAP=y
CONFIG_HAVE_MEMBLOCK_PHYS_MAP=y
CONFIG_NO_BOOTMEM=y
CONFIG_MEMORY_ISOLATION=y
# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
CONFIG_MEMORY_HOTPLUG=y
CONFIG_MEMORY_HOTPLUG_SPARSE=y
# CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE is not set
CONFIG_MEMORY_HOTREMOVE=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_COMPACTION=y
CONFIG_MIGRATION=y
CONFIG_PHYS_ADDR_T_64BIT=y
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_MMU_NOTIFIER=y
CONFIG_KSM=y
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
CONFIG_TRANSPARENT_HUGEPAGE=y
CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y
# CONFIG_TRANSPARENT_HUGEPAGE_MADVISE is not set
# CONFIG_ARCH_WANTS_THP_SWAP is not set
CONFIG_TRANSPARENT_HUGE_PAGECACHE=y
CONFIG_CLEANCACHE=y
CONFIG_FRONTSWAP=y
CONFIG_CMA=y
CONFIG_CMA_DEBUG=y
CONFIG_CMA_DEBUGFS=y
CONFIG_CMA_AREAS=7
CONFIG_MEM_SOFT_DIRTY=y
CONFIG_ZSWAP=y
CONFIG_ZPOOL=y
CONFIG_ZBUD=m
# CONFIG_Z3FOLD is not set
CONFIG_ZSMALLOC=m
# CONFIG_PGTABLE_MAPPING is not set
CONFIG_ZSMALLOC_STAT=y
CONFIG_ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT=y
# CONFIG_DEFERRED_STRUCT_PAGE_INIT is not set
CONFIG_IDLE_PAGE_TRACKING=y
# CONFIG_PERCPU_STATS is not set
# CONFIG_GUP_BENCHMARK is not set
CONFIG_MAX_PHYSMEM_BITS=46
CONFIG_PACK_STACK=y
CONFIG_CHECK_STACK=y
CONFIG_STACK_GUARD=256
# CONFIG_WARN_DYNAMIC_STACK is not set
#
# I/O subsystem
#
CONFIG_QDIO=y
CONFIG_PCI=y
CONFIG_PCI_NR_FUNCTIONS=64
# CONFIG_PCIEPORTBUS is not set
CONFIG_PCI_BUS_ADDR_T_64BIT=y
CONFIG_PCI_MSI=y
# CONFIG_PCI_MSI_IRQ_DOMAIN is not set
CONFIG_PCI_DEBUG=y
# CONFIG_PCI_STUB is not set
# CONFIG_PCI_IOV is not set
# CONFIG_PCI_PRI is not set
# CONFIG_PCI_PASID is not set
CONFIG_HOTPLUG_PCI=y
# CONFIG_HOTPLUG_PCI_CPCI is not set
# CONFIG_HOTPLUG_PCI_SHPC is not set
CONFIG_HOTPLUG_PCI_S390=y
#
# DesignWare PCI Core Support
#
#
# PCI host controller drivers
#
#
# PCI Endpoint
#
# CONFIG_PCI_ENDPOINT is not set
#
# PCI switch controller drivers
#
# CONFIG_PCI_SW_SWITCHTEC is not set
CONFIG_PCI_DOMAINS=y
CONFIG_HAS_IOMEM=y
CONFIG_IOMMU_HELPER=y
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_CHSC_SCH=y
CONFIG_SCM_BUS=y
CONFIG_EADM_SCH=m
CONFIG_VFIO_CCW=m
#
# Dump support
#
# CONFIG_CRASH_DUMP is not set
#
# Executable file formats / Emulations
#
CONFIG_BINFMT_ELF=y
CONFIG_COMPAT_BINFMT_ELF=y
CONFIG_ARCH_BINFMT_ELF_STATE=y
CONFIG_ELFCORE=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_BINFMT_SCRIPT=y
# CONFIG_HAVE_AOUT is not set
CONFIG_BINFMT_MISC=m
CONFIG_COREDUMP=y
CONFIG_SECCOMP=y
#
# Power Management
#
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_HIBERNATE_CALLBACKS=y
CONFIG_HIBERNATION=y
CONFIG_ARCH_SAVE_PAGE_KEYS=y
CONFIG_PM_STD_PARTITION=""
CONFIG_PM_SLEEP=y
CONFIG_PM_SLEEP_SMP=y
# CONFIG_PM_AUTOSLEEP is not set
# CONFIG_PM_WAKELOCKS is not set
CONFIG_PM=y
# CONFIG_PM_DEBUG is not set
# CONFIG_WQ_POWER_EFFICIENT_DEFAULT is not set
CONFIG_NET=y
CONFIG_NET_INGRESS=y
CONFIG_NET_EGRESS=y
#
# Networking options
#
CONFIG_PACKET=y
CONFIG_PACKET_DIAG=m
CONFIG_UNIX=y
CONFIG_UNIX_DIAG=m
# CONFIG_TLS is not set
CONFIG_XFRM=y
CONFIG_XFRM_ALGO=m
CONFIG_XFRM_USER=m
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
CONFIG_XFRM_IPCOMP=m
CONFIG_NET_KEY=m
# CONFIG_NET_KEY_MIGRATE is not set
CONFIG_IUCV=y
CONFIG_AFIUCV=m
# CONFIG_SMC is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
# CONFIG_IP_FIB_TRIE_STATS is not set
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_ROUTE_CLASSID=y
# CONFIG_IP_PNP is not set
CONFIG_NET_IPIP=m
CONFIG_NET_IPGRE_DEMUX=m
CONFIG_NET_IP_TUNNEL=m
CONFIG_NET_IPGRE=m
CONFIG_NET_IPGRE_BROADCAST=y
CONFIG_IP_MROUTE=y
CONFIG_IP_MROUTE_MULTIPLE_TABLES=y
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
CONFIG_SYN_COOKIES=y
CONFIG_NET_IPVTI=m
CONFIG_NET_UDP_TUNNEL=m
# CONFIG_NET_FOU is not set
# CONFIG_NET_FOU_IP_TUNNELS is not set
CONFIG_INET_AH=m
CONFIG_INET_ESP=m
# CONFIG_INET_ESP_OFFLOAD is not set
CONFIG_INET_IPCOMP=m
CONFIG_INET_XFRM_TUNNEL=m
CONFIG_INET_TUNNEL=m
CONFIG_INET_XFRM_MODE_TRANSPORT=m
CONFIG_INET_XFRM_MODE_TUNNEL=m
CONFIG_INET_XFRM_MODE_BEET=m
CONFIG_INET_DIAG=m
CONFIG_INET_TCP_DIAG=m
CONFIG_INET_UDP_DIAG=m
# CONFIG_INET_RAW_DIAG is not set
# CONFIG_INET_DIAG_DESTROY is not set
CONFIG_TCP_CONG_ADVANCED=y
CONFIG_TCP_CONG_BIC=m
CONFIG_TCP_CONG_CUBIC=y
CONFIG_TCP_CONG_WESTWOOD=m
CONFIG_TCP_CONG_HTCP=m
CONFIG_TCP_CONG_HSTCP=m
CONFIG_TCP_CONG_HYBLA=m
CONFIG_TCP_CONG_VEGAS=m
# CONFIG_TCP_CONG_NV is not set
CONFIG_TCP_CONG_SCALABLE=m
CONFIG_TCP_CONG_LP=m
CONFIG_TCP_CONG_VENO=m
CONFIG_TCP_CONG_YEAH=m
CONFIG_TCP_CONG_ILLINOIS=m
# CONFIG_TCP_CONG_DCTCP is not set
# CONFIG_TCP_CONG_CDG is not set
# CONFIG_TCP_CONG_BBR is not set
CONFIG_DEFAULT_CUBIC=y
# CONFIG_DEFAULT_RENO is not set
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
CONFIG_IPV6=y
CONFIG_IPV6_ROUTER_PREF=y
# CONFIG_IPV6_ROUTE_INFO is not set
# CONFIG_IPV6_OPTIMISTIC_DAD is not set
CONFIG_INET6_AH=m
CONFIG_INET6_ESP=m
# CONFIG_INET6_ESP_OFFLOAD is not set
CONFIG_INET6_IPCOMP=m
CONFIG_IPV6_MIP6=m
CONFIG_INET6_XFRM_TUNNEL=m
CONFIG_INET6_TUNNEL=m
CONFIG_INET6_XFRM_MODE_TRANSPORT=m
CONFIG_INET6_XFRM_MODE_TUNNEL=m
CONFIG_INET6_XFRM_MODE_BEET=m
CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION=m
CONFIG_IPV6_VTI=m
CONFIG_IPV6_SIT=m
# CONFIG_IPV6_SIT_6RD is not set
CONFIG_IPV6_NDISC_NODETYPE=y
CONFIG_IPV6_TUNNEL=m
CONFIG_IPV6_GRE=m
# CONFIG_IPV6_FOU is not set
# CONFIG_IPV6_FOU_TUNNEL is not set
CONFIG_IPV6_MULTIPLE_TABLES=y
CONFIG_IPV6_SUBTREES=y
# CONFIG_IPV6_MROUTE is not set
# CONFIG_IPV6_SEG6_LWTUNNEL is not set
# CONFIG_IPV6_SEG6_HMAC is not set
# CONFIG_NETLABEL is not set
CONFIG_NETWORK_SECMARK=y
CONFIG_NET_PTP_CLASSIFY=y
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
# CONFIG_NETFILTER is not set
# CONFIG_IP_DCCP is not set
CONFIG_IP_SCTP=m
# CONFIG_SCTP_DBG_OBJCNT is not set
CONFIG_SCTP_DEFAULT_COOKIE_HMAC_MD5=y
# CONFIG_SCTP_DEFAULT_COOKIE_HMAC_SHA1 is not set
# CONFIG_SCTP_DEFAULT_COOKIE_HMAC_NONE is not set
CONFIG_SCTP_COOKIE_HMAC_MD5=y
# CONFIG_SCTP_COOKIE_HMAC_SHA1 is not set
CONFIG_INET_SCTP_DIAG=m
CONFIG_RDS=m
CONFIG_RDS_RDMA=m
CONFIG_RDS_TCP=m
CONFIG_RDS_DEBUG=y
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
CONFIG_L2TP=m
CONFIG_L2TP_DEBUGFS=m
CONFIG_L2TP_V3=y
CONFIG_L2TP_IP=m
CONFIG_L2TP_ETH=m
CONFIG_STP=m
CONFIG_GARP=m
CONFIG_BRIDGE=m
CONFIG_BRIDGE_IGMP_SNOOPING=y
# CONFIG_BRIDGE_VLAN_FILTERING is not set
CONFIG_VLAN_8021Q=m
CONFIG_VLAN_8021Q_GVRP=y
# CONFIG_VLAN_8021Q_MVRP is not set
# CONFIG_DECNET is not set
CONFIG_LLC=m
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_PHONET is not set
# CONFIG_6LOWPAN is not set
# CONFIG_IEEE802154 is not set
CONFIG_NET_SCHED=y
#
# Queueing/Scheduling
#
CONFIG_NET_SCH_CBQ=m
CONFIG_NET_SCH_HTB=m
CONFIG_NET_SCH_HFSC=m
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_MULTIQ=m
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFB=m
CONFIG_NET_SCH_SFQ=m
CONFIG_NET_SCH_TEQL=m
CONFIG_NET_SCH_TBF=m
# CONFIG_NET_SCH_CBS is not set
CONFIG_NET_SCH_GRED=m
CONFIG_NET_SCH_DSMARK=m
CONFIG_NET_SCH_NETEM=m
CONFIG_NET_SCH_DRR=m
CONFIG_NET_SCH_MQPRIO=m
CONFIG_NET_SCH_CHOKE=m
CONFIG_NET_SCH_QFQ=m
CONFIG_NET_SCH_CODEL=m
CONFIG_NET_SCH_FQ_CODEL=m
# CONFIG_NET_SCH_FQ is not set
# CONFIG_NET_SCH_HHF is not set
# CONFIG_NET_SCH_PIE is not set
CONFIG_NET_SCH_INGRESS=m
CONFIG_NET_SCH_PLUG=m
# CONFIG_NET_SCH_DEFAULT is not set
#
# Classification
#
CONFIG_NET_CLS=y
CONFIG_NET_CLS_BASIC=m
CONFIG_NET_CLS_TCINDEX=m
CONFIG_NET_CLS_ROUTE4=m
CONFIG_NET_CLS_FW=m
CONFIG_NET_CLS_U32=m
CONFIG_CLS_U32_PERF=y
CONFIG_CLS_U32_MARK=y
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
CONFIG_NET_CLS_FLOW=m
CONFIG_NET_CLS_CGROUP=y
CONFIG_NET_CLS_BPF=m
# CONFIG_NET_CLS_FLOWER is not set
# CONFIG_NET_CLS_MATCHALL is not set
# CONFIG_NET_EMATCH is not set
CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=m
CONFIG_NET_ACT_GACT=m
CONFIG_GACT_PROB=y
CONFIG_NET_ACT_MIRRED=m
# CONFIG_NET_ACT_SAMPLE is not set
CONFIG_NET_ACT_NAT=m
CONFIG_NET_ACT_PEDIT=m
CONFIG_NET_ACT_SIMP=m
CONFIG_NET_ACT_SKBEDIT=m
CONFIG_NET_ACT_CSUM=m
# CONFIG_NET_ACT_VLAN is not set
# CONFIG_NET_ACT_BPF is not set
# CONFIG_NET_ACT_SKBMOD is not set
# CONFIG_NET_ACT_IFE is not set
# CONFIG_NET_ACT_TUNNEL_KEY is not set
# CONFIG_NET_CLS_IND is not set
CONFIG_NET_SCH_FIFO=y
# CONFIG_DCB is not set
CONFIG_DNS_RESOLVER=y
# CONFIG_BATMAN_ADV is not set
# CONFIG_OPENVSWITCH is not set
# CONFIG_VSOCKETS is not set
# CONFIG_NETLINK_DIAG is not set
# CONFIG_MPLS is not set
# CONFIG_NET_NSH is not set
# CONFIG_HSR is not set
# CONFIG_NET_SWITCHDEV is not set
# CONFIG_NET_L3_MASTER_DEV is not set
# CONFIG_NET_NCSI is not set
CONFIG_RPS=y
CONFIG_RFS_ACCEL=y
CONFIG_XPS=y
CONFIG_CGROUP_NET_PRIO=y
CONFIG_CGROUP_NET_CLASSID=y
CONFIG_NET_RX_BUSY_POLL=y
CONFIG_BQL=y
CONFIG_BPF_JIT=y
# CONFIG_BPF_STREAM_PARSER is not set
CONFIG_NET_FLOW_LIMIT=y
#
# Network testing
#
CONFIG_NET_PKTGEN=m
# CONFIG_NET_DROP_MONITOR is not set
# CONFIG_CAN is not set
# CONFIG_AF_RXRPC is not set
# CONFIG_AF_KCM is not set
# CONFIG_STREAM_PARSER is not set
CONFIG_FIB_RULES=y
# CONFIG_WIMAX is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set
# CONFIG_CAIF is not set
# CONFIG_CEPH_LIB is not set
# CONFIG_NFC is not set
# CONFIG_PSAMPLE is not set
# CONFIG_NET_IFE is not set
# CONFIG_LWTUNNEL is not set
CONFIG_DST_CACHE=y
CONFIG_GRO_CELLS=y
# CONFIG_NET_DEVLINK is not set
CONFIG_MAY_USE_DEVLINK=y
CONFIG_HAVE_EBPF_JIT=y
# CONFIG_PCMCIA is not set
CONFIG_CCW=y
#
# Device Drivers
#
#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER=y
CONFIG_UEVENT_HELPER_PATH=""
CONFIG_DEVTMPFS=y
# CONFIG_DEVTMPFS_MOUNT is not set
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
CONFIG_FIRMWARE_IN_KERNEL=y
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_FW_LOADER_USER_HELPER_FALLBACK is not set
CONFIG_ALLOW_DEV_COREDUMP=y
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_DEBUG_TEST_DRIVER_REMOVE is not set
# CONFIG_TEST_ASYNC_DRIVER_PROBE is not set
CONFIG_SYS_HYPERVISOR=y
# CONFIG_GENERIC_CPU_DEVICES is not set
CONFIG_GENERIC_CPU_AUTOPROBE=y
# CONFIG_DMA_SHARED_BUFFER is not set
# CONFIG_DMA_CMA is not set
#
# Bus devices
#
CONFIG_CONNECTOR=y
CONFIG_PROC_EVENTS=y
# CONFIG_MTD is not set
# CONFIG_OF is not set
# CONFIG_PARPORT is not set
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_NULL_BLK is not set
CONFIG_CDROM=m
# CONFIG_BLK_DEV_PCIESSD_MTIP32XX is not set
# CONFIG_ZRAM is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_LOOP_MIN_COUNT=8
CONFIG_BLK_DEV_CRYPTOLOOP=m
# CONFIG_BLK_DEV_DRBD is not set
CONFIG_BLK_DEV_NBD=m
# CONFIG_BLK_DEV_SKD is not set
# CONFIG_BLK_DEV_SX8 is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=32768
CONFIG_CDROM_PKTCDVD=m
CONFIG_CDROM_PKTCDVD_BUFFERS=8
# CONFIG_CDROM_PKTCDVD_WCACHE is not set
CONFIG_ATA_OVER_ETH=m
#
# S/390 block device drivers
#
CONFIG_BLK_DEV_XPRAM=m
CONFIG_DCSSBLK=m
CONFIG_DASD=y
CONFIG_DASD_PROFILE=y
CONFIG_DASD_ECKD=y
CONFIG_DASD_FBA=y
CONFIG_DASD_DIAG=y
CONFIG_DASD_EER=y
CONFIG_SCM_BLOCK=m
CONFIG_VIRTIO_BLK=y
# CONFIG_VIRTIO_BLK_SCSI is not set
# CONFIG_BLK_DEV_RBD is not set
# CONFIG_BLK_DEV_RSXX is not set
#
# NVME Support
#
# CONFIG_BLK_DEV_NVME is not set
# CONFIG_NVME_RDMA is not set
# CONFIG_NVME_FC is not set
# CONFIG_NVME_TARGET is not set
#
# Misc devices
#
# CONFIG_SENSORS_LIS3LV02D is not set
# CONFIG_DUMMY_IRQ is not set
# CONFIG_PHANTOM is not set
# CONFIG_SGI_IOC4 is not set
# CONFIG_TIFM_CORE is not set
CONFIG_ENCLOSURE_SERVICES=m
# CONFIG_HP_ILO is not set
# CONFIG_SRAM is not set
# CONFIG_PCI_ENDPOINT_TEST is not set
# CONFIG_C2PORT is not set
#
# EEPROM support
#
# CONFIG_EEPROM_93CX6 is not set
# CONFIG_CB710_CORE is not set
#
# Texas Instruments shared transport line discipline
#
#
# Altera FPGA firmware download module (requires I2C)
#
#
# Intel MIC & related support
#
#
# Intel MIC Bus Driver
#
#
# SCIF Bus Driver
#
#
# VOP Bus Driver
#
#
# Intel MIC Host Driver
#
#
# Intel MIC Card Driver
#
#
# SCIF Driver
#
#
# Intel MIC Coprocessor State Management (COSM) Drivers
#
#
# VOP Driver
#
# CONFIG_GENWQE is not set
# CONFIG_ECHO is not set
# CONFIG_CXL_BASE is not set
# CONFIG_CXL_AFU_DRIVER_OPS is not set
# CONFIG_CXL_LIB is not set
#
# SCSI device support
#
CONFIG_SCSI_MOD=y
CONFIG_RAID_ATTRS=m
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
CONFIG_SCSI_NETLINK=y
CONFIG_SCSI_MQ_DEFAULT=y
CONFIG_SCSI_PROC_FS=y
#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
CONFIG_CHR_DEV_ST=m
CONFIG_CHR_DEV_OSST=m
CONFIG_BLK_DEV_SR=m
# CONFIG_BLK_DEV_SR_VENDOR is not set
CONFIG_CHR_DEV_SG=y
CONFIG_CHR_DEV_SCH=m
CONFIG_SCSI_ENCLOSURE=m
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
# CONFIG_SCSI_SCAN_ASYNC is not set
#
# SCSI Transports
#
CONFIG_SCSI_SPI_ATTRS=m
CONFIG_SCSI_FC_ATTRS=y
CONFIG_SCSI_ISCSI_ATTRS=m
CONFIG_SCSI_SAS_ATTRS=m
CONFIG_SCSI_SAS_LIBSAS=m
CONFIG_SCSI_SAS_HOST_SMP=y
CONFIG_SCSI_SRP_ATTRS=m
CONFIG_SCSI_LOWLEVEL=y
CONFIG_ISCSI_TCP=m
# CONFIG_ISCSI_BOOT_SYSFS is not set
# CONFIG_SCSI_CXGB3_ISCSI is not set
# CONFIG_SCSI_CXGB4_ISCSI is not set
# CONFIG_SCSI_BNX2_ISCSI is not set
# CONFIG_BE2ISCSI is not set
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_HPSA is not set
# CONFIG_SCSI_3W_9XXX is not set
# CONFIG_SCSI_3W_SAS is not set
# CONFIG_SCSI_ACARD is not set
# CONFIG_SCSI_AACRAID is not set
# CONFIG_SCSI_AIC7XXX is not set
# CONFIG_SCSI_AIC79XX is not set
# CONFIG_SCSI_AIC94XX is not set
# CONFIG_SCSI_MVSAS is not set
# CONFIG_SCSI_MVUMI is not set
# CONFIG_SCSI_DPT_I2O is not set
# CONFIG_SCSI_ADVANSYS is not set
# CONFIG_SCSI_ARCMSR is not set
# CONFIG_SCSI_ESAS2R is not set
# CONFIG_MEGARAID_NEWGEN is not set
# CONFIG_MEGARAID_LEGACY is not set
# CONFIG_MEGARAID_SAS is not set
# CONFIG_SCSI_MPT3SAS is not set
# CONFIG_SCSI_MPT2SAS is not set
# CONFIG_SCSI_UFSHCD is not set
# CONFIG_SCSI_HPTIOP is not set
# CONFIG_LIBFC is not set
# CONFIG_SCSI_SNIC is not set
# CONFIG_SCSI_DMX3191D is not set
# CONFIG_SCSI_FUTURE_DOMAIN is not set
# CONFIG_SCSI_IPS is not set
# CONFIG_SCSI_INITIO is not set
# CONFIG_SCSI_INIA100 is not set
# CONFIG_SCSI_STEX is not set
# CONFIG_SCSI_SYM53C8XX_2 is not set
# CONFIG_SCSI_QLOGIC_1280 is not set
# CONFIG_SCSI_QLA_FC is not set
# CONFIG_SCSI_QLA_ISCSI is not set
# CONFIG_SCSI_LPFC is not set
# CONFIG_SCSI_DC395x is not set
# CONFIG_SCSI_AM53C974 is not set
# CONFIG_SCSI_WD719X is not set
CONFIG_SCSI_DEBUG=m
CONFIG_ZFCP=y
# CONFIG_SCSI_PMCRAID is not set
# CONFIG_SCSI_PM8001 is not set
# CONFIG_SCSI_BFA_FC is not set
CONFIG_SCSI_VIRTIO=m
# CONFIG_SCSI_CHELSIO_FCOE is not set
CONFIG_SCSI_DH=y
CONFIG_SCSI_DH_RDAC=m
CONFIG_SCSI_DH_HP_SW=m
CONFIG_SCSI_DH_EMC=m
CONFIG_SCSI_DH_ALUA=m
CONFIG_SCSI_OSD_INITIATOR=m
CONFIG_SCSI_OSD_ULD=m
CONFIG_SCSI_OSD_DPRINT_SENSE=1
# CONFIG_SCSI_OSD_DEBUG is not set
# CONFIG_ATA is not set
# CONFIG_MD is not set
# CONFIG_TARGET_CORE is not set
# CONFIG_FUSION is not set
#
# IEEE 1394 (FireWire) support
#
# CONFIG_FIREWIRE is not set
# CONFIG_FIREWIRE_NOSY is not set
CONFIG_NETDEVICES=y
CONFIG_NET_CORE=y
CONFIG_BONDING=m
CONFIG_DUMMY=m
CONFIG_EQUALIZER=m
# CONFIG_NET_FC is not set
CONFIG_IFB=m
# CONFIG_NET_TEAM is not set
CONFIG_MACVLAN=m
CONFIG_MACVTAP=m
CONFIG_VXLAN=m
# CONFIG_GENEVE is not set
# CONFIG_GTP is not set
# CONFIG_MACSEC is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
CONFIG_TUN=m
CONFIG_TAP=m
# CONFIG_TUN_VNET_CROSS_LE is not set
CONFIG_VETH=m
CONFIG_VIRTIO_NET=m
CONFIG_NLMON=m
# CONFIG_ARCNET is not set
#
# CAIF transport drivers
#
CONFIG_ETHERNET=y
# CONFIG_NET_VENDOR_3COM is not set
# CONFIG_NET_VENDOR_ADAPTEC is not set
# CONFIG_NET_VENDOR_AGERE is not set
# CONFIG_NET_VENDOR_ALACRITECH is not set
# CONFIG_NET_VENDOR_ALTEON is not set
# CONFIG_ALTERA_TSE is not set
# CONFIG_NET_VENDOR_AMAZON is not set
# CONFIG_NET_VENDOR_AMD is not set
# CONFIG_NET_VENDOR_AQUANTIA is not set
# CONFIG_NET_VENDOR_ARC is not set
# CONFIG_NET_VENDOR_ATHEROS is not set
# CONFIG_NET_VENDOR_AURORA is not set
# CONFIG_NET_CADENCE is not set
# CONFIG_NET_VENDOR_BROADCOM is not set
# CONFIG_NET_VENDOR_BROCADE is not set
# CONFIG_NET_VENDOR_CAVIUM is not set
# CONFIG_NET_VENDOR_CHELSIO is not set
# CONFIG_NET_VENDOR_CISCO is not set
# CONFIG_DNET is not set
# CONFIG_NET_VENDOR_DEC is not set
# CONFIG_NET_VENDOR_DLINK is not set
# CONFIG_NET_VENDOR_EMULEX is not set
# CONFIG_NET_VENDOR_EZCHIP is not set
# CONFIG_NET_VENDOR_EXAR is not set
# CONFIG_NET_VENDOR_HP is not set
# CONFIG_NET_VENDOR_HUAWEI is not set
# CONFIG_NET_VENDOR_INTEL is not set
# CONFIG_JME is not set
# CONFIG_NET_VENDOR_MARVELL is not set
CONFIG_NET_VENDOR_MELLANOX=y
CONFIG_MLX4_EN=m
CONFIG_MLX4_CORE=m
CONFIG_MLX4_DEBUG=y
CONFIG_MLX4_CORE_GEN2=y
# CONFIG_MLX5_CORE is not set
# CONFIG_MLXSW_CORE is not set
CONFIG_MLXFW=m
# CONFIG_NET_VENDOR_MICREL is not set
# CONFIG_NET_VENDOR_MYRI is not set
# CONFIG_FEALNX is not set
# CONFIG_NET_VENDOR_NATSEMI is not set
# CONFIG_NET_VENDOR_NETRONOME is not set
# CONFIG_NET_VENDOR_NVIDIA is not set
# CONFIG_NET_VENDOR_OKI is not set
# CONFIG_ETHOC is not set
# CONFIG_NET_PACKET_ENGINE is not set
# CONFIG_NET_VENDOR_QLOGIC is not set
# CONFIG_NET_VENDOR_QUALCOMM is not set
# CONFIG_NET_VENDOR_REALTEK is not set
# CONFIG_NET_VENDOR_RENESAS is not set
# CONFIG_NET_VENDOR_RDC is not set
# CONFIG_NET_VENDOR_ROCKER is not set
# CONFIG_NET_VENDOR_SAMSUNG is not set
# CONFIG_NET_VENDOR_SEEQ is not set
# CONFIG_NET_VENDOR_SILAN is not set
# CONFIG_NET_VENDOR_SIS is not set
# CONFIG_NET_VENDOR_SOLARFLARE is not set
# CONFIG_NET_VENDOR_SMSC is not set
# CONFIG_NET_VENDOR_STMICRO is not set
# CONFIG_NET_VENDOR_SUN is not set
# CONFIG_NET_VENDOR_TEHUTI is not set
# CONFIG_NET_VENDOR_TI is not set
# CONFIG_NET_VENDOR_VIA is not set
# CONFIG_NET_VENDOR_WIZNET is not set
# CONFIG_NET_VENDOR_SYNOPSYS is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_MDIO_DEVICE is not set
# CONFIG_MDIO_BUS is not set
# CONFIG_PHYLIB is not set
CONFIG_PPP=m
CONFIG_PPP_BSDCOMP=m
CONFIG_PPP_DEFLATE=m
# CONFIG_PPP_FILTER is not set
CONFIG_PPP_MPPE=m
# CONFIG_PPP_MULTILINK is not set
CONFIG_PPPOE=m
CONFIG_PPTP=m
CONFIG_PPPOL2TP=m
CONFIG_PPP_ASYNC=m
CONFIG_PPP_SYNC_TTY=m
# CONFIG_SLIP is not set
CONFIG_SLHC=m
#
# S/390 network device drivers
#
CONFIG_LCS=m
CONFIG_CTCM=m
CONFIG_NETIUCV=m
CONFIG_SMSGIUCV=m
CONFIG_SMSGIUCV_EVENT=m
CONFIG_QETH=y
CONFIG_QETH_L2=y
CONFIG_QETH_L3=y
CONFIG_QETH_IPV6=y
CONFIG_CCWGROUP=y
#
# Host-side USB support is needed for USB Network Adapter support
#
#
# Enable WiMAX (Networking options) to see the WiMAX drivers
#
# CONFIG_WAN is not set
# CONFIG_VMXNET3 is not set
# CONFIG_NVM is not set
#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
# CONFIG_INPUT_POLLDEV is not set
# CONFIG_INPUT_SPARSEKMAP is not set
# CONFIG_INPUT_MATRIXKMAP is not set
#
# Userland interfaces
#
# CONFIG_INPUT_MOUSEDEV is not set
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_EVDEV is not set
# CONFIG_INPUT_EVBUG is not set
#
# Input Device Drivers
#
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set
# CONFIG_RMI4_CORE is not set
#
# Hardware I/O ports
#
# CONFIG_SERIO is not set
# CONFIG_GAMEPORT is not set
#
# Character devices
#
CONFIG_TTY=y
CONFIG_UNIX98_PTYS=y
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=0
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set
# CONFIG_N_GSM is not set
# CONFIG_TRACE_SINK is not set
CONFIG_DEVMEM=y
# CONFIG_DEVKMEM is not set
#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set
#
# Non-8250 serial port support
#
# CONFIG_SERIAL_UARTLITE is not set
# CONFIG_SERIAL_JSM is not set
# CONFIG_SERIAL_SCCNXP is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_ARC is not set
# CONFIG_SERIAL_RP2 is not set
# CONFIG_SERIAL_FSL_LPUART is not set
# CONFIG_SERIAL_DEV_BUS is not set
# CONFIG_TTY_PRINTK is not set
CONFIG_HVC_DRIVER=y
CONFIG_HVC_IUCV=y
CONFIG_VIRTIO_CONSOLE=y
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=m
# CONFIG_HW_RANDOM_TIMERIOMEM is not set
CONFIG_HW_RANDOM_VIRTIO=m
CONFIG_HW_RANDOM_TPM=m
CONFIG_HW_RANDOM_S390=m
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
CONFIG_RAW_DRIVER=m
CONFIG_MAX_RAW_DEVS=256
CONFIG_HANGCHECK_TIMER=m
CONFIG_TCG_TPM=y
# CONFIG_TCG_VTPM_PROXY is not set
CONFIG_DEVPORT=y
#
# S/390 character device drivers
#
CONFIG_TN3270=y
CONFIG_TN3270_TTY=y
CONFIG_TN3270_FS=y
CONFIG_TN3270_CONSOLE=y
CONFIG_TN3215=y
CONFIG_TN3215_CONSOLE=y
CONFIG_CCW_CONSOLE=y
CONFIG_SCLP_TTY=y
CONFIG_SCLP_CONSOLE=y
CONFIG_SCLP_VT220_TTY=y
CONFIG_SCLP_VT220_CONSOLE=y
CONFIG_SCLP_ASYNC=m
CONFIG_SCLP_ASYNC_ID="000000000"
CONFIG_HMC_DRV=m
# CONFIG_SCLP_OFB is not set
CONFIG_S390_TAPE=m
#
# S/390 tape hardware support
#
CONFIG_S390_TAPE_34XX=m
CONFIG_S390_TAPE_3590=m
CONFIG_VMLOGRDR=m
CONFIG_VMCP=y
CONFIG_VMCP_CMA_SIZE=4
CONFIG_MONREADER=m
CONFIG_MONWRITER=m
CONFIG_S390_VMUR=m
# CONFIG_XILLYBUS is not set
#
# I2C support
#
# CONFIG_I2C is not set
# CONFIG_SPI is not set
# CONFIG_SPMI is not set
# CONFIG_HSI is not set
CONFIG_PPS=m
# CONFIG_PPS_DEBUG is not set
#
# PPS clients support
#
# CONFIG_PPS_CLIENT_KTIMER is not set
# CONFIG_PPS_CLIENT_LDISC is not set
# CONFIG_PPS_CLIENT_GPIO is not set
#
# PPS generators support
#
#
# PTP clock support
#
CONFIG_PTP_1588_CLOCK=m
#
# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
#
# CONFIG_PINCTRL is not set
# CONFIG_GPIOLIB is not set
# CONFIG_W1 is not set
# CONFIG_POWER_AVS is not set
# CONFIG_POWER_RESET is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
# CONFIG_THERMAL is not set
CONFIG_WATCHDOG=y
CONFIG_WATCHDOG_CORE=y
CONFIG_WATCHDOG_NOWAYOUT=y
CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED=y
# CONFIG_WATCHDOG_SYSFS is not set
#
# Watchdog Device Drivers
#
CONFIG_SOFT_WATCHDOG=m
# CONFIG_XILINX_WATCHDOG is not set
# CONFIG_CADENCE_WATCHDOG is not set
# CONFIG_DW_WATCHDOG is not set
# CONFIG_MAX63XX_WATCHDOG is not set
# CONFIG_ALIM7101_WDT is not set
# CONFIG_I6300ESB_WDT is not set
CONFIG_DIAG288_WATCHDOG=m
#
# PCI-based Watchdog Cards
#
# CONFIG_PCIPCWATCHDOG is not set
# CONFIG_WDTPCI is not set
#
# Watchdog Pretimeout Governors
#
# CONFIG_WATCHDOG_PRETIMEOUT_GOV is not set
CONFIG_SSB_POSSIBLE=y
#
# Sonics Silicon Backplane
#
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y
# CONFIG_BCMA is not set
#
# Multifunction device drivers
#
# CONFIG_MFD_CORE is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_LPC_ICH is not set
# CONFIG_LPC_SCH is not set
# CONFIG_MFD_JANZ_CMODIO is not set
# CONFIG_MFD_KEMPLD is not set
# CONFIG_MFD_MT6397 is not set
# CONFIG_MFD_RDC321X is not set
# CONFIG_MFD_RTSX_PCI is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_ABX500_CORE is not set
# CONFIG_MFD_SYSCON is not set
# CONFIG_MFD_TI_AM335X_TSCADC is not set
# CONFIG_MFD_TMIO is not set
# CONFIG_MFD_VX855 is not set
# CONFIG_REGULATOR is not set
# CONFIG_RC_CORE is not set
# CONFIG_MEDIA_SUPPORT is not set
#
# Graphics support
#
# CONFIG_DRM is not set
#
# ACP (Audio CoProcessor) Configuration
#
#
# AMD Library routines
#
# CONFIG_CHASH is not set
# CONFIG_DRM_LIB_RANDOM is not set
#
# Frame buffer Devices
#
# CONFIG_FB is not set
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
# CONFIG_VGASTATE is not set
# CONFIG_SOUND is not set
#
# HID support
#
# CONFIG_HID is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
# CONFIG_USB_SUPPORT is not set
# CONFIG_UWB is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
# CONFIG_ACCESSIBILITY is not set
CONFIG_INFINIBAND=m
# CONFIG_INFINIBAND_USER_MAD is not set
CONFIG_INFINIBAND_USER_ACCESS=m
# CONFIG_INFINIBAND_EXP_USER_ACCESS is not set
CONFIG_INFINIBAND_USER_MEM=y
CONFIG_INFINIBAND_ON_DEMAND_PAGING=y
CONFIG_INFINIBAND_ADDR_TRANS=y
CONFIG_INFINIBAND_ADDR_TRANS_CONFIGFS=y
# CONFIG_INFINIBAND_MTHCA is not set
CONFIG_MLX4_INFINIBAND=m
# CONFIG_INFINIBAND_NES is not set
# CONFIG_INFINIBAND_OCRDMA is not set
# CONFIG_INFINIBAND_IPOIB is not set
# CONFIG_INFINIBAND_SRP is not set
# CONFIG_INFINIBAND_ISER is not set
# CONFIG_INFINIBAND_RDMAVT is not set
# CONFIG_RDMA_RXE is not set
# CONFIG_DMADEVICES is not set
#
# DMABUF options
#
# CONFIG_SYNC_FILE is not set
# CONFIG_AUXDISPLAY is not set
# CONFIG_UIO is not set
CONFIG_VFIO_IOMMU_TYPE1=m
CONFIG_VFIO_VIRQFD=m
CONFIG_VFIO=m
# CONFIG_VFIO_NOIOMMU is not set
CONFIG_VFIO_PCI=m
CONFIG_VFIO_MDEV=m
# CONFIG_VFIO_MDEV_DEVICE is not set
CONFIG_IRQ_BYPASS_MANAGER=m
CONFIG_VIRT_DRIVERS=y
CONFIG_VIRTIO=y
#
# Virtio drivers
#
# CONFIG_VIRTIO_PCI is not set
# CONFIG_VIRTIO_BALLOON is not set
# CONFIG_VIRTIO_INPUT is not set
# CONFIG_VIRTIO_MMIO is not set
#
# Microsoft Hyper-V guest support
#
# CONFIG_HYPERV_TSCPAGE is not set
# CONFIG_STAGING is not set
# CONFIG_HWSPINLOCK is not set
#
# Clock Source drivers
#
# CONFIG_ATMEL_PIT is not set
# CONFIG_SH_TIMER_CMT is not set
# CONFIG_SH_TIMER_MTU2 is not set
# CONFIG_SH_TIMER_TMU is not set
# CONFIG_EM_TIMER_STI is not set
# CONFIG_MAILBOX is not set
CONFIG_IOMMU_API=y
CONFIG_IOMMU_SUPPORT=y
#
# Generic IOMMU Pagetable Support
#
CONFIG_S390_IOMMU=y
CONFIG_S390_CCW_IOMMU=y
#
# Remoteproc drivers
#
# CONFIG_REMOTEPROC is not set
#
# Rpmsg drivers
#
# CONFIG_RPMSG_VIRTIO is not set
#
# SOC (System On Chip) specific Drivers
#
#
# Amlogic SoC drivers
#
#
# Broadcom SoC drivers
#
#
# i.MX SoC drivers
#
#
# Qualcomm SoC drivers
#
# CONFIG_SUNXI_SRAM is not set
# CONFIG_SOC_TI is not set
# CONFIG_PM_DEVFREQ is not set
# CONFIG_EXTCON is not set
# CONFIG_MEMORY is not set
# CONFIG_IIO is not set
# CONFIG_NTB is not set
# CONFIG_VME_BUS is not set
# CONFIG_PWM is not set
#
# IRQ chip support
#
CONFIG_ARM_GIC_MAX_NR=1
# CONFIG_IPACK_BUS is not set
# CONFIG_RESET_CONTROLLER is not set
# CONFIG_FMC is not set
#
# PHY Subsystem
#
# CONFIG_GENERIC_PHY is not set
# CONFIG_BCM_KONA_USB2_PHY is not set
# CONFIG_PHY_PXA_28NM_HSIC is not set
# CONFIG_PHY_PXA_28NM_USB2 is not set
# CONFIG_POWERCAP is not set
# CONFIG_MCB is not set
#
# Performance monitor support
#
# CONFIG_RAS is not set
#
# Android
#
# CONFIG_ANDROID is not set
# CONFIG_LIBNVDIMM is not set
CONFIG_DAX=y
# CONFIG_DEV_DAX is not set
# CONFIG_NVMEM is not set
# CONFIG_STM is not set
# CONFIG_INTEL_TH is not set
# CONFIG_FPGA is not set
#
# FSI support
#
# CONFIG_FSI is not set
#
# File systems
#
CONFIG_FS_IOMAP=y
# CONFIG_EXT2_FS is not set
# CONFIG_EXT3_FS is not set
CONFIG_EXT4_FS=y
CONFIG_EXT4_USE_FOR_EXT2=y
CONFIG_EXT4_FS_POSIX_ACL=y
CONFIG_EXT4_FS_SECURITY=y
CONFIG_EXT4_ENCRYPTION=y
CONFIG_EXT4_FS_ENCRYPTION=y
# CONFIG_EXT4_DEBUG is not set
CONFIG_JBD2=y
# CONFIG_JBD2_DEBUG is not set
CONFIG_FS_MBCACHE=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_OCFS2_FS is not set
CONFIG_BTRFS_FS=y
CONFIG_BTRFS_FS_POSIX_ACL=y
# CONFIG_BTRFS_FS_CHECK_INTEGRITY is not set
# CONFIG_BTRFS_FS_RUN_SANITY_TESTS is not set
# CONFIG_BTRFS_DEBUG is not set
# CONFIG_BTRFS_ASSERT is not set
# CONFIG_BTRFS_FS_REF_VERIFY is not set
# CONFIG_NILFS2_FS is not set
# CONFIG_F2FS_FS is not set
# CONFIG_FS_DAX is not set
CONFIG_FS_POSIX_ACL=y
CONFIG_EXPORTFS=y
# CONFIG_EXPORTFS_BLOCK_OPS is not set
CONFIG_FILE_LOCKING=y
CONFIG_MANDATORY_FILE_LOCKING=y
CONFIG_FS_ENCRYPTION=y
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
CONFIG_FANOTIFY=y
# CONFIG_FANOTIFY_ACCESS_PERMISSIONS is not set
CONFIG_QUOTA=y
CONFIG_QUOTA_NETLINK_INTERFACE=y
CONFIG_PRINT_QUOTA_WARNING=y
# CONFIG_QUOTA_DEBUG is not set
CONFIG_QUOTA_TREE=m
CONFIG_QFMT_V1=m
CONFIG_QFMT_V2=m
CONFIG_QUOTACTL=y
CONFIG_AUTOFS4_FS=m
CONFIG_FUSE_FS=y
CONFIG_CUSE=m
CONFIG_OVERLAY_FS=m
# CONFIG_OVERLAY_FS_REDIRECT_DIR is not set
# CONFIG_OVERLAY_FS_INDEX is not set
#
# Caches
#
CONFIG_FSCACHE=m
# CONFIG_FSCACHE_STATS is not set
# CONFIG_FSCACHE_HISTOGRAM is not set
# CONFIG_FSCACHE_DEBUG is not set
# CONFIG_FSCACHE_OBJECT_LIST is not set
CONFIG_CACHEFILES=m
# CONFIG_CACHEFILES_DEBUG is not set
# CONFIG_CACHEFILES_HISTOGRAM is not set
#
# CD-ROM/DVD Filesystems
#
# CONFIG_ISO9660_FS is not set
# CONFIG_UDF_FS is not set
#
# DOS/FAT/NT Filesystems
#
# CONFIG_MSDOS_FS is not set
# CONFIG_VFAT_FS is not set
# CONFIG_NTFS_FS is not set
#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_PROC_CHILDREN=y
CONFIG_KERNFS=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_TMPFS_XATTR=y
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_ARCH_HAS_GIGANTIC_PAGE=y
CONFIG_CONFIGFS_FS=m
# CONFIG_MISC_FILESYSTEMS is not set
# CONFIG_NETWORK_FILESYSTEMS is not set
# CONFIG_NLS is not set
# CONFIG_DLM is not set
#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
#
# printk and dmesg options
#
CONFIG_PRINTK_TIME=y
CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
CONFIG_DYNAMIC_DEBUG=y
#
# Compile-time checks and compiler options
#
CONFIG_DEBUG_INFO=y
# CONFIG_DEBUG_INFO_REDUCED is not set
# CONFIG_DEBUG_INFO_SPLIT is not set
CONFIG_DEBUG_INFO_DWARF4=y
CONFIG_GDB_SCRIPTS=y
CONFIG_ENABLE_WARN_DEPRECATED=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_WARN=1024
# CONFIG_STRIP_ASM_SYMS is not set
CONFIG_READABLE_ASM=y
CONFIG_UNUSED_SYMBOLS=y
# CONFIG_PAGE_OWNER is not set
CONFIG_DEBUG_FS=y
CONFIG_HEADERS_CHECK=y
CONFIG_DEBUG_SECTION_MISMATCH=y
CONFIG_SECTION_MISMATCH_WARN_ONLY=y
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
CONFIG_MAGIC_SYSRQ=y
CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x1
CONFIG_MAGIC_SYSRQ_SERIAL=y
CONFIG_DEBUG_KERNEL=y
#
# Memory Debugging
#
CONFIG_PAGE_EXTENSION=y
CONFIG_DEBUG_PAGEALLOC=y
# CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT is not set
# CONFIG_PAGE_POISONING is not set
# CONFIG_DEBUG_PAGE_REF is not set
# CONFIG_DEBUG_RODATA_TEST is not set
CONFIG_DEBUG_OBJECTS=y
CONFIG_DEBUG_OBJECTS_SELFTEST=y
CONFIG_DEBUG_OBJECTS_FREE=y
CONFIG_DEBUG_OBJECTS_TIMERS=y
CONFIG_DEBUG_OBJECTS_WORK=y
CONFIG_DEBUG_OBJECTS_RCU_HEAD=y
CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER=y
CONFIG_DEBUG_OBJECTS_ENABLE_DEFAULT=1
CONFIG_SLUB_DEBUG_ON=y
CONFIG_SLUB_STATS=y
CONFIG_HAVE_DEBUG_KMEMLEAK=y
# CONFIG_DEBUG_KMEMLEAK is not set
CONFIG_DEBUG_STACK_USAGE=y
CONFIG_DEBUG_VM=y
CONFIG_DEBUG_VM_VMACACHE=y
CONFIG_DEBUG_VM_RB=y
CONFIG_DEBUG_VM_PGFLAGS=y
CONFIG_DEBUG_MEMORY_INIT=y
CONFIG_MEMORY_NOTIFIER_ERROR_INJECT=m
# CONFIG_DEBUG_PER_CPU_MAPS is not set
CONFIG_ARCH_HAS_KCOV=y
# CONFIG_KCOV is not set
CONFIG_DEBUG_SHIRQ=y
#
# Debug Lockups and Hangs
#
CONFIG_DETECT_HUNG_TASK=y
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=120
# CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set
CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=0
CONFIG_WQ_WATCHDOG=y
# CONFIG_PANIC_ON_OOPS is not set
CONFIG_PANIC_ON_OOPS_VALUE=0
CONFIG_PANIC_TIMEOUT=0
CONFIG_SCHED_DEBUG=y
CONFIG_SCHED_INFO=y
CONFIG_SCHEDSTATS=y
# CONFIG_SCHED_STACK_END_CHECK is not set
CONFIG_DEBUG_TIMEKEEPING=y
CONFIG_DEBUG_PREEMPT=y
#
# Lock Debugging (spinlocks, mutexes, etc...)
#
# 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_LOCK_ALLOC is not set
# CONFIG_PROVE_LOCKING is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_ATOMIC_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
# CONFIG_LOCK_TORTURE_TEST is not set
# CONFIG_WW_MUTEX_SELFTEST is not set
CONFIG_TRACE_IRQFLAGS=y
CONFIG_STACKTRACE=y
# CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
# CONFIG_DEBUG_KOBJECT is not set
# CONFIG_DEBUG_KOBJECT_RELEASE is not set
CONFIG_DEBUG_BUGVERBOSE=y
CONFIG_DEBUG_LIST=y
# CONFIG_DEBUG_PI_LIST is not set
CONFIG_DEBUG_SG=y
CONFIG_DEBUG_NOTIFIERS=y
CONFIG_DEBUG_CREDENTIALS=y
#
# RCU Debugging
#
# CONFIG_PROVE_RCU is not set
CONFIG_TORTURE_TEST=m
# CONFIG_RCU_PERF_TEST is not set
CONFIG_RCU_TORTURE_TEST=m
CONFIG_RCU_CPU_STALL_TIMEOUT=300
# CONFIG_RCU_TRACE is not set
# CONFIG_RCU_EQS_DEBUG is not set
# CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_CPU_HOTPLUG_STATE_CONTROL is not set
CONFIG_NOTIFIER_ERROR_INJECTION=m
CONFIG_PM_NOTIFIER_ERROR_INJECT=m
# CONFIG_NETDEV_NOTIFIER_ERROR_INJECT is not set
CONFIG_FAULT_INJECTION=y
CONFIG_FAILSLAB=y
CONFIG_FAIL_PAGE_ALLOC=y
CONFIG_FAIL_MAKE_REQUEST=y
CONFIG_FAIL_IO_TIMEOUT=y
CONFIG_FAIL_FUTEX=y
CONFIG_FAULT_INJECTION_DEBUG_FS=y
CONFIG_FAULT_INJECTION_STACKTRACE_FILTER=y
CONFIG_LATENCYTOP=y
CONFIG_NOP_TRACER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_TRACER_MAX_TRACE=y
CONFIG_TRACE_CLOCK=y
CONFIG_RING_BUFFER=y
CONFIG_EVENT_TRACING=y
CONFIG_CONTEXT_SWITCH_TRACER=y
CONFIG_RING_BUFFER_ALLOW_SWAP=y
CONFIG_TRACING=y
CONFIG_GENERIC_TRACER=y
CONFIG_TRACING_SUPPORT=y
CONFIG_FTRACE=y
CONFIG_FUNCTION_TRACER=y
CONFIG_FUNCTION_GRAPH_TRACER=y
# CONFIG_PREEMPTIRQ_EVENTS is not set
CONFIG_IRQSOFF_TRACER=y
CONFIG_PREEMPT_TRACER=y
CONFIG_SCHED_TRACER=y
# CONFIG_HWLAT_TRACER is not set
CONFIG_FTRACE_SYSCALLS=y
CONFIG_TRACER_SNAPSHOT=y
CONFIG_TRACER_SNAPSHOT_PER_CPU_SWAP=y
CONFIG_BRANCH_PROFILE_NONE=y
# CONFIG_PROFILE_ANNOTATED_BRANCHES is not set
# CONFIG_PROFILE_ALL_BRANCHES is not set
CONFIG_STACK_TRACER=y
CONFIG_BLK_DEV_IO_TRACE=y
# CONFIG_UPROBE_EVENTS is not set
# CONFIG_PROBE_EVENTS is not set
CONFIG_DYNAMIC_FTRACE=y
CONFIG_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_FUNCTION_PROFILER=y
CONFIG_FTRACE_MCOUNT_RECORD=y
# CONFIG_FTRACE_STARTUP_TEST is not set
CONFIG_TRACING_MAP=y
CONFIG_HIST_TRIGGERS=y
# CONFIG_TRACEPOINT_BENCHMARK is not set
# CONFIG_RING_BUFFER_BENCHMARK is not set
# CONFIG_RING_BUFFER_STARTUP_TEST is not set
# CONFIG_TRACE_EVAL_MAP_FILE is not set
CONFIG_DMA_API_DEBUG=y
#
# Runtime Testing
#
CONFIG_LKDTM=m
CONFIG_TEST_LIST_SORT=y
# CONFIG_TEST_SORT is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
CONFIG_RBTREE_TEST=y
CONFIG_INTERVAL_TREE_TEST=m
CONFIG_PERCPU_TEST=m
CONFIG_ATOMIC64_SELFTEST=y
# CONFIG_TEST_HEXDUMP is not set
CONFIG_TEST_STRING_HELPERS=y
CONFIG_TEST_KSTRTOX=y
# CONFIG_TEST_PRINTF is not set
# CONFIG_TEST_BITMAP is not set
# CONFIG_TEST_UUID is not set
# CONFIG_TEST_RHASHTABLE is not set
# CONFIG_TEST_HASH is not set
# CONFIG_TEST_LKM is not set
# CONFIG_TEST_USER_COPY is not set
CONFIG_TEST_BPF=m
# CONFIG_TEST_FIND_BIT is not set
# CONFIG_TEST_FIRMWARE is not set
# CONFIG_TEST_SYSCTL is not set
# CONFIG_TEST_UDELAY is not set
# CONFIG_TEST_STATIC_KEYS is not set
# CONFIG_TEST_KMOD is not set
# CONFIG_MEMTEST is not set
# CONFIG_BUG_ON_DATA_CORRUPTION is not set
# CONFIG_SAMPLES is not set
CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
CONFIG_ARCH_WANTS_UBSAN_NO_NULL=y
# CONFIG_UBSAN is not set
CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y
# CONFIG_STRICT_DEVMEM is not set
CONFIG_S390_PTDUMP=y
CONFIG_EARLY_PRINTK=y
#
# Security options
#
CONFIG_KEYS=y
CONFIG_KEYS_COMPAT=y
# CONFIG_PERSISTENT_KEYRINGS is not set
# CONFIG_BIG_KEYS is not set
# CONFIG_TRUSTED_KEYS is not set
CONFIG_ENCRYPTED_KEYS=y
# CONFIG_KEY_DH_OPERATIONS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
CONFIG_SECURITY=y
CONFIG_SECURITY_WRITABLE_HOOKS=y
CONFIG_SECURITYFS=y
CONFIG_SECURITY_NETWORK=y
CONFIG_SECURITY_INFINIBAND=y
# CONFIG_SECURITY_NETWORK_XFRM is not set
# CONFIG_SECURITY_PATH is not set
CONFIG_LSM_MMAP_MIN_ADDR=65536
CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR=y
# CONFIG_HARDENED_USERCOPY is not set
# CONFIG_FORTIFY_SOURCE is not set
# CONFIG_STATIC_USERMODEHELPER is not set
CONFIG_SECURITY_SELINUX=y
CONFIG_SECURITY_SELINUX_BOOTPARAM=y
CONFIG_SECURITY_SELINUX_BOOTPARAM_VALUE=0
CONFIG_SECURITY_SELINUX_DISABLE=y
CONFIG_SECURITY_SELINUX_DEVELOP=y
CONFIG_SECURITY_SELINUX_AVC_STATS=y
CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE=0
# CONFIG_SECURITY_SMACK is not set
# CONFIG_SECURITY_TOMOYO is not set
# CONFIG_SECURITY_APPARMOR is not set
# CONFIG_SECURITY_LOADPIN is not set
# CONFIG_SECURITY_YAMA is not set
CONFIG_INTEGRITY=y
# CONFIG_INTEGRITY_SIGNATURE is not set
CONFIG_INTEGRITY_AUDIT=y
CONFIG_IMA=y
CONFIG_IMA_MEASURE_PCR_IDX=10
CONFIG_IMA_LSM_RULES=y
# CONFIG_IMA_TEMPLATE is not set
CONFIG_IMA_NG_TEMPLATE=y
# CONFIG_IMA_SIG_TEMPLATE is not set
CONFIG_IMA_DEFAULT_TEMPLATE="ima-ng"
CONFIG_IMA_DEFAULT_HASH_SHA1=y
# CONFIG_IMA_DEFAULT_HASH_SHA256 is not set
CONFIG_IMA_DEFAULT_HASH="sha1"
# CONFIG_IMA_WRITE_POLICY is not set
# CONFIG_IMA_READ_POLICY is not set
CONFIG_IMA_APPRAISE=y
# CONFIG_IMA_APPRAISE_BOOTPARAM is not set
# CONFIG_EVM is not set
CONFIG_DEFAULT_SECURITY_SELINUX=y
# CONFIG_DEFAULT_SECURITY_DAC is not set
CONFIG_DEFAULT_SECURITY="selinux"
CONFIG_XOR_BLOCKS=y
CONFIG_CRYPTO=y
#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_BLKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_RNG_DEFAULT=y
CONFIG_CRYPTO_AKCIPHER2=y
CONFIG_CRYPTO_AKCIPHER=m
CONFIG_CRYPTO_KPP2=y
CONFIG_CRYPTO_KPP=m
CONFIG_CRYPTO_ACOMP2=y
CONFIG_CRYPTO_RSA=m
CONFIG_CRYPTO_DH=m
CONFIG_CRYPTO_ECDH=m
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
CONFIG_CRYPTO_USER=m
CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
CONFIG_CRYPTO_GF128MUL=y
CONFIG_CRYPTO_NULL=y
CONFIG_CRYPTO_NULL2=y
# CONFIG_CRYPTO_PCRYPT is not set
CONFIG_CRYPTO_WORKQUEUE=y
CONFIG_CRYPTO_CRYPTD=m
# CONFIG_CRYPTO_MCRYPTD is not set
CONFIG_CRYPTO_AUTHENC=m
CONFIG_CRYPTO_TEST=m
CONFIG_CRYPTO_ENGINE=m
#
# Authenticated Encryption with Associated Data
#
CONFIG_CRYPTO_CCM=m
CONFIG_CRYPTO_GCM=m
CONFIG_CRYPTO_CHACHA20POLY1305=m
CONFIG_CRYPTO_SEQIV=y
CONFIG_CRYPTO_ECHAINIV=m
#
# Block modes
#
CONFIG_CRYPTO_CBC=y
CONFIG_CRYPTO_CTR=y
CONFIG_CRYPTO_CTS=y
CONFIG_CRYPTO_ECB=y
CONFIG_CRYPTO_LRW=m
CONFIG_CRYPTO_PCBC=m
CONFIG_CRYPTO_XTS=y
CONFIG_CRYPTO_KEYWRAP=m
#
# Hash modes
#
# CONFIG_CRYPTO_CMAC is not set
CONFIG_CRYPTO_HMAC=y
CONFIG_CRYPTO_XCBC=m
CONFIG_CRYPTO_VMAC=m
#
# Digest
#
CONFIG_CRYPTO_CRC32C=y
CONFIG_CRYPTO_CRC32=m
CONFIG_CRYPTO_CRCT10DIF=m
CONFIG_CRYPTO_GHASH=m
CONFIG_CRYPTO_POLY1305=m
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_MICHAEL_MIC=m
CONFIG_CRYPTO_RMD128=m
CONFIG_CRYPTO_RMD160=m
CONFIG_CRYPTO_RMD256=m
CONFIG_CRYPTO_RMD320=m
CONFIG_CRYPTO_SHA1=y
CONFIG_CRYPTO_SHA256=y
CONFIG_CRYPTO_SHA512=m
# CONFIG_CRYPTO_SHA3 is not set
# CONFIG_CRYPTO_SM3 is not set
CONFIG_CRYPTO_TGR192=m
CONFIG_CRYPTO_WP512=m
#
# Ciphers
#
CONFIG_CRYPTO_AES=y
# CONFIG_CRYPTO_AES_TI is not set
CONFIG_CRYPTO_ANUBIS=m
CONFIG_CRYPTO_ARC4=m
CONFIG_CRYPTO_BLOWFISH=m
CONFIG_CRYPTO_BLOWFISH_COMMON=m
CONFIG_CRYPTO_CAMELLIA=m
CONFIG_CRYPTO_CAST_COMMON=m
CONFIG_CRYPTO_CAST5=m
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_DES=m
CONFIG_CRYPTO_FCRYPT=m
CONFIG_CRYPTO_KHAZAD=m
CONFIG_CRYPTO_SALSA20=m
CONFIG_CRYPTO_CHACHA20=m
CONFIG_CRYPTO_SEED=m
CONFIG_CRYPTO_SERPENT=m
CONFIG_CRYPTO_TEA=m
CONFIG_CRYPTO_TWOFISH=m
CONFIG_CRYPTO_TWOFISH_COMMON=m
#
# Compression
#
CONFIG_CRYPTO_DEFLATE=m
CONFIG_CRYPTO_LZO=y
CONFIG_CRYPTO_842=m
CONFIG_CRYPTO_LZ4=m
CONFIG_CRYPTO_LZ4HC=m
#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
CONFIG_CRYPTO_DRBG_MENU=y
CONFIG_CRYPTO_DRBG_HMAC=y
# CONFIG_CRYPTO_DRBG_HASH is not set
# CONFIG_CRYPTO_DRBG_CTR is not set
CONFIG_CRYPTO_DRBG=y
CONFIG_CRYPTO_JITTERENTROPY=y
CONFIG_CRYPTO_USER_API=m
CONFIG_CRYPTO_USER_API_HASH=m
CONFIG_CRYPTO_USER_API_SKCIPHER=m
CONFIG_CRYPTO_USER_API_RNG=m
CONFIG_CRYPTO_USER_API_AEAD=m
CONFIG_CRYPTO_HASH_INFO=y
CONFIG_CRYPTO_HW=y
CONFIG_ZCRYPT=m
CONFIG_PKEY=m
# CONFIG_CRYPTO_PAES_S390 is not set
CONFIG_CRYPTO_SHA1_S390=m
CONFIG_CRYPTO_SHA256_S390=m
CONFIG_CRYPTO_SHA512_S390=m
CONFIG_CRYPTO_DES_S390=m
CONFIG_CRYPTO_AES_S390=m
CONFIG_S390_PRNG=m
CONFIG_CRYPTO_GHASH_S390=m
CONFIG_CRYPTO_CRC32_S390=y
# CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API_DESC is not set
# CONFIG_CRYPTO_DEV_NITROX_CNN55XX is not set
CONFIG_CRYPTO_DEV_VIRTIO=m
CONFIG_ASYMMETRIC_KEY_TYPE=y
CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE=m
CONFIG_X509_CERTIFICATE_PARSER=m
# CONFIG_PKCS7_MESSAGE_PARSER is not set
#
# Certificates for signature checking
#
# CONFIG_SYSTEM_TRUSTED_KEYRING is not set
# CONFIG_SYSTEM_BLACKLIST_KEYRING is not set
CONFIG_BINARY_PRINTF=y
#
# Library routines
#
CONFIG_RAID6_PQ=y
CONFIG_BITREVERSE=y
# CONFIG_HAVE_ARCH_BITREVERSE is not set
CONFIG_GENERIC_NET_UTILS=y
CONFIG_GENERIC_FIND_FIRST_BIT=y
CONFIG_GENERIC_IO=y
CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
CONFIG_CRC_CCITT=m
CONFIG_CRC16=y
CONFIG_CRC_T10DIF=m
CONFIG_CRC_ITU_T=m
CONFIG_CRC32=y
# CONFIG_CRC32_SELFTEST is not set
CONFIG_CRC32_SLICEBY8=y
# CONFIG_CRC32_SLICEBY4 is not set
# CONFIG_CRC32_SARWATE is not set
# CONFIG_CRC32_BIT is not set
# CONFIG_CRC4 is not set
CONFIG_CRC7=m
CONFIG_LIBCRC32C=y
CONFIG_CRC8=m
CONFIG_XXHASH=y
# CONFIG_AUDIT_ARCH_COMPAT_GENERIC is not set
# CONFIG_RANDOM32_SELFTEST is not set
CONFIG_842_COMPRESS=m
CONFIG_842_DECOMPRESS=m
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_LZO_COMPRESS=y
CONFIG_LZO_DECOMPRESS=y
CONFIG_LZ4_COMPRESS=m
CONFIG_LZ4HC_COMPRESS=m
CONFIG_LZ4_DECOMPRESS=y
CONFIG_ZSTD_COMPRESS=y
CONFIG_ZSTD_DECOMPRESS=y
CONFIG_XZ_DEC=y
CONFIG_XZ_DEC_X86=y
CONFIG_XZ_DEC_POWERPC=y
CONFIG_XZ_DEC_IA64=y
CONFIG_XZ_DEC_ARM=y
CONFIG_XZ_DEC_ARMTHUMB=y
CONFIG_XZ_DEC_SPARC=y
CONFIG_XZ_DEC_BCJ=y
# CONFIG_XZ_DEC_TEST is not set
CONFIG_DECOMPRESS_GZIP=y
CONFIG_DECOMPRESS_BZIP2=y
CONFIG_DECOMPRESS_LZMA=y
CONFIG_DECOMPRESS_XZ=y
CONFIG_DECOMPRESS_LZO=y
CONFIG_DECOMPRESS_LZ4=y
CONFIG_INTERVAL_TREE=y
CONFIG_RADIX_TREE_MULTIORDER=y
CONFIG_ASSOCIATIVE_ARRAY=y
CONFIG_HAS_DMA=y
CONFIG_DMA_NOOP_OPS=y
# CONFIG_DMA_VIRT_OPS is not set
CONFIG_CPU_RMAP=y
CONFIG_DQL=y
CONFIG_GLOB=y
# CONFIG_GLOB_SELFTEST is not set
CONFIG_NLATTR=y
CONFIG_CLZ_TAB=y
CONFIG_CORDIC=m
# CONFIG_DDR is not set
CONFIG_IRQ_POLL=y
CONFIG_MPILIB=m
CONFIG_OID_REGISTRY=m
# CONFIG_SG_SPLIT is not set
CONFIG_SG_POOL=y
CONFIG_ARCH_HAS_SG_CHAIN=y
CONFIG_SBITMAP=y
# CONFIG_STRING_SELFTEST is not set
#
# Virtualization
#
CONFIG_PFAULT=y
# CONFIG_CMM is not set
# CONFIG_APPLDATA_BASE is not set
CONFIG_S390_HYPFS_FS=y
CONFIG_HAVE_KVM=y
CONFIG_HAVE_KVM_IRQCHIP=y
CONFIG_HAVE_KVM_IRQFD=y
CONFIG_HAVE_KVM_IRQ_ROUTING=y
CONFIG_HAVE_KVM_EVENTFD=y
CONFIG_KVM_ASYNC_PF=y
CONFIG_KVM_ASYNC_PF_SYNC=y
CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT=y
CONFIG_KVM_VFIO=y
CONFIG_HAVE_KVM_INVALID_WAKEUPS=y
CONFIG_VIRTUALIZATION=y
CONFIG_KVM=m
CONFIG_KVM_S390_UCONTROL=y
CONFIG_VHOST_NET=m
CONFIG_VHOST=m
# CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set
CONFIG_S390_GUEST=y
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [bisected] system hang after boot
2017-11-22 17:46 [bisected] system hang after boot Sebastian Ott
@ 2017-11-22 18:26 ` Will Deacon
2017-11-22 18:54 ` Sebastian Ott
2017-11-22 20:22 ` Peter Zijlstra
0 siblings, 2 replies; 14+ messages in thread
From: Will Deacon @ 2017-11-22 18:26 UTC (permalink / raw)
To: Sebastian Ott
Cc: Peter Zijlstra, Ingo Molnar, Martin Schwidefsky, Heiko Carstens,
linux-kernel
Hi Sebastian,
Thanks for the report.
On Wed, Nov 22, 2017 at 06:46:01PM +0100, Sebastian Ott wrote:
> One of my test systems (s390) hangs after boot. One of the cpus is idle
> the other is in arch_spin_relax. Bisect pointed to this one:
>
> a8a217c22116eff6c120d753c9934089fb229af0 is the first bad commit
> commit a8a217c22116eff6c120d753c9934089fb229af0
> Author: Will Deacon <will.deacon@arm.com>
> Date: Tue Oct 3 19:25:27 2017 +0100
>
> locking/core: Remove {read,spin,write}_can_lock()
>
> Outside of the locking code itself, {read,spin,write}_can_lock() have no
> users in tree. Apparmor (the last remaining user of write_can_lock()) got
> moved over to lockdep by the previous patch.
>
> This patch removes the use of {read,spin,write}_can_lock() from the
> BUILD_LOCK_OPS macro, deferring to the trylock operation for testing the
> lock status, and subsequently removes the unused macros altogether. They
> aren't guaranteed to work in a concurrent environment and can give
> incorrect results in the case of qrwlock.
>
> Signed-off-by: Will Deacon <will.deacon@arm.com>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> Cc: Linus Torvalds <torvalds@linux-foundation.org>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: paulmck@linux.vnet.ibm.com
> Link: http://lkml.kernel.org/r/1507055129-12300-2-git-send-email-will.deacon@arm.com
> Signed-off-by: Ingo Molnar <mingo@kernel.org>
>
>
> Bisect log and config attached. The same config but with lockdep enabled
> works ok.
I suspect this is related to CONFIG_GENERIC_LOCKBREAK and the use of the
lock->break_lock field when that is enabled. I've always been suspicious
about the lack of ordering guarantees there, and I think my patch makes
that worse.
The old code was:
#define BUILD_LOCK_OPS(op, locktype) \
void __lockfunc __raw_##op##_lock(locktype##_t *lock) \
{ \
for (;;) { \
preempt_disable(); \
if (likely(do_raw_##op##_trylock(lock))) \
break; \
preempt_enable(); \
\
if (!(lock)->break_lock) \
(lock)->break_lock = 1; \
while (!raw_##op##_can_lock(lock) && (lock)->break_lock)\
arch_##op##_relax(&lock->raw_lock); \
} \
(lock)->break_lock = 0; \
} \
which is dodgy for a few reasons:
1. There is a write-write race on break_lock, so if >1 CPU tries to take
lock concurrently then break_lock can end up as either 0 or 1.
2. break_lock is just a plain variable, so it can happily sit in a
local store buffer (for a finite time), meaning that waiters will
almost certainly see it as 1 in the while loop and the lock holder
will almost certainly see it as 0
Now, the raw_##op##_can_lock macro is also problematic, which is why I
removed it: it suffers from (2) above, but not from (1) and will eventually
cause the waiters to break redo the trylock() once the unlockers store
buffer has drained.
The new code removes the raw_##op##_can_lock, so the waiters get stuck.
Now, I can't see what the break_lock is doing here other than causing
problems. Is there a good reason for it, or can you just try removing it
altogether? Patch below.
Will
--->8
diff --git a/include/linux/rwlock_types.h b/include/linux/rwlock_types.h
index cc0072e93e36..857a72ceb794 100644
--- a/include/linux/rwlock_types.h
+++ b/include/linux/rwlock_types.h
@@ -10,9 +10,6 @@
*/
typedef struct {
arch_rwlock_t raw_lock;
-#ifdef CONFIG_GENERIC_LOCKBREAK
- unsigned int break_lock;
-#endif
#ifdef CONFIG_DEBUG_SPINLOCK
unsigned int magic, owner_cpu;
void *owner;
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index a39186194cd6..3bf273538840 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -107,16 +107,11 @@ do { \
#define raw_spin_is_locked(lock) arch_spin_is_locked(&(lock)->raw_lock)
-#ifdef CONFIG_GENERIC_LOCKBREAK
-#define raw_spin_is_contended(lock) ((lock)->break_lock)
-#else
-
#ifdef arch_spin_is_contended
#define raw_spin_is_contended(lock) arch_spin_is_contended(&(lock)->raw_lock)
#else
#define raw_spin_is_contended(lock) (((void)(lock), 0))
#endif /*arch_spin_is_contended*/
-#endif
/*
* This barrier must provide two things:
diff --git a/include/linux/spinlock_types.h b/include/linux/spinlock_types.h
index 73548eb13a5d..24b4e6f2c1a2 100644
--- a/include/linux/spinlock_types.h
+++ b/include/linux/spinlock_types.h
@@ -19,9 +19,6 @@
typedef struct raw_spinlock {
arch_spinlock_t raw_lock;
-#ifdef CONFIG_GENERIC_LOCKBREAK
- unsigned int break_lock;
-#endif
#ifdef CONFIG_DEBUG_SPINLOCK
unsigned int magic, owner_cpu;
void *owner;
diff --git a/kernel/locking/spinlock.c b/kernel/locking/spinlock.c
index 1fd1a7543cdd..7d0a58399c1d 100644
--- a/kernel/locking/spinlock.c
+++ b/kernel/locking/spinlock.c
@@ -65,13 +65,8 @@ void __lockfunc __raw_##op##_lock(locktype##_t *lock) \
if (likely(do_raw_##op##_trylock(lock))) \
break; \
preempt_enable(); \
- \
- if (!(lock)->break_lock) \
- (lock)->break_lock = 1; \
- while ((lock)->break_lock) \
- arch_##op##_relax(&lock->raw_lock); \
+ arch_##op##_relax(&lock->raw_lock); \
} \
- (lock)->break_lock = 0; \
} \
\
unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock) \
@@ -85,13 +80,8 @@ unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock) \
break; \
local_irq_restore(flags); \
preempt_enable(); \
- \
- if (!(lock)->break_lock) \
- (lock)->break_lock = 1; \
- while ((lock)->break_lock) \
- arch_##op##_relax(&lock->raw_lock); \
+ arch_##op##_relax(&lock->raw_lock); \
} \
- (lock)->break_lock = 0; \
return flags; \
} \
\
^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [bisected] system hang after boot
2017-11-22 18:26 ` Will Deacon
@ 2017-11-22 18:54 ` Sebastian Ott
2017-11-22 19:10 ` Will Deacon
2017-11-22 20:22 ` Peter Zijlstra
1 sibling, 1 reply; 14+ messages in thread
From: Sebastian Ott @ 2017-11-22 18:54 UTC (permalink / raw)
To: Will Deacon
Cc: Peter Zijlstra, Ingo Molnar, Martin Schwidefsky, Heiko Carstens,
linux-kernel
Hello Will,
On Wed, 22 Nov 2017, Will Deacon wrote:
> Now, I can't see what the break_lock is doing here other than causing
> problems. Is there a good reason for it, or can you just try removing it
> altogether? Patch below.
With your patch applied the system is able to boot again.
I did some quick additional tests - seems to be working fine.
Thanks,
Sebastian
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [bisected] system hang after boot
2017-11-22 18:54 ` Sebastian Ott
@ 2017-11-22 19:10 ` Will Deacon
0 siblings, 0 replies; 14+ messages in thread
From: Will Deacon @ 2017-11-22 19:10 UTC (permalink / raw)
To: Sebastian Ott
Cc: Peter Zijlstra, Ingo Molnar, Martin Schwidefsky, Heiko Carstens,
linux-kernel
Hi Sebastian,
On Wed, Nov 22, 2017 at 07:54:54PM +0100, Sebastian Ott wrote:
> On Wed, 22 Nov 2017, Will Deacon wrote:
> > Now, I can't see what the break_lock is doing here other than causing
> > problems. Is there a good reason for it, or can you just try removing it
> > altogether? Patch below.
>
> With your patch applied the system is able to boot again.
> I did some quick additional tests - seems to be working fine.
That was quick, thanks!
So the million dollar question is: does somebody care about the break_lock
field and, if so, why?
Will
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [bisected] system hang after boot
2017-11-22 18:26 ` Will Deacon
2017-11-22 18:54 ` Sebastian Ott
@ 2017-11-22 20:22 ` Peter Zijlstra
2017-11-27 11:49 ` Will Deacon
1 sibling, 1 reply; 14+ messages in thread
From: Peter Zijlstra @ 2017-11-22 20:22 UTC (permalink / raw)
To: Will Deacon
Cc: Sebastian Ott, Ingo Molnar, Martin Schwidefsky, Heiko Carstens,
linux-kernel
On Wed, Nov 22, 2017 at 06:26:59PM +0000, Will Deacon wrote:
> Now, I can't see what the break_lock is doing here other than causing
> problems. Is there a good reason for it, or can you just try removing it
> altogether? Patch below.
The main use is spin_is_contended(), which in turn ends up used in
__cond_resched_lock() through spin_needbreak().
This allows better lock wait times for PREEMPT kernels on platforms
where the lock implementation itself cannot provide 'contended' state.
In that capacity the write-write race shouldn't be a problem though.
That said, I'd not be horribly sad to see this go, I've always found it
to be quite the ugly hack and taking it out should provide some
incentive for better lock implementations for the archs relying on this.
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [bisected] system hang after boot
2017-11-22 20:22 ` Peter Zijlstra
@ 2017-11-27 11:49 ` Will Deacon
2017-11-27 12:45 ` Will Deacon
2017-11-27 12:49 ` Martin Schwidefsky
0 siblings, 2 replies; 14+ messages in thread
From: Will Deacon @ 2017-11-27 11:49 UTC (permalink / raw)
To: Peter Zijlstra
Cc: Sebastian Ott, Ingo Molnar, Martin Schwidefsky, Heiko Carstens,
linux-kernel
Hi Peter,
On Wed, Nov 22, 2017 at 09:22:17PM +0100, Peter Zijlstra wrote:
> On Wed, Nov 22, 2017 at 06:26:59PM +0000, Will Deacon wrote:
>
> > Now, I can't see what the break_lock is doing here other than causing
> > problems. Is there a good reason for it, or can you just try removing it
> > altogether? Patch below.
>
> The main use is spin_is_contended(), which in turn ends up used in
> __cond_resched_lock() through spin_needbreak().
>
> This allows better lock wait times for PREEMPT kernels on platforms
> where the lock implementation itself cannot provide 'contended' state.
>
> In that capacity the write-write race shouldn't be a problem though.
I'm not sure why it isn't a problem: given that the break_lock variable
can read as 1 for a lock that is no longer contended and 0 for a lock that
is currently contended, then the __cond_resched_lock is likely to see a
value of 0 (i.e. spin_needbreak always return false) more often than no
since it's checked by the lock holder.
> That said, I'd not be horribly sad to see this go, I've always found it
> to be quite the ugly hack and taking it out should provide some
> incentive for better lock implementations for the archs relying on this.
Right, and they can always implement arch_spin_is_contended if they have
a good way to do it.
I'll post this diff as a full patch, since it's clearly needed to get some
s390 systems booting against with 4.15.
Will
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [bisected] system hang after boot
2017-11-27 11:49 ` Will Deacon
@ 2017-11-27 12:45 ` Will Deacon
2017-11-27 13:05 ` Sebastian Ott
2017-11-27 12:49 ` Martin Schwidefsky
1 sibling, 1 reply; 14+ messages in thread
From: Will Deacon @ 2017-11-27 12:45 UTC (permalink / raw)
To: Peter Zijlstra
Cc: Sebastian Ott, Ingo Molnar, Martin Schwidefsky, Heiko Carstens,
linux-kernel
Me again...
On Mon, Nov 27, 2017 at 11:49:47AM +0000, Will Deacon wrote:
> On Wed, Nov 22, 2017 at 09:22:17PM +0100, Peter Zijlstra wrote:
> > On Wed, Nov 22, 2017 at 06:26:59PM +0000, Will Deacon wrote:
> >
> > > Now, I can't see what the break_lock is doing here other than causing
> > > problems. Is there a good reason for it, or can you just try removing it
> > > altogether? Patch below.
> >
> > The main use is spin_is_contended(), which in turn ends up used in
> > __cond_resched_lock() through spin_needbreak().
> >
> > This allows better lock wait times for PREEMPT kernels on platforms
> > where the lock implementation itself cannot provide 'contended' state.
> >
> > In that capacity the write-write race shouldn't be a problem though.
>
> I'm not sure why it isn't a problem: given that the break_lock variable
> can read as 1 for a lock that is no longer contended and 0 for a lock that
> is currently contended, then the __cond_resched_lock is likely to see a
> value of 0 (i.e. spin_needbreak always return false) more often than no
> since it's checked by the lock holder.
>
> > That said, I'd not be horribly sad to see this go, I've always found it
> > to be quite the ugly hack and taking it out should provide some
> > incentive for better lock implementations for the archs relying on this.
>
> Right, and they can always implement arch_spin_is_contended if they have
> a good way to do it.
>
> I'll post this diff as a full patch, since it's clearly needed to get some
> s390 systems booting against with 4.15.
In writing up the patch, I realised that I might be being a bit too purist
about what we can actually rely on here, particularly as GENERIC_LOCKBREAK
isn't widely selected. I'm still suspicious, but perhaps on the architectures
that *do* select it, then the propagation of the lock_break variable between
CPUs works out because of the barriers in lock()/trylock(), and that's
sufficient for a "good enough" spin_is_contended() implementation.
Sebastian: could you try the diff below, please? If that fixes s390, then
we can debate the merits of GENERIC_LOCKBREAK independently of fixing this
issue.
Thanks,
Will
--->8
diff --git a/kernel/locking/spinlock.c b/kernel/locking/spinlock.c
index 1fd1a7543cdd..0ebb253e2199 100644
--- a/kernel/locking/spinlock.c
+++ b/kernel/locking/spinlock.c
@@ -68,8 +68,8 @@ void __lockfunc __raw_##op##_lock(locktype##_t *lock) \
\
if (!(lock)->break_lock) \
(lock)->break_lock = 1; \
- while ((lock)->break_lock) \
- arch_##op##_relax(&lock->raw_lock); \
+ \
+ arch_##op##_relax(&lock->raw_lock); \
} \
(lock)->break_lock = 0; \
} \
@@ -88,8 +88,8 @@ unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock) \
\
if (!(lock)->break_lock) \
(lock)->break_lock = 1; \
- while ((lock)->break_lock) \
- arch_##op##_relax(&lock->raw_lock); \
+ \
+ arch_##op##_relax(&lock->raw_lock); \
} \
(lock)->break_lock = 0; \
return flags; \
^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [bisected] system hang after boot
2017-11-27 11:49 ` Will Deacon
2017-11-27 12:45 ` Will Deacon
@ 2017-11-27 12:49 ` Martin Schwidefsky
2017-11-27 12:54 ` Will Deacon
1 sibling, 1 reply; 14+ messages in thread
From: Martin Schwidefsky @ 2017-11-27 12:49 UTC (permalink / raw)
To: Will Deacon
Cc: Peter Zijlstra, Sebastian Ott, Ingo Molnar, Heiko Carstens,
linux-kernel
On Mon, 27 Nov 2017 11:49:48 +0000
Will Deacon <will.deacon@arm.com> wrote:
> Hi Peter,
>
> On Wed, Nov 22, 2017 at 09:22:17PM +0100, Peter Zijlstra wrote:
> > On Wed, Nov 22, 2017 at 06:26:59PM +0000, Will Deacon wrote:
> >
> > > Now, I can't see what the break_lock is doing here other than causing
> > > problems. Is there a good reason for it, or can you just try removing it
> > > altogether? Patch below.
> >
> > The main use is spin_is_contended(), which in turn ends up used in
> > __cond_resched_lock() through spin_needbreak().
> >
> > This allows better lock wait times for PREEMPT kernels on platforms
> > where the lock implementation itself cannot provide 'contended' state.
> >
> > In that capacity the write-write race shouldn't be a problem though.
>
> I'm not sure why it isn't a problem: given that the break_lock variable
> can read as 1 for a lock that is no longer contended and 0 for a lock that
> is currently contended, then the __cond_resched_lock is likely to see a
> value of 0 (i.e. spin_needbreak always return false) more often than no
> since it's checked by the lock holder.
Grepping for 'break_lock' the two locking blueprints are the only places
where the field is written to. Unless I am blind, the associated unlock
functions do *not* reset 'break_lock'.
Without the raw_##op##_can_lock(lock) check the first of the blueprints
now looks like this:
void __lockfunc __raw_##op##_lock(locktype##_t *lock) \
{ \
for (;;) { \
preempt_disable(); \
if (likely(do_raw_##op##_trylock(lock))) \
break; \
preempt_enable(); \
\
if (!(lock)->break_lock) \
(lock)->break_lock = 1; \
while ((lock)->break_lock) \
arch_##op##_relax(&lock->raw_lock); \
} \
(lock)->break_lock = 0; \
} \
All it takes to create an endless loop is two CPUs, the first acquired the
lock and the second tries to get the lock. After the unsuccessful trylock
of the second CPU, the first CPU releases the lock and never tries to take
it again. The second CPU will be stuck in an endless loop.
I guess my best course of action is to remove GENERIC_LOCKBREAK from
arch/s390/Kconfig to avoid this construct altogether. Let us see what
breaks if I do that ..
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [bisected] system hang after boot
2017-11-27 12:49 ` Martin Schwidefsky
@ 2017-11-27 12:54 ` Will Deacon
2017-11-27 13:00 ` Martin Schwidefsky
0 siblings, 1 reply; 14+ messages in thread
From: Will Deacon @ 2017-11-27 12:54 UTC (permalink / raw)
To: Martin Schwidefsky
Cc: Peter Zijlstra, Sebastian Ott, Ingo Molnar, Heiko Carstens,
linux-kernel
Hi Martin,
On Mon, Nov 27, 2017 at 01:49:18PM +0100, Martin Schwidefsky wrote:
> On Mon, 27 Nov 2017 11:49:48 +0000
> Will Deacon <will.deacon@arm.com> wrote:
> > On Wed, Nov 22, 2017 at 09:22:17PM +0100, Peter Zijlstra wrote:
> > > On Wed, Nov 22, 2017 at 06:26:59PM +0000, Will Deacon wrote:
> > >
> > > > Now, I can't see what the break_lock is doing here other than causing
> > > > problems. Is there a good reason for it, or can you just try removing it
> > > > altogether? Patch below.
> > >
> > > The main use is spin_is_contended(), which in turn ends up used in
> > > __cond_resched_lock() through spin_needbreak().
> > >
> > > This allows better lock wait times for PREEMPT kernels on platforms
> > > where the lock implementation itself cannot provide 'contended' state.
> > >
> > > In that capacity the write-write race shouldn't be a problem though.
> >
> > I'm not sure why it isn't a problem: given that the break_lock variable
> > can read as 1 for a lock that is no longer contended and 0 for a lock that
> > is currently contended, then the __cond_resched_lock is likely to see a
> > value of 0 (i.e. spin_needbreak always return false) more often than no
> > since it's checked by the lock holder.
>
> Grepping for 'break_lock' the two locking blueprints are the only places
> where the field is written to. Unless I am blind, the associated unlock
> functions do *not* reset 'break_lock'.
>
> Without the raw_##op##_can_lock(lock) check the first of the blueprints
> now looks like this:
>
> void __lockfunc __raw_##op##_lock(locktype##_t *lock) \
> { \
> for (;;) { \
> preempt_disable(); \
> if (likely(do_raw_##op##_trylock(lock))) \
> break; \
> preempt_enable(); \
> \
> if (!(lock)->break_lock) \
> (lock)->break_lock = 1; \
> while ((lock)->break_lock) \
> arch_##op##_relax(&lock->raw_lock); \
> } \
> (lock)->break_lock = 0; \
> } \
>
> All it takes to create an endless loop is two CPUs, the first acquired the
> lock and the second tries to get the lock. After the unsuccessful trylock
> of the second CPU, the first CPU releases the lock and never tries to take
> it again. The second CPU will be stuck in an endless loop.
Yes, it basically relies on the lock holder never winning that race.
However, Peter's use-case just needs the lock-holder to be able to detect
contention (which is always best-effort anyway), so I think we can make that
"work" by removing the while loop above (see my subsequent diff sent to
Sebastian).
It's still questionable, because on a machine with store-buffers you really
want to order writes to break_lock against something else, but it might
happen to fall out depending on the details of the trylock() implementation.
> I guess my best course of action is to remove GENERIC_LOCKBREAK from
> arch/s390/Kconfig to avoid this construct altogether. Let us see what
> breaks if I do that ..
We could just consider ripping out GENERIC_LOCKBREAK entirely, but I was
hoping we could get a simpler fix in for now.
Will
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [bisected] system hang after boot
2017-11-27 12:54 ` Will Deacon
@ 2017-11-27 13:00 ` Martin Schwidefsky
2017-11-27 13:10 ` Will Deacon
2017-11-27 13:12 ` Peter Zijlstra
0 siblings, 2 replies; 14+ messages in thread
From: Martin Schwidefsky @ 2017-11-27 13:00 UTC (permalink / raw)
To: Will Deacon
Cc: Peter Zijlstra, Sebastian Ott, Ingo Molnar, Heiko Carstens,
linux-kernel
On Mon, 27 Nov 2017 12:54:56 +0000
Will Deacon <will.deacon@arm.com> wrote:
> Hi Martin,
>
> On Mon, Nov 27, 2017 at 01:49:18PM +0100, Martin Schwidefsky wrote:
> > On Mon, 27 Nov 2017 11:49:48 +0000
> > Will Deacon <will.deacon@arm.com> wrote:
> > > On Wed, Nov 22, 2017 at 09:22:17PM +0100, Peter Zijlstra wrote:
> > > > On Wed, Nov 22, 2017 at 06:26:59PM +0000, Will Deacon wrote:
> > > >
> > > > > Now, I can't see what the break_lock is doing here other than causing
> > > > > problems. Is there a good reason for it, or can you just try removing it
> > > > > altogether? Patch below.
> > > >
> > > > The main use is spin_is_contended(), which in turn ends up used in
> > > > __cond_resched_lock() through spin_needbreak().
> > > >
> > > > This allows better lock wait times for PREEMPT kernels on platforms
> > > > where the lock implementation itself cannot provide 'contended' state.
> > > >
> > > > In that capacity the write-write race shouldn't be a problem though.
> > >
> > > I'm not sure why it isn't a problem: given that the break_lock variable
> > > can read as 1 for a lock that is no longer contended and 0 for a lock that
> > > is currently contended, then the __cond_resched_lock is likely to see a
> > > value of 0 (i.e. spin_needbreak always return false) more often than no
> > > since it's checked by the lock holder.
> >
> > Grepping for 'break_lock' the two locking blueprints are the only places
> > where the field is written to. Unless I am blind, the associated unlock
> > functions do *not* reset 'break_lock'.
> >
> > Without the raw_##op##_can_lock(lock) check the first of the blueprints
> > now looks like this:
> >
> > void __lockfunc __raw_##op##_lock(locktype##_t *lock) \
> > { \
> > for (;;) { \
> > preempt_disable(); \
> > if (likely(do_raw_##op##_trylock(lock))) \
> > break; \
> > preempt_enable(); \
> > \
> > if (!(lock)->break_lock) \
> > (lock)->break_lock = 1; \
> > while ((lock)->break_lock) \
> > arch_##op##_relax(&lock->raw_lock); \
> > } \
> > (lock)->break_lock = 0; \
> > } \
> >
> > All it takes to create an endless loop is two CPUs, the first acquired the
> > lock and the second tries to get the lock. After the unsuccessful trylock
> > of the second CPU, the first CPU releases the lock and never tries to take
> > it again. The second CPU will be stuck in an endless loop.
>
> Yes, it basically relies on the lock holder never winning that race.
> However, Peter's use-case just needs the lock-holder to be able to detect
> contention (which is always best-effort anyway), so I think we can make that
> "work" by removing the while loop above (see my subsequent diff sent to
> Sebastian).
Well, what race? The lock hold just has to hold the lock while another CPU
tries to get it. There is no particular bad timing involved, just a little
bit of contention is enough.
And yes, I think removing the while loop on break_lock will work.
> It's still questionable, because on a machine with store-buffers you really
> want to order writes to break_lock against something else, but it might
> happen to fall out depending on the details of the trylock() implementation.
Even more, if the compiler "proves" that nobody writes to break_lock it can
convert that to "while (1)" loop.
> > I guess my best course of action is to remove GENERIC_LOCKBREAK from
> > arch/s390/Kconfig to avoid this construct altogether. Let us see what
> > breaks if I do that ..
>
> We could just consider ripping out GENERIC_LOCKBREAK entirely, but I was
> hoping we could get a simpler fix in for now.
I would opt for removing it entirely.
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [bisected] system hang after boot
2017-11-27 12:45 ` Will Deacon
@ 2017-11-27 13:05 ` Sebastian Ott
0 siblings, 0 replies; 14+ messages in thread
From: Sebastian Ott @ 2017-11-27 13:05 UTC (permalink / raw)
To: Will Deacon
Cc: Peter Zijlstra, Ingo Molnar, Martin Schwidefsky, Heiko Carstens,
linux-kernel
On Mon, 27 Nov 2017, Will Deacon wrote:
> Sebastian: could you try the diff below, please? If that fixes s390, then
> we can debate the merits of GENERIC_LOCKBREAK independently of fixing this
> issue.
>
> Thanks,
>
> Will
>
> --->8
>
> diff --git a/kernel/locking/spinlock.c b/kernel/locking/spinlock.c
> index 1fd1a7543cdd..0ebb253e2199 100644
> --- a/kernel/locking/spinlock.c
> +++ b/kernel/locking/spinlock.c
> @@ -68,8 +68,8 @@ void __lockfunc __raw_##op##_lock(locktype##_t *lock) \
> \
> if (!(lock)->break_lock) \
> (lock)->break_lock = 1; \
> - while ((lock)->break_lock) \
> - arch_##op##_relax(&lock->raw_lock); \
> + \
> + arch_##op##_relax(&lock->raw_lock); \
> } \
> (lock)->break_lock = 0; \
> } \
> @@ -88,8 +88,8 @@ unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock) \
> \
> if (!(lock)->break_lock) \
> (lock)->break_lock = 1; \
> - while ((lock)->break_lock) \
> - arch_##op##_relax(&lock->raw_lock); \
> + \
> + arch_##op##_relax(&lock->raw_lock); \
> } \
> (lock)->break_lock = 0; \
> return flags; \
I tested that on top of 4.15.0-rc1 and it worked!
Sebastian
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [bisected] system hang after boot
2017-11-27 13:00 ` Martin Schwidefsky
@ 2017-11-27 13:10 ` Will Deacon
2017-11-27 13:13 ` Peter Zijlstra
2017-11-27 13:12 ` Peter Zijlstra
1 sibling, 1 reply; 14+ messages in thread
From: Will Deacon @ 2017-11-27 13:10 UTC (permalink / raw)
To: Martin Schwidefsky
Cc: Peter Zijlstra, Sebastian Ott, Ingo Molnar, Heiko Carstens,
linux-kernel
On Mon, Nov 27, 2017 at 02:00:28PM +0100, Martin Schwidefsky wrote:
> On Mon, 27 Nov 2017 12:54:56 +0000
> Will Deacon <will.deacon@arm.com> wrote:
> > On Mon, Nov 27, 2017 at 01:49:18PM +0100, Martin Schwidefsky wrote:
> > > On Mon, 27 Nov 2017 11:49:48 +0000
> > > Will Deacon <will.deacon@arm.com> wrote:
> > > > On Wed, Nov 22, 2017 at 09:22:17PM +0100, Peter Zijlstra wrote:
> > > > > On Wed, Nov 22, 2017 at 06:26:59PM +0000, Will Deacon wrote:
> > > > >
> > > > > > Now, I can't see what the break_lock is doing here other than causing
> > > > > > problems. Is there a good reason for it, or can you just try removing it
> > > > > > altogether? Patch below.
> > > > >
> > > > > The main use is spin_is_contended(), which in turn ends up used in
> > > > > __cond_resched_lock() through spin_needbreak().
> > > > >
> > > > > This allows better lock wait times for PREEMPT kernels on platforms
> > > > > where the lock implementation itself cannot provide 'contended' state.
> > > > >
> > > > > In that capacity the write-write race shouldn't be a problem though.
> > > >
> > > > I'm not sure why it isn't a problem: given that the break_lock variable
> > > > can read as 1 for a lock that is no longer contended and 0 for a lock that
> > > > is currently contended, then the __cond_resched_lock is likely to see a
> > > > value of 0 (i.e. spin_needbreak always return false) more often than no
> > > > since it's checked by the lock holder.
> > >
> > > Grepping for 'break_lock' the two locking blueprints are the only places
> > > where the field is written to. Unless I am blind, the associated unlock
> > > functions do *not* reset 'break_lock'.
> > >
> > > Without the raw_##op##_can_lock(lock) check the first of the blueprints
> > > now looks like this:
> > >
> > > void __lockfunc __raw_##op##_lock(locktype##_t *lock) \
> > > { \
> > > for (;;) { \
> > > preempt_disable(); \
> > > if (likely(do_raw_##op##_trylock(lock))) \
> > > break; \
> > > preempt_enable(); \
> > > \
> > > if (!(lock)->break_lock) \
> > > (lock)->break_lock = 1; \
> > > while ((lock)->break_lock) \
> > > arch_##op##_relax(&lock->raw_lock); \
> > > } \
> > > (lock)->break_lock = 0; \
> > > } \
> > >
> > > All it takes to create an endless loop is two CPUs, the first acquired the
> > > lock and the second tries to get the lock. After the unsuccessful trylock
> > > of the second CPU, the first CPU releases the lock and never tries to take
> > > it again. The second CPU will be stuck in an endless loop.
> >
> > Yes, it basically relies on the lock holder never winning that race.
> > However, Peter's use-case just needs the lock-holder to be able to detect
> > contention (which is always best-effort anyway), so I think we can make that
> > "work" by removing the while loop above (see my subsequent diff sent to
> > Sebastian).
>
> Well, what race? The lock hold just has to hold the lock while another CPU
> tries to get it. There is no particular bad timing involved, just a little
> bit of contention is enough.
Yes, you're right. I keep forgetting that break_lock isn't cleared on
unlock.
> And yes, I think removing the while loop on break_lock will work.
>
> > It's still questionable, because on a machine with store-buffers you really
> > want to order writes to break_lock against something else, but it might
> > happen to fall out depending on the details of the trylock() implementation.
>
> Even more, if the compiler "proves" that nobody writes to break_lock it can
> convert that to "while (1)" loop.
break_lock should be annotated (at least) with READ_ONCE/WRITE_ONCE, which
should prevent that from happening.
> > > I guess my best course of action is to remove GENERIC_LOCKBREAK from
> > > arch/s390/Kconfig to avoid this construct altogether. Let us see what
> > > breaks if I do that ..
> >
> > We could just consider ripping out GENERIC_LOCKBREAK entirely, but I was
> > hoping we could get a simpler fix in for now.
>
> I would opt for removing it entirely.
I'll cook a patch series, with the first patch just removing the while loop
and subsequent patches removing the stuff altogether.
Will
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [bisected] system hang after boot
2017-11-27 13:00 ` Martin Schwidefsky
2017-11-27 13:10 ` Will Deacon
@ 2017-11-27 13:12 ` Peter Zijlstra
1 sibling, 0 replies; 14+ messages in thread
From: Peter Zijlstra @ 2017-11-27 13:12 UTC (permalink / raw)
To: Martin Schwidefsky
Cc: Will Deacon, Sebastian Ott, Ingo Molnar, Heiko Carstens,
linux-kernel
On Mon, Nov 27, 2017 at 02:00:28PM +0100, Martin Schwidefsky wrote:
> I would opt for removing it entirely.
Like said; I'm not opposed to that. I was just explaining where it came
from (before my time might I add) and how its supposed to 'work' :-)
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [bisected] system hang after boot
2017-11-27 13:10 ` Will Deacon
@ 2017-11-27 13:13 ` Peter Zijlstra
0 siblings, 0 replies; 14+ messages in thread
From: Peter Zijlstra @ 2017-11-27 13:13 UTC (permalink / raw)
To: Will Deacon
Cc: Martin Schwidefsky, Sebastian Ott, Ingo Molnar, Heiko Carstens,
linux-kernel
On Mon, Nov 27, 2017 at 01:10:31PM +0000, Will Deacon wrote:
> break_lock should be annotated (at least) with READ_ONCE/WRITE_ONCE, which
> should prevent that from happening.
This code long predates all that new fangled stuff ;-)
^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2017-11-27 13:13 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2017-11-22 17:46 [bisected] system hang after boot Sebastian Ott
2017-11-22 18:26 ` Will Deacon
2017-11-22 18:54 ` Sebastian Ott
2017-11-22 19:10 ` Will Deacon
2017-11-22 20:22 ` Peter Zijlstra
2017-11-27 11:49 ` Will Deacon
2017-11-27 12:45 ` Will Deacon
2017-11-27 13:05 ` Sebastian Ott
2017-11-27 12:49 ` Martin Schwidefsky
2017-11-27 12:54 ` Will Deacon
2017-11-27 13:00 ` Martin Schwidefsky
2017-11-27 13:10 ` Will Deacon
2017-11-27 13:13 ` Peter Zijlstra
2017-11-27 13:12 ` Peter Zijlstra
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox