* Re: [PATCH V2] lglock: add read-preference local-global rwlock
From: Oleg Nesterov @ 2013-03-03 17:40 UTC (permalink / raw)
To: Lai Jiangshan
Cc: Lai Jiangshan, linux-doc, peterz, fweisbec, Michel Lespinasse,
mingo, linux-arch, linux, xiaoguangrong, wangyun, paulmck, nikunj,
linux-pm, rusty, rostedt, rjw, namhyung, tglx, linux-arm-kernel,
netdev, linux-kernel, vincent.guittot, sbw, Srivatsa S. Bhat, tj,
akpm, linuxppc-dev
In-Reply-To: <20130302172003.GC29769@redhat.com>
On 03/02, Oleg Nesterov wrote:
>
> On 03/02, Lai Jiangshan wrote:
> >
> > +void lg_rwlock_local_read_unlock(struct lgrwlock *lgrw)
> > +{
> > + switch (__this_cpu_read(*lgrw->reader_refcnt)) {
> > + case 1:
> > + __this_cpu_write(*lgrw->reader_refcnt, 0);
> > + lg_local_unlock(&lgrw->lglock);
> > + return;
> > + case FALLBACK_BASE:
> > + __this_cpu_write(*lgrw->reader_refcnt, 0);
> > + read_unlock(&lgrw->fallback_rwlock);
> > + rwlock_release(&lg->lock_dep_map, 1, _RET_IP_);
>
> I guess "case 1:" should do rwlock_release() too.
>
> Otherwise, at first glance looks correct...
>
> However, I still think that FALLBACK_BASE only adds the unnecessary
> complications. But even if I am right this is subjective of course, please
> feel free to ignore.
Yes, but...
> And btw, I am not sure about lg->lock_dep_map, perhaps we should use
> fallback_rwlock->dep_map ?
>
> We need rwlock_acquire_read() even in the fast-path, and this acquire_read
> should be paired with rwlock_acquire() in _write_lock(), but it does
> spin_acquire(lg->lock_dep_map). Yes, currently this is the same (afaics)
> but perhaps fallback_rwlock->dep_map would be more clean.
Please ignore this part.
I missed that lg_rwlock_global_write_lock() relies on lg_global_lock(),
and I just noticed that it does rwlock_acquire(lg->lock_dep_map).
Hmm. But then I do not understand the lglock annotations. Obviously,
rwlock_acquire_read() in lg_local_lock() can't even detect the simplest
deadlock, say, lg_local_lock(LOCK) + lg_local_lock(LOCK). Not to mention
spin_lock(X) + lg_local_lock(Y) vs lg_local_lock(Y) + spin_lock(X).
OK, I understand that it is not easy to make these annotations correct...
Oleg.
^ permalink raw reply
* Re: Linux kernel 3.x problems on PowerMac G5
From: Phileas Fogg @ 2013-03-03 12:48 UTC (permalink / raw)
To: Benjamin Herrenschmidt; +Cc: linuxppc-dev
In-Reply-To: <1362288548.2969.13.camel@pasglop>
Benjamin Herrenschmidt wrote:
> On Sat, 2013-03-02 at 15:40 +0100, Phileas Fogg wrote:
>> recently i got a PowerMac G5 and installed Debian Linux 2.6.32 on it.
>> Everything works so far and Debian boots properly.
>>
>> Today i tried to boot Linux 3 on the machine and it doesn't boot.
>> The Linux 3 kernel was cross-compiled by me.
>>
>> On Linux 3.8.1 it hangs after this line:
>> ---
>> windfarm: Drive bay control loop started.
>>
>> And then i'm getting RCU stall call traces.
>>
>> On Linux 3.2 it hangs too but not at the same place.
>> It hangs after some SCSI message.
>>
>> Have anyone tested Linux 3 kernels on PowerMac G5 recently ?
>
> Hrm, this is odd. I do run pretty much every release on my G5's without
> problems... Can you send me your .config and then try with a
> g5_defconfig just to see if it makes a difference ?
>
> There *might* have been a problem on those older machines vs. the 64T
> address space patches, so maybe try back 3.6 and 3.7 and let me know,
> I'm still trying to get the right fix in (I know it breaks PS/3 under
> some circumstances).
>
> Cheers,
> Ben.
>
>
Reverted 64TB commit on Linux 3.8.1 and it didn't help, it still hangs.
Here is the RCU stall call trace:
BUG - soft lockup - CPU#1 stuck for 23s
Call trace:
padzero
load_elf_binary
search_binary_handler
load_script
search_binary_handler
do_execve_common
sys_execve
syscall_exit
Exception at kernel_execve
LR = run_init_process
regards
^ permalink raw reply
* Re: Linux kernel 3.x problems on PowerMac G5
From: Phileas Fogg @ 2013-03-03 12:16 UTC (permalink / raw)
To: Benjamin Herrenschmidt
Cc: Andreas Schwab, Denis Kirjanov, linuxppc-dev, Aaro Koskinen
In-Reply-To: <1362303524.2969.16.camel@pasglop>
[-- Attachment #1: Type: text/plain, Size: 1236 bytes --]
Benjamin Herrenschmidt wrote:
> On Sun, 2013-03-03 at 11:23 +0300, Denis Kirjanov wrote:
>> I'm running 3.7.6 without any problems on my quad core machine. You
>> have to try to compile with g5_defconfig...
>
> Sure but I still want to know what in his config is breaking it, chances
> are that's something that we should fix :-)
>
> Cheers,
> Ben.
>
>
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@lists.ozlabs.org
> https://lists.ozlabs.org/listinfo/linuxppc-dev
Hi,
i'm testing currently with slightly modified g5_defconfig. I enabled
the Ralink driver for my USB WLAN NIC and some other stuff, nothing
fancy. Anyways, i'm sending you config for 3.0.67. Linux 3.0.67 hangs on
my machine too.
I cloned your GIT powerpc repository and at the moment bisecting and
trying to find the commit which causes trouble on my machine.
I have already found out that
the commit 27d934b28752b860cba6c0d77ea4598861d80998 is OK
but
the commit 0bd41dfc9fbbcf174d5336c1c9fc5ba917519761 is NOT.
The problem appeared between Linux 2.6.39 and Linux-3.0-rc1.
Just my typical luck with PowerPC :) First PS3 and now G5.
I will report back as soon as i find the commit which causes the hangs.
regards
[-- Attachment #2: config-3.0.67 --]
[-- Type: text/plain, Size: 56431 bytes --]
#
# Automatically generated make config: don't edit
# Linux/powerpc 3.0.67 Kernel Configuration
#
CONFIG_PPC64=y
#
# Processor support
#
CONFIG_PPC_BOOK3S_64=y
# CONFIG_PPC_BOOK3E_64 is not set
CONFIG_PPC_BOOK3S=y
CONFIG_POWER4_ONLY=y
CONFIG_POWER4=y
# CONFIG_TUNE_CELL is not set
CONFIG_PPC_FPU=y
CONFIG_ALTIVEC=y
# CONFIG_VSX is not set
# CONFIG_PPC_ICSWX is not set
CONFIG_PPC_STD_MMU=y
CONFIG_PPC_STD_MMU_64=y
CONFIG_PPC_MM_SLICES=y
CONFIG_VIRT_CPU_ACCOUNTING=y
CONFIG_PPC_HAVE_PMU_SUPPORT=y
CONFIG_PPC_PERF_CTRS=y
CONFIG_SMP=y
CONFIG_NR_CPUS=4
CONFIG_64BIT=y
CONFIG_WORD_SIZE=64
CONFIG_ARCH_PHYS_ADDR_T_64BIT=y
CONFIG_ARCH_DMA_ADDR_T_64BIT=y
CONFIG_MMU=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
CONFIG_NR_IRQS=512
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_ARCH_HAS_ILOG2_U32=y
CONFIG_ARCH_HAS_ILOG2_U64=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_ARCH_NO_VIRT_TO_BUS=y
CONFIG_PPC=y
CONFIG_EARLY_PRINTK=y
CONFIG_COMPAT=y
CONFIG_SYSVIPC_COMPAT=y
CONFIG_SCHED_OMIT_FRAME_POINTER=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_PPC_OF=y
# CONFIG_PPC_UDBG_16550 is not set
CONFIG_GENERIC_TBSYNC=y
CONFIG_AUDIT_ARCH=y
CONFIG_GENERIC_BUG=y
# CONFIG_EPAPR_BOOT is not set
# CONFIG_DEFAULT_UIMAGE is not set
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
# CONFIG_PPC_DCR_NATIVE is not set
# CONFIG_PPC_DCR_MMIO is not set
# CONFIG_PPC_OF_PLATFORM_PCI is not set
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
CONFIG_HAVE_IRQ_WORK=y
CONFIG_IRQ_WORK=y
#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_CROSS_COMPILE=""
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_DEFAULT_HOSTNAME="(none)"
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_FHANDLE is not set
# CONFIG_TASKSTATS is not set
# CONFIG_AUDIT is not set
CONFIG_HAVE_GENERIC_HARDIRQS=y
#
# IRQ subsystem
#
CONFIG_GENERIC_HARDIRQS=y
CONFIG_HAVE_SPARSE_IRQ=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_IRQ_SHOW_LEVEL=y
# CONFIG_SPARSE_IRQ is not set
#
# RCU Subsystem
#
CONFIG_TREE_RCU=y
# CONFIG_PREEMPT_RCU is not set
# CONFIG_RCU_TRACE is not set
CONFIG_RCU_FANOUT=64
# CONFIG_RCU_FANOUT_EXACT is not set
# CONFIG_RCU_FAST_NO_HZ is not set
# CONFIG_TREE_RCU_TRACE is not set
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=17
# CONFIG_CGROUPS is not set
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 is not set
# CONFIG_SYSFS_DEPRECATED is not set
# CONFIG_RELAY is not set
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_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
# CONFIG_EXPERT is not set
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
# CONFIG_EMBEDDED is not set
CONFIG_HAVE_PERF_EVENTS=y
#
# Kernel Performance Events And Counters
#
CONFIG_PERF_EVENTS=y
# CONFIG_PERF_COUNTERS is not set
# CONFIG_DEBUG_PERF_USE_VMALLOC is not set
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_PCI_QUIRKS=y
CONFIG_SLUB_DEBUG=y
# CONFIG_COMPAT_BRK is not set
# CONFIG_SLAB is not set
CONFIG_SLUB=y
CONFIG_PROFILING=y
CONFIG_OPROFILE=y
CONFIG_HAVE_OPROFILE=y
# CONFIG_KPROBES is not set
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_HAVE_SYSCALL_WRAPPERS=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_HAVE_DMA_ATTRS=y
CONFIG_USE_GENERIC_SMP_HELPERS=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_DMA_API_DEBUG=y
CONFIG_HAVE_HW_BREAKPOINT=y
CONFIG_HAVE_RCU_TABLE_FREE=y
#
# GCOV-based kernel profiling
#
# CONFIG_GCOV_KERNEL is not set
# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
# CONFIG_MODULE_FORCE_LOAD is not set
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
CONFIG_MODVERSIONS=y
CONFIG_MODULE_SRCVERSION_ALL=y
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
CONFIG_BLK_DEV_BSG=y
# CONFIG_BLK_DEV_INTEGRITY is not set
CONFIG_BLOCK_COMPAT=y
#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"
# CONFIG_INLINE_SPIN_TRYLOCK is not set
# CONFIG_INLINE_SPIN_TRYLOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK is not set
# CONFIG_INLINE_SPIN_LOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK_IRQ is not set
# CONFIG_INLINE_SPIN_LOCK_IRQSAVE is not set
CONFIG_INLINE_SPIN_UNLOCK=y
# CONFIG_INLINE_SPIN_UNLOCK_BH is not set
CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
# CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_READ_TRYLOCK is not set
# CONFIG_INLINE_READ_LOCK is not set
# CONFIG_INLINE_READ_LOCK_BH is not set
# CONFIG_INLINE_READ_LOCK_IRQ is not set
# CONFIG_INLINE_READ_LOCK_IRQSAVE is not set
CONFIG_INLINE_READ_UNLOCK=y
# CONFIG_INLINE_READ_UNLOCK_BH is not set
CONFIG_INLINE_READ_UNLOCK_IRQ=y
# CONFIG_INLINE_READ_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_WRITE_TRYLOCK is not set
# CONFIG_INLINE_WRITE_LOCK is not set
# CONFIG_INLINE_WRITE_LOCK_BH is not set
# CONFIG_INLINE_WRITE_LOCK_IRQ is not set
# CONFIG_INLINE_WRITE_LOCK_IRQSAVE is not set
CONFIG_INLINE_WRITE_UNLOCK=y
# CONFIG_INLINE_WRITE_UNLOCK_BH is not set
CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
# CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE is not set
# CONFIG_MUTEX_SPIN_ON_OWNER is not set
CONFIG_FREEZER=y
CONFIG_PPC_MSI_BITMAP=y
# CONFIG_PPC_XICS is not set
# CONFIG_PPC_ICP_NATIVE is not set
# CONFIG_PPC_ICP_HV is not set
# CONFIG_PPC_ICS_RTAS is not set
#
# Platform support
#
# CONFIG_PPC_PSERIES is not set
# CONFIG_PPC_ISERIES is not set
CONFIG_PPC_PMAC=y
CONFIG_PPC_PMAC64=y
# CONFIG_PPC_MAPLE is not set
# CONFIG_PPC_PASEMI is not set
# CONFIG_PPC_PS3 is not set
# CONFIG_PPC_CELL is not set
# CONFIG_PPC_CELL_NATIVE is not set
# CONFIG_PPC_IBM_CELL_BLADE is not set
# CONFIG_PPC_CELLEB is not set
# CONFIG_PPC_CELL_QPACE is not set
# CONFIG_PQ2ADS is not set
# CONFIG_PPC_WSP is not set
CONFIG_KVM_GUEST=y
CONFIG_PPC_NATIVE=y
CONFIG_PPC_OF_BOOT_TRAMPOLINE=y
# CONFIG_IPIC is not set
CONFIG_MPIC=y
# CONFIG_MPIC_WEIRD is not set
# CONFIG_PPC_I8259 is not set
CONFIG_U3_DART=y
# CONFIG_PPC_RTAS is not set
# CONFIG_MMIO_NVRAM is not set
CONFIG_MPIC_U3_HT_IRQS=y
# CONFIG_PPC_MPC106 is not set
CONFIG_PPC_970_NAP=y
# CONFIG_PPC_P7_NAP is not set
#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
CONFIG_CPU_FREQ_STAT=y
# CONFIG_CPU_FREQ_STAT_DETAILS is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
# CONFIG_CPU_FREQ_GOV_ONDEMAND is not set
# CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set
#
# CPU Frequency drivers
#
CONFIG_CPU_FREQ_PMAC64=y
# CONFIG_FSL_ULI1575 is not set
# CONFIG_SIMPLE_GPIO is not set
#
# Kernel options
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
CONFIG_SCHED_HRTICK=y
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set
CONFIG_BINFMT_ELF=y
CONFIG_COMPAT_BINFMT_ELF=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
# CONFIG_HAVE_AOUT is not set
# CONFIG_BINFMT_MISC is not set
CONFIG_HUGETLB_PAGE_SIZE_VARIABLE=y
CONFIG_IOMMU_HELPER=y
# CONFIG_SWIOTLB is not set
CONFIG_HOTPLUG_CPU=y
CONFIG_ARCH_CPU_PROBE_RELEASE=y
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_ARCH_HAS_WALK_MEMORY=y
CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
CONFIG_KEXEC=y
# CONFIG_CRASH_DUMP is not set
CONFIG_IRQ_ALL_CPUS=y
# CONFIG_NUMA is not set
CONFIG_MAX_ACTIVE_REGIONS=256
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_POPULATES_NODE_MAP=y
CONFIG_SYS_SUPPORTS_HUGETLBFS=y
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
CONFIG_HAVE_MEMBLOCK=y
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_COMPACTION is not set
# CONFIG_MIGRATION is not set
CONFIG_PHYS_ADDR_T_64BIT=y
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
# CONFIG_KSM is not set
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
# CONFIG_CLEANCACHE is not set
# CONFIG_PPC_HAS_HASH_64K is not set
CONFIG_PPC_4K_PAGES=y
# CONFIG_PPC_64K_PAGES is not set
CONFIG_FORCE_MAX_ZONEORDER=13
# CONFIG_SCHED_SMT is not set
# CONFIG_CMDLINE_BOOL is not set
CONFIG_EXTRA_TARGETS=""
CONFIG_ARCH_WANTS_FREEZER_CONTROL=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
# CONFIG_HIBERNATION is not set
CONFIG_PM_SLEEP=y
CONFIG_PM_SLEEP_SMP=y
# CONFIG_PM_RUNTIME is not set
CONFIG_PM=y
# CONFIG_PM_DEBUG is not set
CONFIG_SECCOMP=y
CONFIG_ISA_DMA_API=y
#
# Bus options
#
CONFIG_ZONE_DMA=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_GENERIC_ISA_DMA=y
# CONFIG_PPC_INDIRECT_PCI is not set
CONFIG_PCI=y
CONFIG_PCI_DOMAINS=y
CONFIG_PCI_SYSCALL=y
# CONFIG_PCIEPORTBUS is not set
CONFIG_ARCH_SUPPORTS_MSI=y
CONFIG_PCI_MSI=y
# CONFIG_PCI_DEBUG is not set
# CONFIG_PCI_STUB is not set
# CONFIG_PCI_IOV is not set
# CONFIG_PCCARD is not set
# CONFIG_HOTPLUG_PCI is not set
# CONFIG_HAS_RAPIDIO is not set
# CONFIG_RAPIDIO is not set
# CONFIG_RELOCATABLE is not set
CONFIG_PAGE_OFFSET=0xc000000000000000
CONFIG_KERNEL_START=0xc000000000000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_NET=y
CONFIG_COMPAT_NETLINK_MESSAGES=y
#
# Networking options
#
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_XFRM=y
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_INET=y
CONFIG_IP_MULTICAST=y
# CONFIG_IP_ADVANCED_ROUTER is not set
# CONFIG_IP_PNP is not set
CONFIG_NET_IPIP=y
# CONFIG_NET_IPGRE_DEMUX is not set
# CONFIG_IP_MROUTE is not set
# CONFIG_ARPD is not set
CONFIG_SYN_COOKIES=y
CONFIG_INET_AH=m
CONFIG_INET_ESP=m
CONFIG_INET_IPCOMP=m
CONFIG_INET_XFRM_TUNNEL=m
CONFIG_INET_TUNNEL=y
CONFIG_INET_XFRM_MODE_TRANSPORT=y
CONFIG_INET_XFRM_MODE_TUNNEL=y
CONFIG_INET_XFRM_MODE_BEET=y
CONFIG_INET_LRO=y
CONFIG_INET_DIAG=y
CONFIG_INET_TCP_DIAG=y
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
# CONFIG_IPV6 is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
CONFIG_NETFILTER_ADVANCED=y
#
# Core Netfilter Configuration
#
CONFIG_NETFILTER_NETLINK=m
CONFIG_NETFILTER_NETLINK_QUEUE=m
CONFIG_NETFILTER_NETLINK_LOG=m
CONFIG_NF_CONNTRACK=m
CONFIG_NF_CONNTRACK_MARK=y
CONFIG_NF_CONNTRACK_EVENTS=y
# CONFIG_NF_CONNTRACK_TIMESTAMP is not set
# CONFIG_NF_CT_PROTO_DCCP is not set
# CONFIG_NF_CT_PROTO_SCTP is not set
# CONFIG_NF_CT_PROTO_UDPLITE is not set
# CONFIG_NF_CONNTRACK_AMANDA is not set
CONFIG_NF_CONNTRACK_FTP=m
# CONFIG_NF_CONNTRACK_H323 is not set
CONFIG_NF_CONNTRACK_IRC=m
# CONFIG_NF_CONNTRACK_NETBIOS_NS is not set
# CONFIG_NF_CONNTRACK_SNMP is not set
# CONFIG_NF_CONNTRACK_PPTP is not set
# CONFIG_NF_CONNTRACK_SANE is not set
# CONFIG_NF_CONNTRACK_SIP is not set
CONFIG_NF_CONNTRACK_TFTP=m
CONFIG_NF_CT_NETLINK=m
# CONFIG_NETFILTER_XTABLES is not set
# CONFIG_IP_SET is not set
# CONFIG_IP_VS is not set
#
# IP: Netfilter Configuration
#
CONFIG_NF_DEFRAG_IPV4=m
CONFIG_NF_CONNTRACK_IPV4=m
CONFIG_NF_CONNTRACK_PROC_COMPAT=y
CONFIG_IP_NF_QUEUE=m
# CONFIG_IP_NF_IPTABLES is not set
# CONFIG_IP_NF_ARPTABLES is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_RDS is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_L2TP is not set
# CONFIG_BRIDGE is not set
# CONFIG_NET_DSA is not set
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
# 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_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_PHONET is not set
# CONFIG_IEEE802154 is not set
# CONFIG_NET_SCHED is not set
# CONFIG_DCB is not set
CONFIG_DNS_RESOLVER=y
# CONFIG_BATMAN_ADV is not set
CONFIG_RPS=y
CONFIG_RFS_ACCEL=y
CONFIG_XPS=y
#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
CONFIG_WIRELESS=y
CONFIG_WEXT_CORE=y
CONFIG_WEXT_PROC=y
CONFIG_CFG80211=m
# CONFIG_NL80211_TESTMODE is not set
# CONFIG_CFG80211_DEVELOPER_WARNINGS is not set
# CONFIG_CFG80211_REG_DEBUG is not set
CONFIG_CFG80211_DEFAULT_PS=y
# CONFIG_CFG80211_DEBUGFS is not set
# CONFIG_CFG80211_INTERNAL_REGDB is not set
CONFIG_CFG80211_WEXT=y
CONFIG_WIRELESS_EXT_SYSFS=y
CONFIG_LIB80211=m
# CONFIG_LIB80211_DEBUG is not set
CONFIG_MAC80211=m
CONFIG_MAC80211_HAS_RC=y
CONFIG_MAC80211_RC_MINSTREL=y
CONFIG_MAC80211_RC_MINSTREL_HT=y
CONFIG_MAC80211_RC_DEFAULT_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT="minstrel_ht"
# CONFIG_MAC80211_MESH is not set
CONFIG_MAC80211_DEBUGFS=y
# CONFIG_MAC80211_DEBUG_MENU is not set
# 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
#
# Device Drivers
#
#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
# CONFIG_DEVTMPFS is not set
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
CONFIG_FIRMWARE_IN_KERNEL=y
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_SYS_HYPERVISOR is not set
# CONFIG_CONNECTOR is not set
# CONFIG_MTD is not set
CONFIG_DTC=y
CONFIG_OF=y
#
# Device Tree and Open Firmware support
#
CONFIG_PROC_DEVICETREE=y
CONFIG_OF_FLATTREE=y
CONFIG_OF_EARLY_FLATTREE=y
CONFIG_OF_DYNAMIC=y
CONFIG_OF_ADDRESS=y
CONFIG_OF_IRQ=y
CONFIG_OF_DEVICE=y
CONFIG_OF_I2C=y
CONFIG_OF_NET=y
CONFIG_OF_MDIO=y
CONFIG_OF_PCI=y
# CONFIG_PARPORT is not set
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_FD is not set
# CONFIG_BLK_CPQ_CISS_DA 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=y
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
#
# DRBD disabled because PROC_FS, INET or CONNECTOR not selected
#
CONFIG_BLK_DEV_NBD=m
# CONFIG_BLK_DEV_SX8 is not set
# CONFIG_BLK_DEV_UB is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=65536
# CONFIG_BLK_DEV_XIP is not set
CONFIG_CDROM_PKTCDVD=m
CONFIG_CDROM_PKTCDVD_BUFFERS=8
# CONFIG_CDROM_PKTCDVD_WCACHE is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_BLK_DEV_HD is not set
# CONFIG_BLK_DEV_RBD is not set
# CONFIG_SENSORS_LIS3LV02D is not set
# CONFIG_MISC_DEVICES is not set
CONFIG_HAVE_IDE=y
CONFIG_IDE=y
#
# Please see Documentation/ide/ide.txt for help/info on IDE drives
#
CONFIG_IDE_XFER_MODE=y
CONFIG_IDE_TIMINGS=y
CONFIG_IDE_ATAPI=y
# CONFIG_BLK_DEV_IDE_SATA is not set
CONFIG_IDE_GD=y
CONFIG_IDE_GD_ATA=y
# CONFIG_IDE_GD_ATAPI is not set
CONFIG_BLK_DEV_IDECD=y
CONFIG_BLK_DEV_IDECD_VERBOSE_ERRORS=y
# CONFIG_BLK_DEV_IDETAPE is not set
# CONFIG_IDE_TASK_IOCTL is not set
CONFIG_IDE_PROC_FS=y
#
# IDE chipset support/bugfixes
#
# CONFIG_BLK_DEV_PLATFORM is not set
CONFIG_BLK_DEV_IDEDMA_SFF=y
#
# PCI IDE chipsets support
#
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_IDEPCI_PCIBUS_ORDER=y
# CONFIG_BLK_DEV_GENERIC is not set
# CONFIG_BLK_DEV_OPTI621 is not set
CONFIG_BLK_DEV_IDEDMA_PCI=y
# CONFIG_BLK_DEV_AEC62XX is not set
# CONFIG_BLK_DEV_ALI15X3 is not set
# CONFIG_BLK_DEV_AMD74XX is not set
# CONFIG_BLK_DEV_CMD64X is not set
# CONFIG_BLK_DEV_TRIFLEX is not set
# CONFIG_BLK_DEV_CS5520 is not set
# CONFIG_BLK_DEV_CS5530 is not set
# CONFIG_BLK_DEV_HPT366 is not set
# CONFIG_BLK_DEV_JMICRON is not set
# CONFIG_BLK_DEV_SC1200 is not set
# CONFIG_BLK_DEV_PIIX is not set
# CONFIG_BLK_DEV_IT8172 is not set
# CONFIG_BLK_DEV_IT8213 is not set
# CONFIG_BLK_DEV_IT821X is not set
# CONFIG_BLK_DEV_NS87415 is not set
# CONFIG_BLK_DEV_PDC202XX_OLD is not set
# CONFIG_BLK_DEV_PDC202XX_NEW is not set
# CONFIG_BLK_DEV_SVWKS is not set
# CONFIG_BLK_DEV_SIIMAGE is not set
# CONFIG_BLK_DEV_SL82C105 is not set
# CONFIG_BLK_DEV_SLC90E66 is not set
# CONFIG_BLK_DEV_TRM290 is not set
# CONFIG_BLK_DEV_VIA82CXXX is not set
# CONFIG_BLK_DEV_TC86C001 is not set
CONFIG_BLK_DEV_IDE_PMAC=y
CONFIG_BLK_DEV_IDE_PMAC_ATA100FIRST=y
CONFIG_BLK_DEV_IDEDMA=y
#
# SCSI device support
#
CONFIG_SCSI_MOD=y
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
# CONFIG_SCSI_TGT is not set
# CONFIG_SCSI_NETLINK is not set
CONFIG_SCSI_PROC_FS=y
#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
CONFIG_CHR_DEV_ST=y
# CONFIG_CHR_DEV_OSST is not set
CONFIG_BLK_DEV_SR=y
CONFIG_BLK_DEV_SR_VENDOR=y
CONFIG_CHR_DEV_SG=y
# CONFIG_CHR_DEV_SCH is not set
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
# CONFIG_SCSI_LOGGING is not set
# CONFIG_SCSI_SCAN_ASYNC is not set
CONFIG_SCSI_WAIT_SCAN=m
#
# SCSI Transports
#
CONFIG_SCSI_SPI_ATTRS=y
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set
# CONFIG_SCSI_SAS_ATTRS is not set
# CONFIG_SCSI_SAS_LIBSAS is not set
# CONFIG_SCSI_SRP_ATTRS is not set
CONFIG_SCSI_LOWLEVEL=y
# CONFIG_ISCSI_TCP is not set
# 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_SCSI_BNX2X_FCOE 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_AIC7XXX_OLD is not set
# CONFIG_SCSI_AIC79XX is not set
# CONFIG_SCSI_AIC94XX is not set
# CONFIG_SCSI_MVSAS is not set
# CONFIG_SCSI_ARCMSR is not set
# CONFIG_MEGARAID_NEWGEN is not set
# CONFIG_MEGARAID_LEGACY is not set
# CONFIG_MEGARAID_SAS is not set
# CONFIG_SCSI_MPT2SAS is not set
# CONFIG_SCSI_HPTIOP is not set
# CONFIG_LIBFC is not set
# CONFIG_LIBFCOE is not set
# CONFIG_FCOE is not set
# CONFIG_SCSI_DMX3191D is not set
# CONFIG_SCSI_EATA is not set
# CONFIG_SCSI_FUTURE_DOMAIN is not set
# CONFIG_SCSI_GDTH 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_IPR 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_DC390T is not set
# CONFIG_SCSI_DEBUG is not set
# CONFIG_SCSI_PMCRAID is not set
# CONFIG_SCSI_PM8001 is not set
# CONFIG_SCSI_SRP is not set
# CONFIG_SCSI_BFA_FC is not set
# CONFIG_SCSI_DH is not set
# CONFIG_SCSI_OSD_INITIATOR is not set
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_ATA_VERBOSE_ERROR=y
CONFIG_SATA_PMP=y
#
# Controllers with non-SFF native interface
#
# CONFIG_SATA_AHCI is not set
# CONFIG_SATA_AHCI_PLATFORM is not set
# CONFIG_SATA_INIC162X is not set
# CONFIG_SATA_ACARD_AHCI is not set
# CONFIG_SATA_SIL24 is not set
CONFIG_ATA_SFF=y
#
# SFF controllers with custom DMA interface
#
# CONFIG_PDC_ADMA is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_SX4 is not set
CONFIG_ATA_BMDMA=y
#
# SATA SFF controllers with BMDMA
#
# CONFIG_ATA_PIIX is not set
# CONFIG_SATA_MV is not set
# CONFIG_SATA_NV is not set
# CONFIG_SATA_PROMISE is not set
# CONFIG_SATA_SIL is not set
# CONFIG_SATA_SIS is not set
CONFIG_SATA_SVW=y
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
# CONFIG_SATA_VITESSE is not set
#
# PATA SFF controllers with BMDMA
#
# CONFIG_PATA_ALI is not set
# CONFIG_PATA_AMD is not set
# CONFIG_PATA_ARASAN_CF is not set
# CONFIG_PATA_ARTOP is not set
# CONFIG_PATA_ATIIXP is not set
# CONFIG_PATA_ATP867X is not set
# CONFIG_PATA_CMD64X is not set
# CONFIG_PATA_CS5520 is not set
# CONFIG_PATA_CS5530 is not set
# CONFIG_PATA_CS5536 is not set
# CONFIG_PATA_CYPRESS is not set
# CONFIG_PATA_EFAR is not set
# CONFIG_PATA_HPT366 is not set
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
# CONFIG_PATA_HPT3X3 is not set
# CONFIG_PATA_IT8213 is not set
# CONFIG_PATA_IT821X is not set
# CONFIG_PATA_JMICRON is not set
# CONFIG_PATA_MACIO is not set
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NINJA32 is not set
# CONFIG_PATA_NS87415 is not set
# CONFIG_PATA_OLDPIIX is not set
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC2027X is not set
# CONFIG_PATA_PDC_OLD is not set
# CONFIG_PATA_RADISYS is not set
# CONFIG_PATA_RDC is not set
# CONFIG_PATA_SC1200 is not set
# CONFIG_PATA_SCH is not set
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_SIL680 is not set
# CONFIG_PATA_SIS is not set
# CONFIG_PATA_TOSHIBA is not set
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_VIA is not set
# CONFIG_PATA_WINBOND is not set
#
# PIO-only SFF controllers
#
# CONFIG_PATA_CMD640_PCI is not set
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_PLATFORM is not set
# CONFIG_PATA_RZ1000 is not set
#
# Generic fallback / legacy drivers
#
# CONFIG_ATA_GENERIC is not set
# CONFIG_PATA_LEGACY is not set
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_AUTODETECT=y
CONFIG_MD_LINEAR=y
CONFIG_MD_RAID0=y
CONFIG_MD_RAID1=y
CONFIG_MD_RAID10=m
# CONFIG_MD_RAID456 is not set
CONFIG_MD_MULTIPATH=m
CONFIG_MD_FAULTY=m
CONFIG_BLK_DEV_DM=y
# CONFIG_DM_DEBUG is not set
CONFIG_DM_CRYPT=m
CONFIG_DM_SNAPSHOT=m
CONFIG_DM_MIRROR=m
# CONFIG_DM_RAID is not set
# CONFIG_DM_LOG_USERSPACE is not set
CONFIG_DM_ZERO=m
# CONFIG_DM_MULTIPATH is not set
# CONFIG_DM_DELAY is not set
# CONFIG_DM_UEVENT is not set
# CONFIG_DM_FLAKEY 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_I2O is not set
CONFIG_MACINTOSH_DRIVERS=y
CONFIG_ADB_PMU=y
# CONFIG_ADB_PMU_LED is not set
CONFIG_PMAC_SMU=y
CONFIG_MAC_EMUMOUSEBTN=y
CONFIG_THERM_PM72=y
CONFIG_WINDFARM=y
CONFIG_WINDFARM_PM81=y
CONFIG_WINDFARM_PM91=y
CONFIG_WINDFARM_PM112=y
CONFIG_WINDFARM_PM121=y
# CONFIG_PMAC_RACKMETER is not set
CONFIG_NETDEVICES=y
CONFIG_DUMMY=m
CONFIG_BONDING=m
# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
CONFIG_TUN=m
# CONFIG_VETH is not set
# CONFIG_ARCNET is not set
CONFIG_MII=y
CONFIG_PHYLIB=y
#
# MII PHY device drivers
#
# CONFIG_MARVELL_PHY is not set
# CONFIG_DAVICOM_PHY is not set
# CONFIG_QSEMI_PHY is not set
# CONFIG_LXT_PHY is not set
# CONFIG_CICADA_PHY is not set
# CONFIG_VITESSE_PHY is not set
# CONFIG_SMSC_PHY is not set
# CONFIG_BROADCOM_PHY is not set
# CONFIG_ICPLUS_PHY is not set
# CONFIG_REALTEK_PHY is not set
# CONFIG_NATIONAL_PHY is not set
# CONFIG_STE10XP is not set
# CONFIG_LSI_ET1011C_PHY is not set
# CONFIG_MICREL_PHY is not set
# CONFIG_FIXED_PHY is not set
# CONFIG_MDIO_BITBANG is not set
CONFIG_NET_ETHERNET=y
# CONFIG_HAPPYMEAL is not set
CONFIG_SUNGEM=y
# CONFIG_CASSINI is not set
# CONFIG_NET_VENDOR_3COM is not set
# CONFIG_ETHOC is not set
# CONFIG_DNET is not set
# CONFIG_NET_TULIP is not set
# CONFIG_HP100 is not set
# CONFIG_IBM_NEW_EMAC_ZMII is not set
# CONFIG_IBM_NEW_EMAC_RGMII is not set
# CONFIG_IBM_NEW_EMAC_TAH is not set
# CONFIG_IBM_NEW_EMAC_EMAC4 is not set
# CONFIG_IBM_NEW_EMAC_NO_FLOW_CTRL is not set
# CONFIG_IBM_NEW_EMAC_MAL_CLR_ICINTSTAT is not set
# CONFIG_IBM_NEW_EMAC_MAL_COMMON_ERR is not set
# CONFIG_NET_PCI is not set
# CONFIG_B44 is not set
# CONFIG_KS8851_MLL is not set
# CONFIG_ATL2 is not set
CONFIG_NETDEV_1000=y
CONFIG_ACENIC=m
CONFIG_ACENIC_OMIT_TIGON_I=y
# CONFIG_DL2K is not set
CONFIG_E1000=y
# CONFIG_E1000E is not set
# CONFIG_IP1000 is not set
# CONFIG_IGB is not set
# CONFIG_IGBVF is not set
# CONFIG_NS83820 is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_R8169 is not set
# CONFIG_SIS190 is not set
# CONFIG_SKGE is not set
# CONFIG_SKY2 is not set
# CONFIG_VIA_VELOCITY is not set
CONFIG_TIGON3=y
# CONFIG_BNX2 is not set
# CONFIG_CNIC is not set
# CONFIG_XILINX_LL_TEMAC is not set
# CONFIG_QLA3XXX is not set
# CONFIG_ATL1 is not set
# CONFIG_ATL1E is not set
# CONFIG_ATL1C is not set
# CONFIG_JME is not set
# CONFIG_STMMAC_ETH is not set
# CONFIG_PCH_GBE is not set
CONFIG_NETDEV_10000=y
# CONFIG_CHELSIO_T1 is not set
# CONFIG_CHELSIO_T3 is not set
# CONFIG_CHELSIO_T4 is not set
# CONFIG_CHELSIO_T4VF is not set
# CONFIG_ENIC is not set
# CONFIG_IXGBE is not set
# CONFIG_IXGBEVF is not set
# CONFIG_IXGB is not set
# CONFIG_S2IO is not set
# CONFIG_VXGE is not set
# CONFIG_MYRI10GE is not set
# CONFIG_NETXEN_NIC is not set
# CONFIG_NIU is not set
# CONFIG_MLX4_EN is not set
# CONFIG_MLX4_CORE is not set
# CONFIG_TEHUTI is not set
# CONFIG_BNX2X is not set
# CONFIG_QLCNIC is not set
# CONFIG_QLGE is not set
# CONFIG_BNA is not set
# CONFIG_SFC is not set
# CONFIG_BE2NET is not set
# CONFIG_TR is not set
CONFIG_WLAN=y
# CONFIG_LIBERTAS_THINFIRM is not set
# CONFIG_AIRO is not set
# CONFIG_ATMEL is not set
# CONFIG_AT76C50X_USB is not set
# CONFIG_PRISM54 is not set
# CONFIG_USB_ZD1201 is not set
# CONFIG_USB_NET_RNDIS_WLAN is not set
# CONFIG_RTL8180 is not set
# CONFIG_RTL8187 is not set
# CONFIG_ADM8211 is not set
# CONFIG_MAC80211_HWSIM is not set
# CONFIG_MWL8K is not set
# CONFIG_ATH_COMMON is not set
# CONFIG_B43 is not set
# CONFIG_B43LEGACY is not set
# CONFIG_HOSTAP is not set
# CONFIG_IPW2100 is not set
# CONFIG_IPW2200 is not set
# CONFIG_IWLAGN is not set
# CONFIG_IWL4965 is not set
# CONFIG_IWL3945 is not set
# CONFIG_LIBERTAS is not set
# CONFIG_HERMES is not set
# CONFIG_P54_COMMON is not set
CONFIG_RT2X00=m
# CONFIG_RT2400PCI is not set
# CONFIG_RT2500PCI is not set
# CONFIG_RT61PCI is not set
# CONFIG_RT2800PCI is not set
# CONFIG_RT2500USB is not set
# CONFIG_RT73USB is not set
CONFIG_RT2800USB=m
CONFIG_RT2800USB_RT33XX=y
CONFIG_RT2800USB_RT35XX=y
CONFIG_RT2800USB_RT53XX=y
# CONFIG_RT2800USB_UNKNOWN is not set
CONFIG_RT2800_LIB=m
CONFIG_RT2X00_LIB_USB=m
CONFIG_RT2X00_LIB=m
CONFIG_RT2X00_LIB_FIRMWARE=y
CONFIG_RT2X00_LIB_CRYPTO=y
# CONFIG_RT2X00_LIB_DEBUGFS is not set
# CONFIG_RT2X00_DEBUG is not set
# CONFIG_RTL8192CE is not set
# CONFIG_RTL8192SE is not set
# CONFIG_RTL8192CU is not set
# CONFIG_WL1251 is not set
# CONFIG_WL12XX_MENU is not set
# CONFIG_ZD1211RW is not set
# CONFIG_MWIFIEX is not set
#
# Enable WiMAX (Networking options) to see the WiMAX drivers
#
#
# USB Network Adapters
#
CONFIG_USB_CATC=m
CONFIG_USB_KAWETH=m
CONFIG_USB_PEGASUS=m
CONFIG_USB_RTL8150=m
CONFIG_USB_USBNET=m
# CONFIG_USB_NET_AX8817X is not set
CONFIG_USB_NET_CDCETHER=m
# CONFIG_USB_NET_CDC_EEM is not set
CONFIG_USB_NET_CDC_NCM=m
# CONFIG_USB_NET_DM9601 is not set
# CONFIG_USB_NET_SMSC75XX is not set
# CONFIG_USB_NET_SMSC95XX is not set
# CONFIG_USB_NET_GL620A is not set
# CONFIG_USB_NET_NET1080 is not set
# CONFIG_USB_NET_PLUSB is not set
# CONFIG_USB_NET_MCS7830 is not set
# CONFIG_USB_NET_RNDIS_HOST is not set
# CONFIG_USB_NET_CDC_SUBSET is not set
# CONFIG_USB_NET_ZAURUS is not set
# CONFIG_USB_NET_CX82310_ETH is not set
# CONFIG_USB_NET_KALMIA is not set
# CONFIG_USB_NET_INT51X1 is not set
# CONFIG_USB_IPHETH is not set
# CONFIG_USB_SIERRA_NET is not set
# CONFIG_USB_VL600 is not set
# CONFIG_WAN is not set
#
# CAIF transport drivers
#
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
CONFIG_PPP=m
# CONFIG_PPP_MULTILINK is not set
# CONFIG_PPP_FILTER is not set
CONFIG_PPP_ASYNC=m
CONFIG_PPP_SYNC_TTY=m
CONFIG_PPP_DEFLATE=m
CONFIG_PPP_BSDCOMP=m
# CONFIG_PPP_MPPE is not set
CONFIG_PPPOE=m
# CONFIG_SLIP is not set
CONFIG_SLHC=m
# CONFIG_NET_FC is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
# CONFIG_VMXNET3 is not set
# CONFIG_ISDN is not set
# CONFIG_PHONE is not set
#
# Input device support
#
CONFIG_INPUT=y
CONFIG_INPUT_FF_MEMLESS=y
# CONFIG_INPUT_POLLDEV is not set
# CONFIG_INPUT_SPARSEKMAP is not set
#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
CONFIG_INPUT_JOYDEV=m
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_EVBUG is not set
#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ADP5588 is not set
# CONFIG_KEYBOARD_ADP5589 is not set
# CONFIG_KEYBOARD_ATKBD is not set
# CONFIG_KEYBOARD_QT1070 is not set
# CONFIG_KEYBOARD_QT2160 is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_TCA6416 is not set
# CONFIG_KEYBOARD_MAX7359 is not set
# CONFIG_KEYBOARD_MCS is not set
# CONFIG_KEYBOARD_MPR121 is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_OPENCORES is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
CONFIG_INPUT_MOUSE=y
# CONFIG_MOUSE_PS2 is not set
# CONFIG_MOUSE_SERIAL is not set
# CONFIG_MOUSE_APPLETOUCH is not set
# CONFIG_MOUSE_BCM5974 is not set
# CONFIG_MOUSE_VSXXXAA is not set
# CONFIG_MOUSE_SYNAPTICS_I2C 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
#
# Hardware I/O ports
#
CONFIG_SERIO=y
# CONFIG_SERIO_I8042 is not set
# CONFIG_SERIO_SERPORT is not set
# CONFIG_SERIO_PCIPS2 is not set
# CONFIG_SERIO_RAW is not set
# CONFIG_SERIO_XILINX_XPS_PS2 is not set
# CONFIG_SERIO_ALTERA_PS2 is not set
# CONFIG_SERIO_PS2MULT is not set
# CONFIG_GAMEPORT is not set
#
# Character devices
#
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set
# CONFIG_N_GSM is not set
# CONFIG_TRACE_SINK is not set
CONFIG_DEVKMEM=y
#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set
#
# Non-8250 serial port support
#
# CONFIG_SERIAL_MFD_HSU is not set
# CONFIG_SERIAL_PMACZILOG is not set
# CONFIG_SERIAL_JSM is not set
# CONFIG_SERIAL_TIMBERDALE is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_PCH_UART is not set
# CONFIG_SERIAL_XILINX_PS_UART is not set
# CONFIG_HVC_UDBG is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
CONFIG_GEN_RTC=y
# CONFIG_GEN_RTC_X is not set
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
CONFIG_RAW_DRIVER=y
CONFIG_MAX_RAW_DEVS=256
# CONFIG_HANGCHECK_TIMER is not set
# CONFIG_TCG_TPM is not set
CONFIG_DEVPORT=y
# CONFIG_RAMOOPS is not set
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_COMPAT=y
CONFIG_I2C_CHARDEV=y
# CONFIG_I2C_MUX is not set
CONFIG_I2C_HELPER_AUTO=y
CONFIG_I2C_ALGOBIT=y
#
# I2C Hardware Bus support
#
#
# PC SMBus host controller drivers
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
# CONFIG_I2C_AMD756 is not set
# CONFIG_I2C_AMD8111 is not set
# CONFIG_I2C_I801 is not set
# CONFIG_I2C_ISCH is not set
# CONFIG_I2C_PIIX4 is not set
# CONFIG_I2C_NFORCE2 is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
# CONFIG_I2C_SIS96X is not set
# CONFIG_I2C_VIA is not set
# CONFIG_I2C_VIAPRO is not set
#
# Mac SMBus host controller drivers
#
CONFIG_I2C_POWERMAC=y
#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_INTEL_MID is not set
# CONFIG_I2C_MPC is not set
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_PXA_PCI is not set
# CONFIG_I2C_SIMTEC is not set
# CONFIG_I2C_XILINX is not set
# CONFIG_I2C_EG20T is not set
#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_DIOLAN_U2C is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set
#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_STUB is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_SPI is not set
#
# PPS support
#
# CONFIG_PPS is not set
#
# PPS generators support
#
#
# PTP clock support
#
#
# Enable Device Drivers -> PPS to see the PTP clock options.
#
CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y
# CONFIG_GPIOLIB is not set
# CONFIG_W1 is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
# CONFIG_THERMAL is not set
# CONFIG_WATCHDOG is not set
CONFIG_SSB_POSSIBLE=y
#
# Sonics Silicon Backplane
#
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y
#
# Broadcom specific AMBA
#
# CONFIG_BCMA is not set
CONFIG_MFD_SUPPORT=y
# CONFIG_MFD_CORE is not set
# CONFIG_MFD_88PM860X is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_TPS6105X is not set
# CONFIG_TPS6507X is not set
# CONFIG_TWL4030_CORE is not set
# CONFIG_MFD_STMPE is not set
# CONFIG_MFD_TC3589X is not set
# CONFIG_MFD_TMIO is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_PMIC_ADP5520 is not set
# CONFIG_MFD_MAX8925 is not set
# CONFIG_MFD_MAX8997 is not set
# CONFIG_MFD_MAX8998 is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM831X_I2C is not set
# CONFIG_MFD_WM8350_I2C is not set
# CONFIG_MFD_WM8994 is not set
# CONFIG_MFD_PCF50633 is not set
# CONFIG_ABX500_CORE is not set
# CONFIG_LPC_SCH is not set
# CONFIG_MFD_RDC321X is not set
# CONFIG_MFD_JANZ_CMODIO is not set
# CONFIG_MFD_VX855 is not set
# CONFIG_MFD_WL1273_CORE is not set
# CONFIG_REGULATOR is not set
# CONFIG_MEDIA_SUPPORT is not set
#
# Graphics support
#
CONFIG_AGP=m
CONFIG_AGP_UNINORTH=m
CONFIG_VGA_ARB=y
CONFIG_VGA_ARB_MAX_GPUS=16
# CONFIG_DRM is not set
# CONFIG_STUB_POULSBO is not set
CONFIG_VGASTATE=y
CONFIG_VIDEO_OUTPUT_CONTROL=m
CONFIG_FB=y
CONFIG_FIRMWARE_EDID=y
CONFIG_FB_DDC=y
# CONFIG_FB_BOOT_VESA_SUPPORT is not set
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
# CONFIG_FB_SYS_FILLRECT is not set
# CONFIG_FB_SYS_COPYAREA is not set
# CONFIG_FB_SYS_IMAGEBLIT is not set
# CONFIG_FB_FOREIGN_ENDIAN is not set
# CONFIG_FB_SYS_FOPS is not set
# CONFIG_FB_WMT_GE_ROPS is not set
# CONFIG_FB_SVGALIB is not set
CONFIG_FB_MACMODES=y
CONFIG_FB_BACKLIGHT=y
CONFIG_FB_MODE_HELPERS=y
CONFIG_FB_TILEBLITTING=y
#
# Frame buffer hardware drivers
#
# CONFIG_FB_CIRRUS is not set
# CONFIG_FB_PM2 is not set
# CONFIG_FB_CYBER2000 is not set
CONFIG_FB_OF=y
# CONFIG_FB_ASILIANT is not set
# CONFIG_FB_IMSTT is not set
# CONFIG_FB_VGA16 is not set
# CONFIG_FB_S1D13XXX is not set
CONFIG_FB_NVIDIA=y
CONFIG_FB_NVIDIA_I2C=y
# CONFIG_FB_NVIDIA_DEBUG is not set
CONFIG_FB_NVIDIA_BACKLIGHT=y
# CONFIG_FB_RIVA is not set
# CONFIG_FB_MATROX is not set
# CONFIG_FB_RADEON is not set
# CONFIG_FB_ATY128 is not set
# CONFIG_FB_ATY is not set
# CONFIG_FB_S3 is not set
# CONFIG_FB_SAVAGE is not set
# CONFIG_FB_SIS is not set
# CONFIG_FB_NEOMAGIC is not set
# CONFIG_FB_KYRO is not set
# CONFIG_FB_3DFX is not set
# CONFIG_FB_VOODOO1 is not set
# CONFIG_FB_VT8623 is not set
# CONFIG_FB_TRIDENT is not set
# CONFIG_FB_ARK is not set
# CONFIG_FB_PM3 is not set
# CONFIG_FB_CARMINE is not set
# CONFIG_FB_UDL is not set
# CONFIG_FB_IBM_GXT4500 is not set
# CONFIG_FB_VIRTUAL is not set
# CONFIG_FB_METRONOME is not set
# CONFIG_FB_MB862XX is not set
# CONFIG_FB_BROADSHEET is not set
CONFIG_BACKLIGHT_LCD_SUPPORT=y
CONFIG_LCD_CLASS_DEVICE=m
# CONFIG_LCD_PLATFORM is not set
CONFIG_BACKLIGHT_CLASS_DEVICE=y
CONFIG_BACKLIGHT_GENERIC=y
# CONFIG_BACKLIGHT_ADP8860 is not set
# CONFIG_BACKLIGHT_ADP8870 is not set
#
# Display device support
#
# CONFIG_DISPLAY_SUPPORT is not set
#
# Console display driver support
#
# CONFIG_VGA_CONSOLE is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
# CONFIG_FONTS is not set
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
CONFIG_LOGO=y
CONFIG_LOGO_LINUX_MONO=y
CONFIG_LOGO_LINUX_VGA16=y
CONFIG_LOGO_LINUX_CLUT224=y
CONFIG_SOUND=m
CONFIG_SOUND_OSS_CORE=y
CONFIG_SOUND_OSS_CORE_PRECLAIM=y
CONFIG_SND=m
CONFIG_SND_TIMER=m
CONFIG_SND_PCM=m
CONFIG_SND_HWDEP=m
CONFIG_SND_RAWMIDI=m
CONFIG_SND_SEQUENCER=m
# CONFIG_SND_SEQ_DUMMY is not set
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=m
CONFIG_SND_PCM_OSS=m
CONFIG_SND_PCM_OSS_PLUGINS=y
CONFIG_SND_SEQUENCER_OSS=y
# CONFIG_SND_HRTIMER is not set
# CONFIG_SND_DYNAMIC_MINORS is not set
CONFIG_SND_SUPPORT_OLD_API=y
CONFIG_SND_VERBOSE_PROCFS=y
# CONFIG_SND_VERBOSE_PRINTK is not set
# CONFIG_SND_DEBUG is not set
CONFIG_SND_VMASTER=y
CONFIG_SND_RAWMIDI_SEQ=m
# CONFIG_SND_OPL3_LIB_SEQ is not set
# CONFIG_SND_OPL4_LIB_SEQ is not set
# CONFIG_SND_SBAWE_SEQ is not set
# CONFIG_SND_EMU10K1_SEQ is not set
CONFIG_SND_DRIVERS=y
# CONFIG_SND_DUMMY is not set
# CONFIG_SND_ALOOP is not set
# CONFIG_SND_VIRMIDI is not set
# CONFIG_SND_MTPAV is not set
# CONFIG_SND_SERIAL_U16550 is not set
# CONFIG_SND_MPU401 is not set
CONFIG_SND_PCI=y
# CONFIG_SND_AD1889 is not set
# CONFIG_SND_ALS300 is not set
# CONFIG_SND_ALS4000 is not set
# CONFIG_SND_ALI5451 is not set
# CONFIG_SND_ATIIXP is not set
# CONFIG_SND_ATIIXP_MODEM is not set
# CONFIG_SND_AU8810 is not set
# CONFIG_SND_AU8820 is not set
# CONFIG_SND_AU8830 is not set
# CONFIG_SND_AW2 is not set
# CONFIG_SND_AZT3328 is not set
# CONFIG_SND_BT87X is not set
# CONFIG_SND_CA0106 is not set
# CONFIG_SND_CMIPCI is not set
# CONFIG_SND_OXYGEN is not set
# CONFIG_SND_CS4281 is not set
# CONFIG_SND_CS46XX is not set
# CONFIG_SND_CS5530 is not set
# CONFIG_SND_CS5535AUDIO is not set
# CONFIG_SND_CTXFI is not set
# CONFIG_SND_DARLA20 is not set
# CONFIG_SND_GINA20 is not set
# CONFIG_SND_LAYLA20 is not set
# CONFIG_SND_DARLA24 is not set
# CONFIG_SND_GINA24 is not set
# CONFIG_SND_LAYLA24 is not set
# CONFIG_SND_MONA is not set
# CONFIG_SND_MIA is not set
# CONFIG_SND_ECHO3G is not set
# CONFIG_SND_INDIGO is not set
# CONFIG_SND_INDIGOIO is not set
# CONFIG_SND_INDIGODJ is not set
# CONFIG_SND_INDIGOIOX is not set
# CONFIG_SND_INDIGODJX is not set
# CONFIG_SND_EMU10K1 is not set
# CONFIG_SND_EMU10K1X is not set
# CONFIG_SND_ENS1370 is not set
# CONFIG_SND_ENS1371 is not set
# CONFIG_SND_ES1938 is not set
# CONFIG_SND_ES1968 is not set
# CONFIG_SND_FM801 is not set
# CONFIG_SND_HDA_INTEL is not set
# CONFIG_SND_HDSP is not set
# CONFIG_SND_HDSPM is not set
# CONFIG_SND_ICE1712 is not set
# CONFIG_SND_ICE1724 is not set
# CONFIG_SND_INTEL8X0 is not set
# CONFIG_SND_INTEL8X0M is not set
# CONFIG_SND_KORG1212 is not set
# CONFIG_SND_LOLA is not set
# CONFIG_SND_LX6464ES is not set
# CONFIG_SND_MAESTRO3 is not set
# CONFIG_SND_MIXART is not set
# CONFIG_SND_NM256 is not set
# CONFIG_SND_PCXHR is not set
# CONFIG_SND_RIPTIDE is not set
# CONFIG_SND_RME32 is not set
# CONFIG_SND_RME96 is not set
# CONFIG_SND_RME9652 is not set
# CONFIG_SND_SONICVIBES is not set
# CONFIG_SND_TRIDENT is not set
# CONFIG_SND_VIA82XX is not set
# CONFIG_SND_VIA82XX_MODEM is not set
# CONFIG_SND_VIRTUOSO is not set
# CONFIG_SND_VX222 is not set
# CONFIG_SND_YMFPCI is not set
CONFIG_SND_PPC=y
CONFIG_SND_POWERMAC=m
CONFIG_SND_POWERMAC_AUTO_DRC=y
CONFIG_SND_AOA=m
CONFIG_SND_AOA_FABRIC_LAYOUT=m
CONFIG_SND_AOA_ONYX=m
CONFIG_SND_AOA_TAS=m
CONFIG_SND_AOA_TOONIE=m
CONFIG_SND_AOA_SOUNDBUS=m
CONFIG_SND_AOA_SOUNDBUS_I2S=m
CONFIG_SND_USB=y
CONFIG_SND_USB_AUDIO=m
# CONFIG_SND_USB_UA101 is not set
# CONFIG_SND_USB_USX2Y is not set
# CONFIG_SND_USB_CAIAQ is not set
# CONFIG_SND_USB_6FIRE is not set
# CONFIG_SND_SOC is not set
# CONFIG_SOUND_PRIME is not set
CONFIG_HID_SUPPORT=y
CONFIG_HID=y
# CONFIG_HIDRAW is not set
#
# USB Input Devices
#
CONFIG_USB_HID=y
CONFIG_HID_PID=y
CONFIG_USB_HIDDEV=y
#
# Special HID drivers
#
CONFIG_HID_A4TECH=y
# CONFIG_HID_ACRUX is not set
CONFIG_HID_APPLE=y
CONFIG_HID_BELKIN=y
CONFIG_HID_CHERRY=y
CONFIG_HID_CHICONY=y
# CONFIG_HID_PRODIKEYS is not set
CONFIG_HID_CYPRESS=y
# CONFIG_HID_DRAGONRISE is not set
# CONFIG_HID_EMS_FF is not set
CONFIG_HID_EZKEY=y
# CONFIG_HID_KEYTOUCH is not set
CONFIG_HID_KYE=y
# CONFIG_HID_UCLOGIC is not set
# CONFIG_HID_WALTOP is not set
CONFIG_HID_GYRATION=y
# CONFIG_HID_TWINHAN is not set
CONFIG_HID_KENSINGTON=y
# CONFIG_HID_LCPOWER is not set
CONFIG_HID_LOGITECH=y
CONFIG_LOGITECH_FF=y
# CONFIG_LOGIRUMBLEPAD2_FF is not set
# CONFIG_LOGIG940_FF is not set
# CONFIG_LOGIWII_FF is not set
CONFIG_HID_MICROSOFT=y
CONFIG_HID_MONTEREY=y
# CONFIG_HID_MULTITOUCH is not set
# CONFIG_HID_NTRIG is not set
# CONFIG_HID_ORTEK is not set
CONFIG_HID_PANTHERLORD=y
# CONFIG_PANTHERLORD_FF is not set
CONFIG_HID_PETALYNX=y
# CONFIG_HID_PICOLCD is not set
# CONFIG_HID_QUANTA is not set
# CONFIG_HID_ROCCAT is not set
# CONFIG_HID_ROCCAT_ARVO is not set
# CONFIG_HID_ROCCAT_KONE is not set
# CONFIG_HID_ROCCAT_KONEPLUS is not set
# CONFIG_HID_ROCCAT_KOVAPLUS is not set
# CONFIG_HID_ROCCAT_PYRA is not set
CONFIG_HID_SAMSUNG=y
CONFIG_HID_SONY=y
CONFIG_HID_SUNPLUS=y
# CONFIG_HID_GREENASIA is not set
# CONFIG_HID_SMARTJOYPLUS is not set
# CONFIG_HID_TOPSEED is not set
# CONFIG_HID_THRUSTMASTER is not set
# CONFIG_HID_ZEROPLUS is not set
# CONFIG_HID_ZYDACRON is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
# CONFIG_USB_DEBUG is not set
# CONFIG_USB_ANNOUNCE_NEW_DEVICES is not set
#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
CONFIG_USB_DEVICE_CLASS=y
# CONFIG_USB_DYNAMIC_MINORS is not set
CONFIG_USB_MON=y
# CONFIG_USB_WUSB is not set
# CONFIG_USB_WUSB_CBAF is not set
#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
# CONFIG_USB_XHCI_HCD is not set
CONFIG_USB_EHCI_HCD=y
# CONFIG_USB_EHCI_ROOT_HUB_TT is not set
CONFIG_USB_EHCI_TT_NEWSCHED=y
# CONFIG_USB_EHCI_HCD_PPC_OF is not set
# CONFIG_USB_OXU210HP_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_ISP1760_HCD is not set
# CONFIG_USB_ISP1362_HCD is not set
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_OHCI_HCD_PPC_OF_BE=y
# CONFIG_USB_OHCI_HCD_PPC_OF_LE is not set
CONFIG_USB_OHCI_HCD_PPC_OF=y
CONFIG_USB_OHCI_HCD_PCI=y
CONFIG_USB_OHCI_BIG_ENDIAN_DESC=y
CONFIG_USB_OHCI_BIG_ENDIAN_MMIO=y
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
# CONFIG_USB_UHCI_HCD is not set
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_WHCI_HCD is not set
# CONFIG_USB_HWA_HCD is not set
#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
# CONFIG_USB_PRINTER is not set
# CONFIG_USB_WDM is not set
# CONFIG_USB_TMC is not set
#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#
#
# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_REALTEK is not set
CONFIG_USB_STORAGE_DATAFAB=y
CONFIG_USB_STORAGE_FREECOM=y
CONFIG_USB_STORAGE_ISD200=y
# CONFIG_USB_STORAGE_USBAT is not set
CONFIG_USB_STORAGE_SDDR09=y
CONFIG_USB_STORAGE_SDDR55=y
CONFIG_USB_STORAGE_JUMPSHOT=y
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_ONETOUCH is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
# CONFIG_USB_STORAGE_ENE_UB6250 is not set
# CONFIG_USB_LIBUSUAL is not set
#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set
#
# USB port drivers
#
# CONFIG_USB_SERIAL is not set
#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_YUREX is not set
# CONFIG_USB_GADGET is not set
#
# OTG and related infrastructure
#
# CONFIG_NOP_USB_XCEIV 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_NFC_DEVICES is not set
# CONFIG_ACCESSIBILITY is not set
# CONFIG_INFINIBAND is not set
# CONFIG_EDAC is not set
# CONFIG_RTC_CLASS is not set
# CONFIG_DMADEVICES is not set
# CONFIG_AUXDISPLAY is not set
# CONFIG_UIO is not set
# CONFIG_STAGING is not set
#
# File systems
#
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
CONFIG_EXT2_FS_SECURITY=y
CONFIG_EXT2_FS_XIP=y
CONFIG_EXT3_FS=y
CONFIG_EXT3_DEFAULTS_TO_ORDERED=y
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
CONFIG_EXT3_FS_SECURITY=y
CONFIG_EXT4_FS=y
CONFIG_EXT4_FS_XATTR=y
# CONFIG_EXT4_FS_POSIX_ACL is not set
# CONFIG_EXT4_FS_SECURITY is not set
# CONFIG_EXT4_DEBUG is not set
CONFIG_FS_XIP=y
CONFIG_JBD=y
# CONFIG_JBD_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_BTRFS_FS is not set
# CONFIG_NILFS2_FS is not set
CONFIG_FS_POSIX_ACL=y
CONFIG_EXPORTFS=y
CONFIG_FILE_LOCKING=y
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_FANOTIFY is not set
# CONFIG_QUOTA is not set
# CONFIG_QUOTACTL is not set
# CONFIG_AUTOFS4_FS is not set
CONFIG_FUSE_FS=m
CONFIG_CUSE=m
CONFIG_GENERIC_ACL=y
#
# Caches
#
# CONFIG_FSCACHE is not set
#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=y
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=m
CONFIG_UDF_NLS=y
#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
CONFIG_NTFS_FS=m
# CONFIG_NTFS_DEBUG is not set
CONFIG_NTFS_RW=y
#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_TMPFS_XATTR=y
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
# CONFIG_CONFIGFS_FS is not set
CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_ECRYPT_FS is not set
CONFIG_HFS_FS=m
CONFIG_HFSPLUS_FS=m
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_LOGFS is not set
CONFIG_CRAMFS=y
# CONFIG_SQUASHFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_PSTORE is not set
# CONFIG_SYSV_FS is not set
CONFIG_UFS_FS=m
CONFIG_UFS_FS_WRITE=y
# CONFIG_UFS_DEBUG is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
CONFIG_NFS_V3_ACL=y
CONFIG_NFS_V4=y
# CONFIG_NFS_V4_1 is not set
# CONFIG_NFS_USE_LEGACY_DNS is not set
CONFIG_NFS_USE_KERNEL_DNS=y
# CONFIG_NFS_USE_NEW_IDMAPPER is not set
CONFIG_NFSD=y
CONFIG_NFSD_DEPRECATED=y
CONFIG_NFSD_V2_ACL=y
CONFIG_NFSD_V3=y
CONFIG_NFSD_V3_ACL=y
CONFIG_NFSD_V4=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_NFS_ACL_SUPPORT=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=y
# CONFIG_CEPH_FS is not set
CONFIG_CIFS=m
# CONFIG_CIFS_STATS is not set
# CONFIG_CIFS_WEAK_PW_HASH is not set
# CONFIG_CIFS_UPCALL is not set
# CONFIG_CIFS_XATTR is not set
# CONFIG_CIFS_DEBUG2 is not set
# CONFIG_CIFS_DFS_UPCALL is not set
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
# CONFIG_OSF_PARTITION is not set
# CONFIG_AMIGA_PARTITION is not set
# CONFIG_ATARI_PARTITION is not set
CONFIG_MAC_PARTITION=y
CONFIG_MSDOS_PARTITION=y
CONFIG_BSD_DISKLABEL=y
# CONFIG_MINIX_SUBPARTITION is not set
# CONFIG_SOLARIS_X86_PARTITION is not set
# CONFIG_UNIXWARE_DISKLABEL is not set
# 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_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
CONFIG_NLS_CODEPAGE_1250=y
CONFIG_NLS_CODEPAGE_1251=y
CONFIG_NLS_ASCII=y
CONFIG_NLS_ISO8859_1=y
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
CONFIG_NLS_ISO8859_15=y
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=y
# CONFIG_BINARY_PRINTF is not set
#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_CRC_CCITT=m
CONFIG_CRC16=y
CONFIG_CRC_T10DIF=y
CONFIG_CRC_ITU_T=m
CONFIG_CRC32=y
# CONFIG_CRC7 is not set
CONFIG_LIBCRC32C=m
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=m
CONFIG_LZO_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_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
CONFIG_CPU_RMAP=y
CONFIG_NLATTR=y
CONFIG_AVERAGE=y
#
# Kernel hacking
#
CONFIG_PRINTK_TIME=y
CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4
CONFIG_ENABLE_WARN_DEPRECATED=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_WARN=2048
CONFIG_MAGIC_SYSRQ=y
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_UNUSED_SYMBOLS is not set
CONFIG_DEBUG_FS=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_SECTION_MISMATCH is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
# CONFIG_LOCKUP_DETECTOR is not set
# CONFIG_HARDLOCKUP_DETECTOR is not set
# CONFIG_DETECT_HUNG_TASK is not set
CONFIG_SCHED_DEBUG=y
CONFIG_SCHEDSTATS=y
# CONFIG_TIMER_STATS is not set
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_SLUB_DEBUG_ON is not set
# CONFIG_SLUB_STATS is not set
# CONFIG_DEBUG_KMEMLEAK is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
CONFIG_DEBUG_MUTEXES=y
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_PROVE_LOCKING is not set
# CONFIG_SPARSE_RCU_POINTER is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
CONFIG_STACKTRACE=y
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_BUGVERBOSE=y
# CONFIG_DEBUG_INFO is not set
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_WRITECOUNT is not set
CONFIG_DEBUG_MEMORY_INIT=y
# CONFIG_DEBUG_LIST is not set
# CONFIG_TEST_LIST_SORT is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
# CONFIG_DEBUG_CREDENTIALS is not set
# CONFIG_RCU_TORTURE_TEST is not set
CONFIG_RCU_CPU_STALL_TIMEOUT=60
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
# CONFIG_DEBUG_PER_CPU_MAPS is not set
# CONFIG_LKDTM is not set
# CONFIG_CPU_NOTIFIER_ERROR_INJECT is not set
# CONFIG_FAULT_INJECTION is not set
CONFIG_LATENCYTOP=y
CONFIG_SYSCTL_SYSCALL_CHECK=y
# CONFIG_DEBUG_PAGEALLOC is not set
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_RING_BUFFER=y
CONFIG_RING_BUFFER_ALLOW_SWAP=y
CONFIG_TRACING_SUPPORT=y
CONFIG_FTRACE=y
# CONFIG_FUNCTION_TRACER is not set
# CONFIG_IRQSOFF_TRACER is not set
# CONFIG_SCHED_TRACER is not set
# CONFIG_ENABLE_DEFAULT_TRACERS is not set
# CONFIG_FTRACE_SYSCALLS is not set
CONFIG_BRANCH_PROFILE_NONE=y
# CONFIG_PROFILE_ANNOTATED_BRANCHES is not set
# CONFIG_PROFILE_ALL_BRANCHES is not set
# CONFIG_STACK_TRACER is not set
# CONFIG_BLK_DEV_IO_TRACE is not set
# CONFIG_RING_BUFFER_BENCHMARK is not set
# CONFIG_DYNAMIC_DEBUG is not set
# CONFIG_DMA_API_DEBUG is not set
# CONFIG_ATOMIC64_SELFTEST is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
# CONFIG_TEST_KSTRTOX is not set
# CONFIG_PPC_DISABLE_WERROR is not set
CONFIG_PPC_WERROR=y
CONFIG_PRINT_STACK_DEPTH=64
# CONFIG_DEBUG_STACKOVERFLOW is not set
# CONFIG_PPC_EMULATED_STATS is not set
# CONFIG_CODE_PATCHING_SELFTEST is not set
# CONFIG_FTR_FIXUP_SELFTEST is not set
# CONFIG_MSI_BITMAP_SELFTEST is not set
# CONFIG_XMON is not set
# CONFIG_VIRQ_DEBUG is not set
CONFIG_BOOTX_TEXT=y
# CONFIG_PPC_EARLY_DEBUG is not set
#
# Security options
#
CONFIG_KEYS=y
# CONFIG_KEYS_DEBUG_PROC_KEYS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_DEFAULT_SECURITY=""
CONFIG_KEYS_COMPAT=y
CONFIG_CRYPTO=y
#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD=m
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_BLKCIPHER=m
CONFIG_CRYPTO_BLKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_PCOMP2=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
# CONFIG_CRYPTO_GF128MUL is not set
CONFIG_CRYPTO_NULL=m
# CONFIG_CRYPTO_PCRYPT is not set
CONFIG_CRYPTO_WORKQUEUE=y
# CONFIG_CRYPTO_CRYPTD is not set
CONFIG_CRYPTO_AUTHENC=m
CONFIG_CRYPTO_TEST=m
#
# Authenticated Encryption with Associated Data
#
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_SEQIV is not set
#
# Block modes
#
CONFIG_CRYPTO_CBC=m
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_CTS is not set
CONFIG_CRYPTO_ECB=m
# CONFIG_CRYPTO_LRW is not set
CONFIG_CRYPTO_PCBC=m
# CONFIG_CRYPTO_XTS is not set
#
# Hash modes
#
CONFIG_CRYPTO_HMAC=y
# CONFIG_CRYPTO_XCBC is not set
# CONFIG_CRYPTO_VMAC is not set
#
# Digest
#
CONFIG_CRYPTO_CRC32C=m
# CONFIG_CRYPTO_GHASH is not set
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_MD5=m
CONFIG_CRYPTO_MICHAEL_MIC=m
# CONFIG_CRYPTO_RMD128 is not set
# CONFIG_CRYPTO_RMD160 is not set
# CONFIG_CRYPTO_RMD256 is not set
# CONFIG_CRYPTO_RMD320 is not set
CONFIG_CRYPTO_SHA1=m
CONFIG_CRYPTO_SHA256=m
CONFIG_CRYPTO_SHA512=m
# CONFIG_CRYPTO_TGR192 is not set
CONFIG_CRYPTO_WP512=m
#
# Ciphers
#
CONFIG_CRYPTO_AES=m
CONFIG_CRYPTO_ANUBIS=m
CONFIG_CRYPTO_ARC4=m
CONFIG_CRYPTO_BLOWFISH=m
# CONFIG_CRYPTO_CAMELLIA is not set
CONFIG_CRYPTO_CAST5=m
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_DES=m
# CONFIG_CRYPTO_FCRYPT is not set
CONFIG_CRYPTO_KHAZAD=m
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_SEED is not set
CONFIG_CRYPTO_SERPENT=m
CONFIG_CRYPTO_TEA=m
CONFIG_CRYPTO_TWOFISH=m
CONFIG_CRYPTO_TWOFISH_COMMON=m
#
# Compression
#
CONFIG_CRYPTO_DEFLATE=m
# CONFIG_CRYPTO_ZLIB is not set
# CONFIG_CRYPTO_LZO is not set
#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
# CONFIG_CRYPTO_USER_API_HASH is not set
# CONFIG_CRYPTO_USER_API_SKCIPHER is not set
# CONFIG_CRYPTO_HW is not set
# CONFIG_PPC_CLOCK is not set
# CONFIG_VIRTUALIZATION is not set
^ permalink raw reply
* Re: Linux kernel 3.x problems on PowerMac G5
From: Benjamin Herrenschmidt @ 2013-03-03 9:38 UTC (permalink / raw)
To: Denis Kirjanov; +Cc: Phileas Fogg, linuxppc-dev, Andreas Schwab, Aaro Koskinen
In-Reply-To: <CAHj3AVni2t1-Hrn-jAKjsqo=0oFkVjkQ0KApNQk52buNTruDqQ@mail.gmail.com>
On Sun, 2013-03-03 at 11:23 +0300, Denis Kirjanov wrote:
> I'm running 3.7.6 without any problems on my quad core machine. You
> have to try to compile with g5_defconfig...
Sure but I still want to know what in his config is breaking it, chances
are that's something that we should fix :-)
Cheers,
Ben.
^ permalink raw reply
* Re: Linux kernel 3.x problems on PowerMac G5
From: Denis Kirjanov @ 2013-03-03 8:23 UTC (permalink / raw)
To: Benjamin Herrenschmidt
Cc: Phileas Fogg, linuxppc-dev, Andreas Schwab, Aaro Koskinen
In-Reply-To: <1362288663.2969.15.camel@pasglop>
I'm running 3.7.6 without any problems on my quad core machine. You
have to try to compile with g5_defconfig...
On 3/3/13, Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
> On Sat, 2013-03-02 at 17:22 +0100, Andreas Schwab wrote:
>> > Thanks. Then i configured something wrongly probably.
>> > I tried Linux 2.6.39.4 and it boots too.
>> > I looked around on the Internet and it seems i'm not the only one
>> > who has problems with Linux 3.x on my PowerMac G5.
>>
>> I have no problem with 3.8 either, but mine is a PowerMac7,3.
>
> Ok. I have a quad core G5 which is also a 11,2, it's even my primary
> workstation in the office :-) So it tends to work fine but I admit I
> haven't updated the kernel on it in a while.
>
> Phileas, send me the .config you're using, there might be an issue
> there, I'll do some tests next week.
>
> Cheers,
> Ben.
>
>
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@lists.ozlabs.org
> https://lists.ozlabs.org/listinfo/linuxppc-dev
>
--
Regards,
Denis
^ permalink raw reply
* Re: Linux kernel 3.x problems on PowerMac G5
From: Benjamin Herrenschmidt @ 2013-03-03 5:31 UTC (permalink / raw)
To: Andreas Schwab; +Cc: Phileas Fogg, linuxppc-dev, Aaro Koskinen
In-Reply-To: <m2txotzs8y.fsf@igel.home>
On Sat, 2013-03-02 at 17:22 +0100, Andreas Schwab wrote:
> > Thanks. Then i configured something wrongly probably.
> > I tried Linux 2.6.39.4 and it boots too.
> > I looked around on the Internet and it seems i'm not the only one
> > who has problems with Linux 3.x on my PowerMac G5.
>
> I have no problem with 3.8 either, but mine is a PowerMac7,3.
Ok. I have a quad core G5 which is also a 11,2, it's even my primary
workstation in the office :-) So it tends to work fine but I admit I
haven't updated the kernel on it in a while.
Phileas, send me the .config you're using, there might be an issue
there, I'll do some tests next week.
Cheers,
Ben.
^ permalink raw reply
* Re: Linux kernel 3.x problems on PowerMac G5
From: Benjamin Herrenschmidt @ 2013-03-03 5:29 UTC (permalink / raw)
To: Phileas Fogg; +Cc: linuxppc-dev
In-Reply-To: <51320F53.9040000@mail.ru>
On Sat, 2013-03-02 at 15:40 +0100, Phileas Fogg wrote:
> recently i got a PowerMac G5 and installed Debian Linux 2.6.32 on it.
> Everything works so far and Debian boots properly.
>
> Today i tried to boot Linux 3 on the machine and it doesn't boot.
> The Linux 3 kernel was cross-compiled by me.
>
> On Linux 3.8.1 it hangs after this line:
> ---
> windfarm: Drive bay control loop started.
>
> And then i'm getting RCU stall call traces.
>
> On Linux 3.2 it hangs too but not at the same place.
> It hangs after some SCSI message.
>
> Have anyone tested Linux 3 kernels on PowerMac G5 recently ?
Hrm, this is odd. I do run pretty much every release on my G5's without
problems... Can you send me your .config and then try with a
g5_defconfig just to see if it makes a difference ?
There *might* have been a problem on those older machines vs. the 64T
address space patches, so maybe try back 3.6 and 3.7 and let me know,
I'm still trying to get the right fix in (I know it breaks PS/3 under
some circumstances).
Cheers,
Ben.
^ permalink raw reply
* Re: [PATCH V2] lglock: add read-preference local-global rwlock
From: Oleg Nesterov @ 2013-03-02 17:20 UTC (permalink / raw)
To: Lai Jiangshan
Cc: Lai Jiangshan, linux-doc, peterz, fweisbec, Michel Lespinasse,
mingo, linux-arch, linux, xiaoguangrong, wangyun, paulmck, nikunj,
linux-pm, rusty, rostedt, rjw, namhyung, tglx, linux-arm-kernel,
netdev, linux-kernel, vincent.guittot, sbw, Srivatsa S. Bhat, tj,
akpm, linuxppc-dev
In-Reply-To: <5131FB4C.7070408@cn.fujitsu.com>
On 03/02, Lai Jiangshan wrote:
>
> +void lg_rwlock_local_read_unlock(struct lgrwlock *lgrw)
> +{
> + switch (__this_cpu_read(*lgrw->reader_refcnt)) {
> + case 1:
> + __this_cpu_write(*lgrw->reader_refcnt, 0);
> + lg_local_unlock(&lgrw->lglock);
> + return;
> + case FALLBACK_BASE:
> + __this_cpu_write(*lgrw->reader_refcnt, 0);
> + read_unlock(&lgrw->fallback_rwlock);
> + rwlock_release(&lg->lock_dep_map, 1, _RET_IP_);
I guess "case 1:" should do rwlock_release() too.
Otherwise, at first glance looks correct...
However, I still think that FALLBACK_BASE only adds the unnecessary
complications. But even if I am right this is subjective of course, please
feel free to ignore.
And btw, I am not sure about lg->lock_dep_map, perhaps we should use
fallback_rwlock->dep_map ?
We need rwlock_acquire_read() even in the fast-path, and this acquire_read
should be paired with rwlock_acquire() in _write_lock(), but it does
spin_acquire(lg->lock_dep_map). Yes, currently this is the same (afaics)
but perhaps fallback_rwlock->dep_map would be more clean.
Oleg.
^ permalink raw reply
* Re: [PATCH V2] lglock: add read-preference local-global rwlock
From: Srivatsa S. Bhat @ 2013-03-02 17:11 UTC (permalink / raw)
To: Lai Jiangshan
Cc: Lai Jiangshan, linux-doc, peterz, fweisbec, linux-kernel,
Michel Lespinasse, mingo, linux-arch, linux, xiaoguangrong,
wangyun, paulmck, nikunj, linux-pm, rusty, rostedt, rjw, namhyung,
tglx, linux-arm-kernel, netdev, Oleg Nesterov, vincent.guittot,
sbw, tj, akpm, linuxppc-dev
In-Reply-To: <5131FB4C.7070408@cn.fujitsu.com>
On 03/02/2013 06:44 PM, Lai Jiangshan wrote:
> From 345a7a75c314ff567be48983e0892bc69c4452e7 Mon Sep 17 00:00:00 2001
> From: Lai Jiangshan <laijs@cn.fujitsu.com>
> Date: Sat, 2 Mar 2013 20:33:14 +0800
> Subject: [PATCH] lglock: add read-preference local-global rwlock
>
> Current lglock is not read-preference, so it can't be used on some cases
> which read-preference rwlock can do. Example, get_cpu_online_atomic().
>
[...]
> diff --git a/kernel/lglock.c b/kernel/lglock.c
> index 6535a66..52e9b2c 100644
> --- a/kernel/lglock.c
> +++ b/kernel/lglock.c
> @@ -87,3 +87,71 @@ void lg_global_unlock(struct lglock *lg)
> preempt_enable();
> }
> EXPORT_SYMBOL(lg_global_unlock);
> +
> +#define FALLBACK_BASE (1UL << 30)
> +
> +void lg_rwlock_local_read_lock(struct lgrwlock *lgrw)
> +{
> + struct lglock *lg = &lgrw->lglock;
> +
> + preempt_disable();
> + if (likely(!__this_cpu_read(*lgrw->reader_refcnt))) {
> + rwlock_acquire_read(&lg->lock_dep_map, 0, 0, _RET_IP_);
> + if (unlikely(!arch_spin_trylock(this_cpu_ptr(lg->lock)))) {
> + read_lock(&lgrw->fallback_rwlock);
> + __this_cpu_write(*lgrw->reader_refcnt, FALLBACK_BASE);
> + return;
> + }
> + }
> +
> + __this_cpu_inc(*lgrw->reader_refcnt);
> +}
> +EXPORT_SYMBOL(lg_rwlock_local_read_lock);
> +
> +void lg_rwlock_local_read_unlock(struct lgrwlock *lgrw)
> +{
> + switch (__this_cpu_read(*lgrw->reader_refcnt)) {
> + case 1:
> + __this_cpu_write(*lgrw->reader_refcnt, 0);
> + lg_local_unlock(&lgrw->lglock);
> + return;
This should be a break, instead of a return, right?
Otherwise, there will be a preempt imbalance...
> + case FALLBACK_BASE:
> + __this_cpu_write(*lgrw->reader_refcnt, 0);
> + read_unlock(&lgrw->fallback_rwlock);
> + rwlock_release(&lg->lock_dep_map, 1, _RET_IP_);
> + break;
> + default:
> + __this_cpu_dec(*lgrw->reader_refcnt);
> + break;
> + }
> +
> + preempt_enable();
> +}
Regards,
Srivatsa S. Bhat
^ permalink raw reply
* Re: [PATCH] lglock: add read-preference local-global rwlock
From: Oleg Nesterov @ 2013-03-02 17:06 UTC (permalink / raw)
To: Michel Lespinasse
Cc: Lai Jiangshan, linux-doc, peterz, fweisbec, mingo, linux-arch,
linux, xiaoguangrong, wangyun, paulmck, nikunj, linux-pm, rusty,
rostedt, rjw, namhyung, tglx, linux-arm-kernel, Lai Jiangshan,
netdev, linux-kernel, vincent.guittot, sbw, Srivatsa S. Bhat, tj,
akpm, linuxppc-dev
In-Reply-To: <CANN689HEW=b5S93J27p+rBX-5m7jkW4FER=eHDCp7OgMaTWLPw@mail.gmail.com>
On 03/02, Michel Lespinasse wrote:
>
> My version would be slower if it needs to take the
> slow path in a reentrant way, but I'm not sure it matters either :)
I'd say, this doesn't matter at all, simply because this can only happen
if we race with the active writer.
Oleg.
^ permalink raw reply
* Re: [PATCH] lglock: add read-preference local-global rwlock
From: Oleg Nesterov @ 2013-03-02 17:01 UTC (permalink / raw)
To: Lai Jiangshan
Cc: Lai Jiangshan, linux-doc, peterz, fweisbec, Michel Lespinasse,
mingo, linux-arch, linux, xiaoguangrong, wangyun, paulmck, nikunj,
linux-pm, rusty, rostedt, rjw, namhyung, tglx, linux-arm-kernel,
netdev, linux-kernel, vincent.guittot, sbw, Srivatsa S. Bhat, tj,
akpm, linuxppc-dev
In-Reply-To: <513201B7.5070004@cn.fujitsu.com>
On 03/02, Lai Jiangshan wrote:
>
> On 02/03/13 02:28, Oleg Nesterov wrote:
> > Lai, I didn't read this discussion except the code posted by Michel.
> > I'll try to read this patch carefully later, but I'd like to ask
> > a couple of questions.
> >
> > This version looks more complex than Michel's, why? Just curious, I
> > am trying to understand what I missed. See
> > http://marc.info/?l=linux-kernel&m=136196350213593
>
> Michel changed my old draft version a little, his version is good enough for me.
Yes, I see. But imho Michel suggested the valuable cleanup, the code
becomes even more simple with the same perfomance.
Your v2 looks almost correct to me, but I still think it makes sense
to incorporate the simplification from Michel.
> My new version tries to add a little better nestable support with only
> adding single __this_cpu_op() in _read_[un]lock().
How? Afaics with or without FALLBACK_BASE you need _reed + _inc/dec in
_read_lock/unlock.
Oleg.
^ permalink raw reply
* Re: Linux kernel 3.x problems on PowerMac G5
From: Andreas Schwab @ 2013-03-02 16:22 UTC (permalink / raw)
To: Phileas Fogg; +Cc: linuxppc-dev, Aaro Koskinen
In-Reply-To: <5132198C.8050300__15885.293405927$1362234296$gmane$org@mail.ru>
Phileas Fogg <phileas-fogg@mail.ru> writes:
> Aaro Koskinen wrote:
>> Hi,
>>
>> On Sat, Mar 02, 2013 at 03:40:19PM +0100, Phileas Fogg wrote:
>>> Have anyone tested Linux 3 kernels on PowerMac G5 recently ?
>>
>> 3.8 boots normally to shell and is stable on G5 iMac (PowerMac8,1).
>>
>> A.
>>
>
> Thanks. Then i configured something wrongly probably.
> I tried Linux 2.6.39.4 and it boots too.
> I looked around on the Internet and it seems i'm not the only one
> who has problems with Linux 3.x on my PowerMac G5.
I have no problem with 3.8 either, but mine is a PowerMac7,3.
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
^ permalink raw reply
* Re: Linux kernel 3.x problems on PowerMac G5
From: Phileas Fogg @ 2013-03-02 15:23 UTC (permalink / raw)
To: Aaro Koskinen; +Cc: linuxppc-dev
In-Reply-To: <20130302141352.GG22941@blackmetal.musicnaut.iki.fi>
Aaro Koskinen wrote:
> Hi,
>
> On Sat, Mar 02, 2013 at 03:40:19PM +0100, Phileas Fogg wrote:
>> Have anyone tested Linux 3 kernels on PowerMac G5 recently ?
>
> 3.8 boots normally to shell and is stable on G5 iMac (PowerMac8,1).
>
> A.
>
Thanks. Then i configured something wrongly probably.
I tried Linux 2.6.39.4 and it boots too.
I looked around on the Internet and it seems i'm not the only one
who has problems with Linux 3.x on my PowerMac G5.
The guy here has the same problem:
http://forums.gentoo.org/viewtopic-p-7222918.html
My PowerMac CPU
--------------------
cat /proc/cpuinfo
processor : 0
cpu : PPC970MP, altivec supported
clock : 2000.000000MHz
revision : 1.0 (pvr 0044 0100)
processor : 1
cpu : PPC970MP, altivec supported
clock : 2000.000000MHz
revision : 1.0 (pvr 0044 0100)
timebase : 33333333
platform : PowerMac
model : PowerMac11,2
machine : PowerMac11,2
motherboard : PowerMac11,2 MacRISC4 Power Macintosh
detected as : 337 (PowerMac G5 Dual Core)
pmac flags : 00000000
L2 cache : 1024K unified
pmac-generation : NewWorld
^ permalink raw reply
* Re: Linux kernel 3.x problems on PowerMac G5
From: Aaro Koskinen @ 2013-03-02 14:13 UTC (permalink / raw)
To: Phileas Fogg; +Cc: linuxppc-dev
In-Reply-To: <51320F53.9040000@mail.ru>
Hi,
On Sat, Mar 02, 2013 at 03:40:19PM +0100, Phileas Fogg wrote:
> Have anyone tested Linux 3 kernels on PowerMac G5 recently ?
3.8 boots normally to shell and is stable on G5 iMac (PowerMac8,1).
A.
^ permalink raw reply
* [PATCH] powerpc: remove unused BITOP_LE_SWIZZLE macro
From: Akinobu Mita @ 2013-03-02 14:06 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Paul Mackerras, Akinobu Mita
The BITOP_LE_SWIZZLE macro was used in the little-endian bitops functions
for powerpc. But these functions were converted to generic bitops and
the BITOP_LE_SWIZZLE is not used anymore.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
---
arch/powerpc/include/asm/bitops.h | 2 --
1 file changed, 2 deletions(-)
diff --git a/arch/powerpc/include/asm/bitops.h b/arch/powerpc/include/asm/bitops.h
index ef918a2..08bd299 100644
--- a/arch/powerpc/include/asm/bitops.h
+++ b/arch/powerpc/include/asm/bitops.h
@@ -52,8 +52,6 @@
#define smp_mb__before_clear_bit() smp_mb()
#define smp_mb__after_clear_bit() smp_mb()
-#define BITOP_LE_SWIZZLE ((BITS_PER_LONG-1) & ~0x7)
-
/* Macro for generating the ***_bits() functions */
#define DEFINE_BITOP(fn, op, prefix, postfix) \
static __inline__ void fn(unsigned long mask, \
--
1.8.1.2
^ permalink raw reply related
* Linux kernel 3.x problems on PowerMac G5
From: Phileas Fogg @ 2013-03-02 14:40 UTC (permalink / raw)
To: linuxppc-dev
Hi,
recently i got a PowerMac G5 and installed Debian Linux 2.6.32 on it.
Everything works so far and Debian boots properly.
Today i tried to boot Linux 3 on the machine and it doesn't boot.
The Linux 3 kernel was cross-compiled by me.
On Linux 3.8.1 it hangs after this line:
---
windfarm: Drive bay control loop started.
And then i'm getting RCU stall call traces.
On Linux 3.2 it hangs too but not at the same place.
It hangs after some SCSI message.
Have anyone tested Linux 3 kernels on PowerMac G5 recently ?
Regards
^ permalink raw reply
* Re: [PATCH] lglock: add read-preference local-global rwlock
From: Lai Jiangshan @ 2013-03-02 13:42 UTC (permalink / raw)
To: Oleg Nesterov, paulmck
Cc: Lai Jiangshan, linux-doc, peterz, fweisbec, Michel Lespinasse,
mingo, linux-arch, linux, xiaoguangrong, wangyun, nikunj,
linux-pm, rusty, rostedt, rjw, namhyung, tglx, linux-arm-kernel,
netdev, linux-kernel, vincent.guittot, sbw, Srivatsa S. Bhat, tj,
akpm, linuxppc-dev
In-Reply-To: <20130301182854.GA3631@redhat.com>
On 02/03/13 02:28, Oleg Nesterov wrote:
> Lai, I didn't read this discussion except the code posted by Michel.
> I'll try to read this patch carefully later, but I'd like to ask
> a couple of questions.
>
> This version looks more complex than Michel's, why? Just curious, I
> am trying to understand what I missed. See
> http://marc.info/?l=linux-kernel&m=136196350213593
Michel changed my old draft version a little, his version is good enough for me.
My new version tries to add a little better nestable support with only
adding single __this_cpu_op() in _read_[un]lock().
>
> And I can't understand FALLBACK_BASE...
>
> OK, suppose that CPU_0 does _write_unlock() and releases ->fallback_rwlock.
>
> CPU_1 does _read_lock(), and ...
>
>> +void lg_rwlock_local_read_lock(struct lgrwlock *lgrw)
>> +{
>> + struct lglock *lg = &lgrw->lglock;
>> +
>> + preempt_disable();
>> + rwlock_acquire_read(&lg->lock_dep_map, 0, 0, _RET_IP_);
>> + if (likely(!__this_cpu_read(*lgrw->reader_refcnt))) {
>> + if (!arch_spin_trylock(this_cpu_ptr(lg->lock))) {
>
> _trylock() fails,
>
>> + read_lock(&lgrw->fallback_rwlock);
>> + __this_cpu_add(*lgrw->reader_refcnt, FALLBACK_BASE);
>
> so we take ->fallback_rwlock and ->reader_refcnt == FALLBACK_BASE.
>
> CPU_0 does lg_global_unlock(lgrw->lglock) and finishes _write_unlock().
>
> Interrupt handler on CPU_1 does _read_lock() notices ->reader_refcnt != 0
> and simply does this_cpu_inc(), so reader_refcnt == FALLBACK_BASE + 1.
>
> Then irq does _read_unlock(), and
>
>> +void lg_rwlock_local_read_unlock(struct lgrwlock *lgrw)
>> +{
>> + switch (__this_cpu_dec_return(*lgrw->reader_refcnt)) {
>> + case 0:
>> + lg_local_unlock(&lgrw->lglock);
>> + return;
>> + case FALLBACK_BASE:
>> + __this_cpu_sub(*lgrw->reader_refcnt, FALLBACK_BASE);
>> + read_unlock(&lgrw->fallback_rwlock);
>
> hits this case?
>
> Doesn't look right, but most probably I missed something.
Your are right, I just realized that I had spit a code which should be atomic.
I hope this patch(V2) can get more reviews.
My first and many locking knowledge is learned from Paul.
Paul, would you also review it?
Thanks,
Lai
>
> Oleg.
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
^ permalink raw reply
* [PATCH V2] lglock: add read-preference local-global rwlock
From: Lai Jiangshan @ 2013-03-02 13:14 UTC (permalink / raw)
To: Michel Lespinasse, Srivatsa S. Bhat
Cc: Lai Jiangshan, linux-doc, peterz, fweisbec, linux-kernel, mingo,
linux-arch, linux, xiaoguangrong, wangyun, paulmck, nikunj,
linux-pm, rusty, rostedt, rjw, namhyung, tglx, linux-arm-kernel,
netdev, Oleg Nesterov, vincent.guittot, sbw, tj, akpm,
linuxppc-dev
In-Reply-To: <CANN689HEW=b5S93J27p+rBX-5m7jkW4FER=eHDCp7OgMaTWLPw@mail.gmail.com>
>From 345a7a75c314ff567be48983e0892bc69c4452e7 Mon Sep 17 00:00:00 2001
From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Sat, 2 Mar 2013 20:33:14 +0800
Subject: [PATCH] lglock: add read-preference local-global rwlock
Current lglock is not read-preference, so it can't be used on some cases
which read-preference rwlock can do. Example, get_cpu_online_atomic().
Although we can use rwlock for these cases which needs read-preference.
but it leads to unnecessary cache-line bouncing even when there are no
writers present, which can slow down the system needlessly. It will be
worse when we have a lot of CPUs, it is not scale.
So we look forward to lglock. lglock is read-write-lock based on percpu locks,
but it is not read-preference due to its underlining percpu locks.
But what if we convert the percpu locks of lglock to use percpu rwlocks:
CPU 0 CPU 1
------ ------
1. spin_lock(&random_lock); read_lock(my_rwlock of CPU 1);
2. read_lock(my_rwlock of CPU 0); spin_lock(&random_lock);
Writer:
CPU 2:
------
for_each_online_cpu(cpu)
write_lock(my_rwlock of 'cpu');
Consider what happens if the writer begins his operation in between steps 1
and 2 at the reader side. It becomes evident that we end up in a (previously
non-existent) deadlock due to a circular locking dependency between the 3
entities, like this:
(holds Waiting for
random_lock) CPU 0 -------------> CPU 2 (holds my_rwlock of CPU 0
for write)
^ |
| |
Waiting| | Waiting
for | | for
| V
------ CPU 1 <------
(holds my_rwlock of
CPU 1 for read)
So obviously this "straight-forward" way of implementing percpu rwlocks is
deadlock-prone. So we can't implement read-preference local-global rwlock
like this.
The implement of this patch reuse current lglock as frontend to achieve
local-read-lock, and reuse global fallback rwlock as backend to achieve
read-preference, and use percpu reader counter to indicate 1) the depth
of the nested reader lockes and 2) whether the outmost lock is percpu lock
or fallback rwlock.
The algorithm is simple, in the read site:
If it is nested reader, just increase the counter
If it is the outmost reader,
1) try to lock its cpu's lock of the frontend lglock.
(reader count +=1 if success)
2) if the above step fails, read_lock(&fallback_rwlock).
(reader count += FALLBACK_BASE + 1)
Write site:
Do the lg_global_lock() of the frontend lglock.
And then write_lock(&fallback_rwlock).
Prof:
1) reader-writer exclusive:
write-site must requires all percpu locks and fallback_rwlock.
outmost read-site must requires one of these locks.
2) read-preference:
before write site lock finished acquired, read site at least
wins at read_lock(&fallback_rwlock) due to rwlock is read-preference.
3) read site functions are irqsafe(reentrance-safe)
(read site functions is not protected by disabled irq, but they are irqsafe)
If read site function is interrupted at any point and reenters read site
again, reentranced read site will not be mislead by the first read site if the
reader counter > 0, in this case, it means currently frontend(this cpu lock of
lglock) or backend(fallback rwlock) lock is held, it is safe to act as
nested reader.
if the reader counter=0, eentranced reader considers it is the
outmost read site, and it always successes after the write side release the lock.
(even the interrupted read-site has already hold the cpu lock of lglock
or the fallback_rwlock).
And reentranced read site only calls arch_spin_trylock(), read_lock()
and __this_cpu_op(), arch_spin_trylock(), read_lock() is already reentrance-safe.
Although __this_cpu_op() is not reentrance-safe, but the value of the counter
will be restored after the interrupted finished, so read site functions
are still reentrance-safe.
Performance:
We only focus on the performance of the read site. this read site's fast path
is just preempt_disable() + __this_cpu_read/inc() + arch_spin_trylock(),
It has only one heavy memory operation. it will be expected fast.
We test three locks.
1) traditional rwlock WITHOUT remote competition nor cache-bouncing.(opt-rwlock)
2) this lock(lgrwlock)
3) V6 percpu-rwlock by "Srivatsa S. Bhat". (percpu-rwlock)
(https://lkml.org/lkml/2013/2/18/186)
nested=1(no nested) nested=2 nested=4
opt-rwlock 517181 1009200 2010027
lgrwlock 452897 700026 1201415
percpu-rwlock 1192955 1451343 1951757
The value is the time(nano-second) of 10000 times of the operations
{
read-lock
[nested read-lock]...
[nested read-unlock]...
read-unlock
}
If the way of this test is wrong nor bad, please correct me,
the code of test is here: https://gist.github.com/laijs/5066159
(i5 760, 64bit)
Changed from V1
fix a reentrance-bug which is cought by Oleg
don't touch lockdep for nested reader(needed by below change)
add two special APIs for cpuhotplug.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
---
include/linux/lglock.h | 38 ++++++++++++++++++++++++++
kernel/lglock.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 106 insertions(+), 0 deletions(-)
diff --git a/include/linux/lglock.h b/include/linux/lglock.h
index 0d24e93..90bfe79 100644
--- a/include/linux/lglock.h
+++ b/include/linux/lglock.h
@@ -67,4 +67,42 @@ void lg_local_unlock_cpu(struct lglock *lg, int cpu);
void lg_global_lock(struct lglock *lg);
void lg_global_unlock(struct lglock *lg);
+/* read-preference read-write-lock like rwlock but provides local-read-lock */
+struct lgrwlock {
+ unsigned long __percpu *reader_refcnt;
+ struct lglock lglock;
+ rwlock_t fallback_rwlock;
+};
+
+#define __DEFINE_LGRWLOCK_PERCPU_DATA(name) \
+ static DEFINE_PER_CPU(arch_spinlock_t, name ## _lock) \
+ = __ARCH_SPIN_LOCK_UNLOCKED; \
+ static DEFINE_PER_CPU(unsigned long, name ## _refcnt);
+
+#define __LGRWLOCK_INIT(name) \
+ { \
+ .reader_refcnt = &name ## _refcnt, \
+ .lglock = { .lock = &name ## _lock }, \
+ .fallback_rwlock = __RW_LOCK_UNLOCKED(name.fallback_rwlock)\
+ }
+
+#define DEFINE_LGRWLOCK(name) \
+ __DEFINE_LGRWLOCK_PERCPU_DATA(name) \
+ struct lgrwlock name = __LGRWLOCK_INIT(name)
+
+#define DEFINE_STATIC_LGRWLOCK(name) \
+ __DEFINE_LGRWLOCK_PERCPU_DATA(name) \
+ static struct lgrwlock name = __LGRWLOCK_INIT(name)
+
+static inline void lg_rwlock_init(struct lgrwlock *lgrw, char *name)
+{
+ lg_lock_init(&lgrw->lglock, name);
+}
+
+void lg_rwlock_local_read_lock(struct lgrwlock *lgrw);
+void lg_rwlock_local_read_unlock(struct lgrwlock *lgrw);
+void lg_rwlock_global_write_lock(struct lgrwlock *lgrw);
+void lg_rwlock_global_write_unlock(struct lgrwlock *lgrw);
+void __lg_rwlock_global_read_write_lock(struct lgrwlock *lgrw);
+void __lg_rwlock_global_read_write_unlock(struct lgrwlock *lgrw);
#endif
diff --git a/kernel/lglock.c b/kernel/lglock.c
index 6535a66..52e9b2c 100644
--- a/kernel/lglock.c
+++ b/kernel/lglock.c
@@ -87,3 +87,71 @@ void lg_global_unlock(struct lglock *lg)
preempt_enable();
}
EXPORT_SYMBOL(lg_global_unlock);
+
+#define FALLBACK_BASE (1UL << 30)
+
+void lg_rwlock_local_read_lock(struct lgrwlock *lgrw)
+{
+ struct lglock *lg = &lgrw->lglock;
+
+ preempt_disable();
+ if (likely(!__this_cpu_read(*lgrw->reader_refcnt))) {
+ rwlock_acquire_read(&lg->lock_dep_map, 0, 0, _RET_IP_);
+ if (unlikely(!arch_spin_trylock(this_cpu_ptr(lg->lock)))) {
+ read_lock(&lgrw->fallback_rwlock);
+ __this_cpu_write(*lgrw->reader_refcnt, FALLBACK_BASE);
+ return;
+ }
+ }
+
+ __this_cpu_inc(*lgrw->reader_refcnt);
+}
+EXPORT_SYMBOL(lg_rwlock_local_read_lock);
+
+void lg_rwlock_local_read_unlock(struct lgrwlock *lgrw)
+{
+ switch (__this_cpu_read(*lgrw->reader_refcnt)) {
+ case 1:
+ __this_cpu_write(*lgrw->reader_refcnt, 0);
+ lg_local_unlock(&lgrw->lglock);
+ return;
+ case FALLBACK_BASE:
+ __this_cpu_write(*lgrw->reader_refcnt, 0);
+ read_unlock(&lgrw->fallback_rwlock);
+ rwlock_release(&lg->lock_dep_map, 1, _RET_IP_);
+ break;
+ default:
+ __this_cpu_dec(*lgrw->reader_refcnt);
+ break;
+ }
+
+ preempt_enable();
+}
+EXPORT_SYMBOL(lg_rwlock_local_read_unlock);
+
+void lg_rwlock_global_write_lock(struct lgrwlock *lgrw)
+{
+ lg_global_lock(&lgrw->lglock);
+ write_lock(&lgrw->fallback_rwlock);
+}
+EXPORT_SYMBOL(lg_rwlock_global_write_lock);
+
+void lg_rwlock_global_write_unlock(struct lgrwlock *lgrw)
+{
+ write_unlock(&lgrw->fallback_rwlock);
+ lg_global_unlock(&lgrw->lglock);
+}
+EXPORT_SYMBOL(lg_rwlock_global_write_unlock);
+
+/* special write-site APIs allolw nested reader in such write-site */
+void __lg_rwlock_global_read_write_lock(struct lgrwlock *lgrw)
+{
+ lg_rwlock_global_write_lock(lgrw);
+ __this_cpu_write(*lgrw->reader_refcnt, 1);
+}
+
+void __lg_rwlock_global_read_write_unlock(struct lgrwlock *lgrw)
+{
+ __this_cpu_write(*lgrw->reader_refcnt, 0);
+ lg_rwlock_global_write_unlock(lgrw);
+}
--
1.7.7.6
^ permalink raw reply related
* Re: [PATCH] lglock: add read-preference local-global rwlock
From: Michel Lespinasse @ 2013-03-02 12:13 UTC (permalink / raw)
To: Oleg Nesterov
Cc: Lai Jiangshan, linux-doc, peterz, fweisbec, mingo, linux-arch,
linux, xiaoguangrong, wangyun, paulmck, nikunj, linux-pm, rusty,
rostedt, rjw, namhyung, tglx, linux-arm-kernel, Lai Jiangshan,
netdev, linux-kernel, vincent.guittot, sbw, Srivatsa S. Bhat, tj,
akpm, linuxppc-dev
In-Reply-To: <20130301182854.GA3631@redhat.com>
On Sat, Mar 2, 2013 at 2:28 AM, Oleg Nesterov <oleg@redhat.com> wrote:
> Lai, I didn't read this discussion except the code posted by Michel.
> I'll try to read this patch carefully later, but I'd like to ask
> a couple of questions.
>
> This version looks more complex than Michel's, why? Just curious, I
> am trying to understand what I missed. See
> http://marc.info/?l=linux-kernel&m=136196350213593
>From what I can see, my version used local_refcnt to count how many
reentrant locks are represented by the fastpath lglock spinlock; Lai's
version uses it to count how many reentrant locks are represented by
either the fastpath lglock spinlock or the global rwlock, with
FALLBACK_BASE being a bit thrown in so we can remember which of these
locks was acquired. My version would be slower if it needs to take the
slow path in a reentrant way, but I'm not sure it matters either :)
> Interrupt handler on CPU_1 does _read_lock() notices ->reader_refcnt != 0
> and simply does this_cpu_inc(), so reader_refcnt == FALLBACK_BASE + 1.
>
> Then irq does _read_unlock(), and
>
>> +void lg_rwlock_local_read_unlock(struct lgrwlock *lgrw)
>> +{
>> + switch (__this_cpu_dec_return(*lgrw->reader_refcnt)) {
>> + case 0:
>> + lg_local_unlock(&lgrw->lglock);
>> + return;
>> + case FALLBACK_BASE:
>> + __this_cpu_sub(*lgrw->reader_refcnt, FALLBACK_BASE);
>> + read_unlock(&lgrw->fallback_rwlock);
>
> hits this case?
>
> Doesn't look right, but most probably I missed something.
Good catch. I think this is easily fixed by setting reader_refcn
directly to FALLBACK_BASE+1, instead of setting it to FALLBACK_BASE
and then incrementing it to FALLBACK_BASE+1.
--
Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.
^ permalink raw reply
* Re: [PATCH 6/6 v8] iommu/fsl: Freescale PAMU driver and IOMMU API implementation.
From: Stuart Yoder @ 2013-03-01 23:27 UTC (permalink / raw)
To: Varun Sethi
Cc: Joerg Roedel, Stuart Yoder, linux-kernel, iommu, Scott Wood,
linuxppc-dev
In-Reply-To: <1361191939-21260-7-git-send-email-Varun.Sethi@freescale.com>
On Mon, Feb 18, 2013 at 6:52 AM, Varun Sethi <Varun.Sethi@freescale.com> wrote:
[cut]
> +static phys_addr_t get_phys_addr(struct fsl_dma_domain *dma_domain, unsigned long iova)
> +{
> + u32 win_cnt = dma_domain->win_cnt;
> + struct dma_window *win_ptr =
> + &dma_domain->win_arr[0];
> + struct iommu_domain_geometry *geom;
> +
> + geom = &dma_domain->iommu_domain->geometry;
> +
> + if (!win_cnt || !dma_domain->geom_size) {
> + pr_err("Number of windows/geometry not configured for the domain\n");
> + return 0;
> + }
> +
> + if (win_cnt > 1) {
> + u64 subwin_size;
> + unsigned long subwin_iova;
> + u32 wnd;
> +
> + subwin_size = dma_domain->geom_size >> ilog2(win_cnt);
Could it be just geom_size / win_cnt ??
> + subwin_iova = iova & ~(subwin_size - 1);
> + wnd = (subwin_iova - geom->aperture_start) >> ilog2(subwin_size);
> + win_ptr = &dma_domain->win_arr[wnd];
> + }
> +
> + if (win_ptr->valid)
> + return (win_ptr->paddr + (iova & (win_ptr->size - 1)));
> +
> + return 0;
> +}
> +
> +static int map_liodn_subwins(int liodn, struct fsl_dma_domain *dma_domain)
Just call it map_subwins(). They are just sub windows, not "liodn sub windows".
[cut]
> +static int map_liodn_win(int liodn, struct fsl_dma_domain *dma_domain)
Call it map_win().
[cut]
> +static struct fsl_dma_domain *iommu_alloc_dma_domain(void)
> +{
> + struct fsl_dma_domain *domain;
> +
> + domain = kmem_cache_zalloc(fsl_pamu_domain_cache, GFP_KERNEL);
> + if (!domain)
> + return NULL;
> +
> + domain->stash_id = ~(u32)0;
> + domain->snoop_id = ~(u32)0;
> + domain->win_cnt = max_subwindow_count;
To align with my previous comments on fsl_pamu.c, I think instead of referencing
a global variable (in fsl_pamu.c) you should be making an accessor API
call here to get
the max subwindow _count.
> + domain->geom_size = 0;
> +
> + INIT_LIST_HEAD(&domain->devices);
> +
> + spin_lock_init(&domain->domain_lock);
> +
> + return domain;
> +}
> +
> +static inline struct device_domain_info *find_domain(struct device *dev)
> +{
> + return dev->archdata.iommu_domain;
> +}
> +
> +static void remove_domain_ref(struct device_domain_info *info, u32 win_cnt)
> +{
> + list_del(&info->link);
> + spin_lock(&iommu_lock);
> + if (win_cnt)
> + pamu_free_subwins(info->liodn);
> + pamu_disable_liodn(info->liodn);
> + spin_unlock(&iommu_lock);
> + spin_lock(&device_domain_lock);
> + info->dev->archdata.iommu_domain = NULL;
> + kmem_cache_free(iommu_devinfo_cache, info);
> + spin_unlock(&device_domain_lock);
> +}
The above function is literally removing the _device_ reference from the domain.
The name implies that it is removing a "domain reference". Suggestion is
to call it "remove_device_ref".
Also, the whitespace is messed up there. You have 2 tabs instead of 1.
> +static void destroy_domain(struct fsl_dma_domain *dma_domain)
> +{
> + struct device_domain_info *info;
> +
> + /* Dissociate all the devices from this domain */
> + while (!list_empty(&dma_domain->devices)) {
> + info = list_entry(dma_domain->devices.next,
> + struct device_domain_info, link);
> + remove_domain_ref(info, dma_domain->win_cnt);
> + }
> +}
This function is removing all devices from a domain...maybe to be
consistent with my
suggestion below on detach_domain(), call this detach_all_devices().
We have 2 functions
doing almost the same thing....one detaches a single device, one
detaches all devices.
The current names "destroy_domain" and "detach_domain" are not as clear to me.
> +static void detach_domain(struct device *dev, struct fsl_dma_domain *dma_domain)
> +{
> + struct device_domain_info *info;
> + struct list_head *entry, *tmp;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&dma_domain->domain_lock, flags);
> + /* Remove the device from the domain device list */
> + if (!list_empty(&dma_domain->devices)) {
> + list_for_each_safe(entry, tmp, &dma_domain->devices) {
> + info = list_entry(entry, struct device_domain_info, link);
> + if (info->dev == dev)
> + remove_domain_ref(info, dma_domain->win_cnt);
> + }
> + }
> + spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
> +}
This function is not "detaching a domain", but is detaching a device.
Call it detach_device().
> +static void attach_domain(struct fsl_dma_domain *dma_domain, int liodn, struct device *dev)
> +{
Same thing here. This is not attaching a domain, but attaching a
device. Call it attach_device.
> + struct device_domain_info *info, *old_domain_info;
> +
> + spin_lock(&device_domain_lock);
> + /*
> + * Check here if the device is already attached to domain or not.
> + * If the device is already attached to a domain detach it.
> + */
> + old_domain_info = find_domain(dev);
> + if (old_domain_info && old_domain_info->domain != dma_domain) {
> + spin_unlock(&device_domain_lock);
> + detach_domain(dev, old_domain_info->domain);
> + spin_lock(&device_domain_lock);
> + }
> +
> + info = kmem_cache_zalloc(iommu_devinfo_cache, GFP_KERNEL);
> +
> + info->dev = dev;
> + info->liodn = liodn;
> + info->domain = dma_domain;
> +
> + list_add(&info->link, &dma_domain->devices);
> + /*
> + * In case of devices with multiple LIODNs just store
> + * the info for the first LIODN as all
> + * LIODNs share the same domain
> + */
> + if (!old_domain_info)
> + dev->archdata.iommu_domain = info;
> + spin_unlock(&device_domain_lock);
> +
> +}
> +
[cut]
> +/* Configure geometry settings for all LIODNs associated with domain */
> +static int configure_domain(struct fsl_dma_domain *dma_domain,
> + struct iommu_domain_geometry *geom_attr,
> + u32 win_cnt)
This function is not configuring the iommu domain...which is a concept
in the Linux driver, it is taking the domain geometry and setting
up the PAMU tables for all LIODNs currently in the domain.
Maybe it would help if you used a prefix like "pamu" or "paact" to
identify functions that operate on the actual PAMU tables.
maybe: pamu_set_domain_geometry()
> +{
> + struct device_domain_info *info;
> + int ret = 0;
> +
> + if (!list_empty(&dma_domain->devices)) {
> + list_for_each_entry(info, &dma_domain->devices, link) {
> + ret = configure_liodn(info->liodn, info->dev, dma_domain,
> + geom_attr, win_cnt);
...and following the above naming convention, call this (?): pamu_set_liodn
> + if (ret)
> + break;
> + }
> + }
> +
> + return ret;
> +}
> +
[cut]
> +static int fsl_pamu_window_enable(struct iommu_domain *domain, u32 wnd_nr,
> + phys_addr_t paddr, u64 size, int iommu_prot)
> +{
> + struct fsl_dma_domain *dma_domain = domain->priv;
> + struct dma_window *wnd;
> + int prot = 0;
> + int ret;
> + unsigned long flags;
> + u64 win_size;
> +
> + if (iommu_prot & IOMMU_READ)
> + prot |= PAACE_AP_PERMS_QUERY;
> + if (iommu_prot & IOMMU_WRITE)
> + prot |= PAACE_AP_PERMS_UPDATE;
> +
> + spin_lock_irqsave(&dma_domain->domain_lock, flags);
> + if (!dma_domain->win_arr) {
> + pr_err("Number of windows not configured\n");
> + spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
> + return -ENODEV;
> + }
> +
> + if (wnd_nr >= dma_domain->win_cnt) {
> + pr_err("Invalid window index\n");
> + spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
> + return -EINVAL;
> + }
> +
> + win_size = dma_domain->geom_size >> ilog2(dma_domain->win_cnt);
Isn't size just geom_size / win_cnt. Not sure why you do the ilog2()
and right shift...
We already validated that win_cnt is power of 2 when it was set.
> + if (size > win_size) {
> + pr_err("Invalid window size \n");
> + spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
> + return -EINVAL;
> + }
> +
> + if (dma_domain->win_cnt == 1) {
> + if (dma_domain->enabled) {
> + pr_err("Disable the window before updating the mapping\n");
> + spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
> + return -EBUSY;
> + }
> +
> + ret = check_size(size, domain->geometry.aperture_start);
> + if (ret) {
> + pr_err("Aperture start not aligned to the size\n");
> + spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
> + return -EINVAL;
> + }
> + }
Why is win_cnt==1 a special case? Would the geometry not have been verified
when it was originally set up?
Also, do you need a check here to verify if the geometry has been set. Is it a
requirement to set the geometry prior to window enable?
> + wnd = &dma_domain->win_arr[wnd_nr];
> + if (!wnd->valid) {
> + wnd->paddr = paddr;
> + wnd->size = size;
> + wnd->prot = prot;
> +
> + ret = update_domain_mapping(dma_domain, wnd_nr);
> + if (!ret) {
> + wnd->valid = 1;
> + dma_domain->mapped++;
> + }
> + } else {
> + pr_err("Disable the window before updating the mapping\n");
> + ret = -EBUSY;
> + }
> +
> + spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
> +
> + return ret;
> +}
> +
> +/*
[cut]
> +static int fsl_pamu_attach_device(struct iommu_domain *domain,
> + struct device *dev)
> +{
> + struct fsl_dma_domain *dma_domain = domain->priv;
> + const u32 *prop;
> + u32 prop_cnt;
> + int len, ret = 0;
> + struct pci_dev *pdev = NULL;
> + struct pci_controller *pci_ctl;
> +
> + /*
> + * Hack to make attach device work for the PCI devices. Simply assign the
> + * the LIODN for the PCI controller to the PCI device.
> + */
Instead of "Simply assign...", perhaps say instead: Use the LIODN for the
PCI controller when attaching a PCI device.
> + if (dev->bus == &pci_bus_type) {
> + pdev = to_pci_dev(dev);
> + pci_ctl = pci_bus_to_host(pdev->bus);
> + /*
> + * make dev point to pci controller device
> + * so we can get the LIODN programmed by
> + * u-boot;
> + */
> + dev = pci_ctl->parent;
> + }
> +
> + prop = of_get_property(dev->of_node, "fsl,liodn", &len);
suggestion: name "prop" to be "liodn" and "prop_cnt" to be "liodn_cnt". That
will be more clear.
> + if (prop) {
> + prop_cnt = len / sizeof(u32);
> + ret = handle_attach_device(dma_domain, dev,
> + prop, prop_cnt);
> + } else {
> + pr_err("missing fsl,liodn property at %s\n",
> + dev->of_node->full_name);
> + ret = -EINVAL;
> + }
> +
> + return ret;
> +}
> +
> +static void fsl_pamu_detach_device(struct iommu_domain *domain,
> + struct device *dev)
> +{
> + struct fsl_dma_domain *dma_domain = domain->priv;
> + const u32 *prop;
> + int len;
> + struct pci_dev *pdev = NULL;
> + struct pci_controller *pci_ctl;
> +
> + /*
> + * Hack to make detach device work for the PCI devices. Simply assign the
> + * the LIODN for the PCI controller to the PCI device.
> + */
> + if (dev->bus == &pci_bus_type) {
> + pdev = to_pci_dev(dev);
> + pci_ctl = pci_bus_to_host(pdev->bus);
> + /*
> + * make dev point to pci controller device
> + * so we can get the LIODN programmed by
> + * u-boot;
> + */
> + dev = pci_ctl->parent;
> + }
> +
> + prop = of_get_property(dev->of_node, "fsl,liodn", &len);
> + if (prop)
> + detach_domain(dev, dma_domain);
> + else
> + pr_err("missing fsl,liodn property at %s\n",
> + dev->of_node->full_name);
> +}
I understand why you need the LIODN when attaching, but why do you get it
in the detatch function. You are not using "prop" here.
[cut]
> +static bool check_pci_ctl_endpt_part(struct pci_controller *pci_ctl)
> +{
> + u32 version;
> +
> + /* Check the PCI controller version number by readding BRR1 register */
> + version = in_be32(pci_ctl->cfg_addr + (PCI_FSL_BRR1 >> 2));
> + version &= PCI_FSL_BRR1_VER;
> + /* If PCI controller version is >= 0x204 we can partition endpoints*/
> + if (version >= 0x204)
> + return 1;
> +
> + return 0;
> +}
Can we just use the compatible string here to identify the different
kinds of PCI
controllers? Reading the actual device registers is ugly right now because
you are #defining the BRR1 stuff in a generic powerpc header.
> +static int fsl_pamu_add_device(struct device *dev)
> +{
> + struct iommu_group *group = NULL;
> + struct pci_dev *pdev;
> + struct pci_dev *bridge, *dma_pdev = NULL;
> + struct pci_controller *pci_ctl;
> + int ret;
> +
> + /*
> + * For platform devices we allocate a separate group for
> + * each of the devices.
> + */
> + if (dev->bus == &pci_bus_type) {
> + bool pci_endpt_part;
That variable name is not clear, the abbreviations are not natural. I
would just
call it pci_endpoint_partitioning.
> + pdev = to_pci_dev(dev);
> + /* Don't create device groups for virtual PCI bridges */
> + if (pdev->subordinate)
> + return 0;
> +
> + pci_ctl = pci_bus_to_host(pdev->bus);
> + pci_endpt_part = check_pci_ctl_endpt_part(pci_ctl);
> + /* We can partition PCIe devices so assign device group to the device */
> + if (pci_endpt_part) {
> + bridge = pci_find_upstream_pcie_bridge(pdev);
> + if (bridge) {
> + if (pci_is_pcie(bridge))
> + dma_pdev = pci_get_domain_bus_and_slot(
> + pci_domain_nr(pdev->bus),
> + bridge->subordinate->number, 0);
> + if (!dma_pdev)
> + dma_pdev = pci_dev_get(bridge);
> + } else
> + dma_pdev = pci_dev_get(pdev);
> + /* Account for quirked devices */
> + swap_pci_ref(&dma_pdev, pci_get_dma_source(dma_pdev));
> + group = get_device_iommu_group(&pdev->dev);
> + pci_dev_put(pdev);
> + /*
> + * PCIe controller is not a paritionable entity
> + * free the controller device iommu_group.
> + */
> + if (pci_ctl->parent->iommu_group)
> + iommu_group_remove_device(pci_ctl->parent);
> + } else {
> + /*
> + * All devices connected to the controller will share the
> + * PCI controllers device group. If this is the first
> + * device to be probed for the pci controller, copy the
> + * device group information from the PCI controller device
> + * node and remove the PCI controller iommu group.
> + * For subsequent devices, the iommu group information can
> + * be obtained from sibling devices (i.e. from the bus_devices
> + * link list).
> + */
> + if (pci_ctl->parent->iommu_group) {
> + group = get_device_iommu_group(pci_ctl->parent);
> + iommu_group_remove_device(pci_ctl->parent);
> + } else {
> + /* check if this is the first device on the bus*/
> + if (pdev->bus_list.next == pdev->bus_list.prev) {
> + struct pci_bus *bus = pdev->bus->parent;
> + int found = 0;
> + /* Traverese the parent bus list to get
> + * pdev & dev for the sibling device.
> + */
> + while (bus) {
> + if (!list_empty(&bus->devices)) {
> + pdev = container_of(bus->devices.next,
> + struct pci_dev, bus_list);
> + group = iommu_group_get(&pdev->dev);
> + /*
> + * All devices should be associated with
> + * a group.
> + */
> + if (group)
> + found = 1;
> + break;
> + } else
> + bus = bus->parent;
> + }
> + if (!found)
> + dev_err(&pdev->dev, "Failed to allocate group for the device\n");
> + } else {
> + /*
> + * Get the pdev & dev for the sibling device
> + */
> + pdev = container_of(pdev->bus_list.prev, struct pci_dev, bus_list);
> + group = iommu_group_get(&pdev->dev);
> + }
> + }
> + }
> + } else
> + group = get_device_iommu_group(dev);
> +
> + if (IS_ERR(group))
> + return PTR_ERR(group);
> +
> + ret = iommu_group_add_device(group, dev);
> +
> + iommu_group_put(group);
> + return ret;
> +}
> +
Regards,
Stuart
^ permalink raw reply
* Re: [PATCH] lglock: add read-preference local-global rwlock
From: Srivatsa S. Bhat @ 2013-03-01 20:06 UTC (permalink / raw)
To: Tejun Heo
Cc: Lai Jiangshan, linux-doc, peterz, fweisbec, oleg,
Michel Lespinasse, mingo, linux-arch, linux, xiaoguangrong,
wangyun, paulmck, nikunj, linux-pm, rusty, rostedt, rjw, namhyung,
tglx, linux-arm-kernel, Lai Jiangshan, netdev, linux-kernel,
vincent.guittot, sbw, akpm, linuxppc-dev
In-Reply-To: <20130301175349.GC2481@mtj.dyndns.org>
On 03/01/2013 11:23 PM, Tejun Heo wrote:
> Hey, guys and Oleg (yes, I'm singling you out ;p because you're that
> awesome.)
>
> On Sat, Mar 02, 2013 at 01:44:02AM +0800, Lai Jiangshan wrote:
>> Performance:
>> We only focus on the performance of the read site. this read site's fast path
>> is just preempt_disable() + __this_cpu_read/inc() + arch_spin_trylock(),
>> It has only one heavy memory operation. it will be expected fast.
>>
>> We test three locks.
>> 1) traditional rwlock WITHOUT remote competition nor cache-bouncing.(opt-rwlock)
>> 2) this lock(lgrwlock)
>> 3) V6 percpu-rwlock by "Srivatsa S. Bhat". (percpu-rwlock)
>> (https://lkml.org/lkml/2013/2/18/186)
>>
>> nested=1(no nested) nested=2 nested=4
>> opt-rwlock 517181 1009200 2010027
>> lgrwlock 452897 700026 1201415
>> percpu-rwlock 1192955 1451343 1951757
>
> On the first glance, the numbers look pretty good and I kinda really
> like the fact that if this works out we don't have to introduce yet
> another percpu synchronization construct and get to reuse lglock.
>
> So, Oleg, can you please see whether you can find holes in this one?
>
> Srivatsa, I know you spent a lot of time on percpu_rwlock but as you
> wrote before Lai's work can be seen as continuation of yours, and if
> we get to extend what's already there instead of introducing something
> completely new, there's no reason not to
Yep, I agree!
> (and my apologies for not
> noticing the possibility of extending lglock before).
No problem at all! You gave so many invaluable suggestions to make this
whole thing work in the first place! Now, if we can reuse the existing
stuff and extend it to what we want, then its just even better! :-)
> So, if this can
> work, it would be awesome if you guys can work together.
Absolutely!
> Lai might
> not be very good at communicating in english yet but he's really good
> at spotting patterns in complex code and playing with them.
>
That sounds great! :-)
I'll soon take a closer look at his code and the comparisons he posted,
and work towards taking this effort forward.
Thank you very much!
Regards,
Srivatsa S. Bhat
^ permalink raw reply
* Re: [PATCH v6 04/46] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks
From: Srivatsa S. Bhat @ 2013-03-01 19:59 UTC (permalink / raw)
To: Tejun Heo
Cc: Lai Jiangshan, linux-doc, peterz, fweisbec, oleg,
Michel Lespinasse, mingo, linux-arch, linux, xiaoguangrong,
wangyun, paulmck, nikunj, linux-pm, rusty, rostedt, rjw, namhyung,
tglx, linux-arm-kernel, netdev, linux-kernel, vincent.guittot,
sbw, akpm, linuxppc-dev
In-Reply-To: <20130301181054.GD2481@mtj.dyndns.org>
Hi Tejun,
On 03/01/2013 11:40 PM, Tejun Heo wrote:
> Hello, Srivatsa.
>
> On Thu, Feb 28, 2013 at 02:49:53AM +0530, Srivatsa S. Bhat wrote:
>> Don't get me wrong - I'll whole-heartedly acknowledge and appreciate if
>> _your_ code is better than mine. I just don't like the idea of somebody
>> plagiarizing my ideas/code (or even others' ideas for that matter).
>> However, I sincerely apologize in advance if I misunderstood/misjudged your
>> intentions; I just wanted to voice my concerns out loud at this point,
>> considering the bad feeling I got by looking at your responses collectively.
>
> Although I don't know Lai personally, from my experience working with
> him past several months on workqueue, I strongly doubt he has dark
> urterior intenions. The biggest problem probably is that his
> communication in English isn't very fluent yet and thus doesn't carry
> the underlying intentions or tones very well and he tends to bombard
> patches in quick succession without much explanation inbetween (during
> 3.8 cycle, I was receiving several workqueue patchsets days apart
> trying to solve the same problem with completely different approaches
> way before the discussion on the previous postings reach any kind of
> consensus). A lot of that also probably comes from communication
> problems.
>
> Anyways, I really don't think he's trying to take claim of your work.
> At least for now, you kinda need to speculate what he's trying to do
> and then confirm that back to him, but once you get used to that part,
> he's pretty nice to work with and I'm sure his communication will
> improve in time (I think it has gotten a lot better than only some
> months ago).
>
Thank you so much for helping clear the air, Tejun! I'm truly sorry again
for having drawn the wrong conclusions based on gaps in our communication.
It was a mistake on my part and I would like to request Lai to kindly
forgive me. I'm looking forward to working with Lai effectively, going
forward.
Thank you!
Regards,
Srivatsa S. Bhat
^ permalink raw reply
* Re: [PATCH v6 04/46] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks
From: Srivatsa S. Bhat @ 2013-03-01 19:47 UTC (permalink / raw)
To: Lai Jiangshan
Cc: Lai Jiangshan, linux-doc, peterz, fweisbec, oleg,
Michel Lespinasse, mingo, linux-arch, linux, xiaoguangrong,
wangyun, paulmck, nikunj, linux-pm, rusty, rostedt, rjw, namhyung,
tglx, linux-arm-kernel, netdev, linux-kernel, vincent.guittot,
sbw, tj, akpm, linuxppc-dev
In-Reply-To: <5130EA6B.6030901@cn.fujitsu.com>
On 03/01/2013 11:20 PM, Lai Jiangshan wrote:
> On 28/02/13 05:19, Srivatsa S. Bhat wrote:
>> On 02/27/2013 06:03 AM, Lai Jiangshan wrote:
>>> On Wed, Feb 27, 2013 at 3:30 AM, Srivatsa S. Bhat
>>> <srivatsa.bhat@linux.vnet.ibm.com> wrote:
>>>> On 02/26/2013 09:55 PM, Lai Jiangshan wrote:
>>>>> On Tue, Feb 26, 2013 at 10:22 PM, Srivatsa S. Bhat
>>>>> <srivatsa.bhat@linux.vnet.ibm.com> wrote:
>>>>>>
>>>>>> Hi Lai,
>>>>>>
>>>>>> I'm really not convinced that piggy-backing on lglocks would help
>>>>>> us in any way. But still, let me try to address some of the points
>>>>>> you raised...
>>>>>>
>>>>>> On 02/26/2013 06:29 PM, Lai Jiangshan wrote:
>>>>>>> On Tue, Feb 26, 2013 at 5:02 PM, Srivatsa S. Bhat
>>>>>>> <srivatsa.bhat@linux.vnet.ibm.com> wrote:
>>>>>>>> On 02/26/2013 05:47 AM, Lai Jiangshan wrote:
>>>>>>>>> On Tue, Feb 26, 2013 at 3:26 AM, Srivatsa S. Bhat
>>>>>>>>> <srivatsa.bhat@linux.vnet.ibm.com> wrote:
>>>>>>>>>> Hi Lai,
>>>>>>>>>>
>>>>>>>>>> On 02/25/2013 09:23 PM, Lai Jiangshan wrote:
>>>>>>>>>>> Hi, Srivatsa,
>>>>>>>>>>>
>>>>>>>>>>> The target of the whole patchset is nice for me.
>>>>>>>>>>
>>>>>>>>>> Cool! Thanks :-)
>>>>>>>>>>
>>>>>>>> [...]
>>>>>>>>
>>>>>>>> Unfortunately, I see quite a few issues with the code above. IIUC, the
>>>>>>>> writer and the reader both increment the same counters. So how will the
>>>>>>>> unlock() code in the reader path know when to unlock which of the locks?
>>>>>>>
>>>>>>> The same as your code, the reader(which nested in write C.S.) just dec
>>>>>>> the counters.
>>>>>>
>>>>>> And that works fine in my case because the writer and the reader update
>>>>>> _two_ _different_ counters.
>>>>>
>>>>> I can't find any magic in your code, they are the same counter.
>>>>>
>>>>> /*
>>>>> * It is desirable to allow the writer to acquire the percpu-rwlock
>>>>> * for read (if necessary), without deadlocking or getting complaints
>>>>> * from lockdep. To achieve that, just increment the reader_refcnt of
>>>>> * this CPU - that way, any attempt by the writer to acquire the
>>>>> * percpu-rwlock for read, will get treated as a case of nested percpu
>>>>> * reader, which is safe, from a locking perspective.
>>>>> */
>>>>> this_cpu_inc(pcpu_rwlock->rw_state->reader_refcnt);
>>>>>
>>>>
>>>> Whoa! Hold on, were you really referring to _this_ increment when you said
>>>> that, in your patch you would increment the refcnt at the writer? Then I guess
>>>> there is a major disconnect in our conversations. (I had assumed that you were
>>>> referring to the update of writer_signal, and were just trying to have a single
>>>> refcnt instead of reader_refcnt and writer_signal).
>>>
>>> https://github.com/laijs/linux/commit/53e5053d5b724bea7c538b11743d0f420d98f38d
>>>
>>> Sorry the name "fallback_reader_refcnt" misled you.
>>>
>> [...]
>>
>>>>> All I was considered is "nested reader is seldom", so I always
>>>>> fallback to rwlock when nested.
>>>>> If you like, I can add 6 lines of code, the overhead is
>>>>> 1 spin_try_lock()(fast path) + N __this_cpu_inc()
>>>>>
>>>>
>>>> I'm assuming that calculation is no longer valid, considering that
>>>> we just discussed how the per-cpu refcnt that you were using is quite
>>>> unnecessary and can be removed.
>>>>
>>>> IIUC, the overhead with your code, as per above discussion would be:
>>>> 1 spin_try_lock() [non-nested] + N read_lock(global_rwlock).
>>>
>>> https://github.com/laijs/linux/commit/46334544bb7961550b7065e015da76f6dab21f16
>>>
>>> Again, I'm so sorry the name "fallback_reader_refcnt" misled you.
>>>
>>
>> At this juncture I really have to admit that I don't understand your
>> intentions at all. What are you really trying to prove? Without giving
>> a single good reason why my code is inferior, why are you even bringing
>> up the discussion about a complete rewrite of the synchronization code?
>> http://article.gmane.org/gmane.linux.kernel.cross-arch/17103
>> http://article.gmane.org/gmane.linux.power-management.general/31345
>>
>> I'm beginning to add 2 + 2 together based on the kinds of questions you
>> have been asking...
>>
>> You posted a patch in this thread and started a discussion around it without
>> even establishing a strong reason to do so. Now you point me to your git
>> tree where your patches have even more traces of ideas being borrowed from
>> my patchset (apart from my own ideas/code, there are traces of others' ideas
>> being borrowed too - for example, it was Oleg who originally proposed the
>> idea of splitting up the counter into 2 parts and I'm seeing that it is
>> slowly crawling into your code with no sign of appropriate credits).
>> http://article.gmane.org/gmane.linux.network/260288
>>
>> And in reply to my mail pointing out the performance implications of the
>> global read_lock at the reader side in your code, you said you'll come up
>> with a comparison between that and my patchset.
>> http://article.gmane.org/gmane.linux.network/260288
>> The issue has been well-documented in my patch description of patch 4.
>> http://article.gmane.org/gmane.linux.kernel/1443258
>>
>> Are you really trying to pit bits and pieces of my own ideas/versions
>> against one another and claiming them as your own?
>>
>> You projected the work involved in handling the locking issues pertaining
>> to CPU_DYING notifiers etc as a TODO, despite the fact that I had explicitly
>> noted in my cover letter that I had audited and taken care of all of them.
>> http://article.gmane.org/gmane.linux.documentation/9727
>> http://article.gmane.org/gmane.linux.documentation/9520
>>
>> You failed to acknowledge (on purpose?) that I had done a tree-wide
>> conversion despite the fact that you were replying to the very thread which
>> had the 46 patches which did exactly that (and I had also mentioned it
>> explicitly in my cover letter).
>> http://article.gmane.org/gmane.linux.documentation/9727
>> http://article.gmane.org/gmane.linux.documentation/9520
>>
>> You then started probing more and more about the technique I used to do
>> the tree-wide conversion.
>> http://article.gmane.org/gmane.linux.kernel.cross-arch/17111
>>
>> You also retorted saying you did go through my patch descriptions, so
>> its not like you have missed reading them.
>> http://article.gmane.org/gmane.linux.power-management.general/31345
>>
>> Each of these when considered individually, might appear like innocuous and
>> honest attempts at evaluating my code. But when put together, I'm beginning
>> to sense a whole different angle to it altogether, as if you are trying
>> to spin your own patch series, complete with the locking framework _and_
>> the tree-wide conversion, heavily borrowed from mine. At the beginning of
>> this discussion, I predicted that the lglock version that you are proposing
>> would end up being either less efficient than my version or look very similar
>> to my version. http://article.gmane.org/gmane.linux.kernel/1447139
>>
>> I thought it was just the former till now, but its not hard to see how it
>> is getting closer to becoming the latter too. So yeah, I'm not amused.
>>
>> Maybe (and hopefully) you are just trying out different ideas on your own,
>> and I'm just being paranoid. I really hope that is the case. If you are just
>> trying to review my code, then please stop sending patches with borrowed ideas
>> with your sole Signed-off-by, and purposefully ignoring the work already done
>> in my patchset, because it is really starting to look suspicious, at least
>> to me.
>>
>> Don't get me wrong - I'll whole-heartedly acknowledge and appreciate if
>> _your_ code is better than mine. I just don't like the idea of somebody
>> plagiarizing my ideas/code (or even others' ideas for that matter).
>> However, I sincerely apologize in advance if I misunderstood/misjudged your
>> intentions; I just wanted to voice my concerns out loud at this point,
>> considering the bad feeling I got by looking at your responses collectively.
>>
>
> Hi, Srivatsa
>
> I'm sorry, big apology to you.
> I'm bad in communication and I did be wrong.
> I tended to improve the codes but in false direction.
>
OK, in that case, I'm extremely sorry too, for jumping on you like that.
I hope you'll forgive me for the uneasiness it caused.
Now that I understand that you were simply trying to help, I would like to
express my gratitude for your time, effort and inputs in improving the design
of the stop-machine replacement.
I'm looking forward to working with you on this as well as future endeavours,
so I sincerely hope that we can put this unfortunate incident behind us and
collaborate effectively with renewed mutual trust and good-will.
Thank you very much!
Regards,
Srivatsa S. Bhat
^ permalink raw reply
* Re: [PATCH] lglock: add read-preference local-global rwlock
From: Oleg Nesterov @ 2013-03-01 18:28 UTC (permalink / raw)
To: Lai Jiangshan
Cc: Lai Jiangshan, linux-doc, peterz, fweisbec, Michel Lespinasse,
mingo, linux-arch, linux, xiaoguangrong, wangyun, paulmck, nikunj,
linux-pm, rusty, rostedt, rjw, namhyung, tglx, linux-arm-kernel,
netdev, linux-kernel, vincent.guittot, sbw, Srivatsa S. Bhat, tj,
akpm, linuxppc-dev
In-Reply-To: <5130E8E2.50206@cn.fujitsu.com>
Lai, I didn't read this discussion except the code posted by Michel.
I'll try to read this patch carefully later, but I'd like to ask
a couple of questions.
This version looks more complex than Michel's, why? Just curious, I
am trying to understand what I missed. See
http://marc.info/?l=linux-kernel&m=136196350213593
And I can't understand FALLBACK_BASE...
OK, suppose that CPU_0 does _write_unlock() and releases ->fallback_rwlock.
CPU_1 does _read_lock(), and ...
> +void lg_rwlock_local_read_lock(struct lgrwlock *lgrw)
> +{
> + struct lglock *lg = &lgrw->lglock;
> +
> + preempt_disable();
> + rwlock_acquire_read(&lg->lock_dep_map, 0, 0, _RET_IP_);
> + if (likely(!__this_cpu_read(*lgrw->reader_refcnt))) {
> + if (!arch_spin_trylock(this_cpu_ptr(lg->lock))) {
_trylock() fails,
> + read_lock(&lgrw->fallback_rwlock);
> + __this_cpu_add(*lgrw->reader_refcnt, FALLBACK_BASE);
so we take ->fallback_rwlock and ->reader_refcnt == FALLBACK_BASE.
CPU_0 does lg_global_unlock(lgrw->lglock) and finishes _write_unlock().
Interrupt handler on CPU_1 does _read_lock() notices ->reader_refcnt != 0
and simply does this_cpu_inc(), so reader_refcnt == FALLBACK_BASE + 1.
Then irq does _read_unlock(), and
> +void lg_rwlock_local_read_unlock(struct lgrwlock *lgrw)
> +{
> + switch (__this_cpu_dec_return(*lgrw->reader_refcnt)) {
> + case 0:
> + lg_local_unlock(&lgrw->lglock);
> + return;
> + case FALLBACK_BASE:
> + __this_cpu_sub(*lgrw->reader_refcnt, FALLBACK_BASE);
> + read_unlock(&lgrw->fallback_rwlock);
hits this case?
Doesn't look right, but most probably I missed something.
Oleg.
^ permalink raw reply
* Re: [PATCH v6 04/46] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks
From: Tejun Heo @ 2013-03-01 18:10 UTC (permalink / raw)
To: Srivatsa S. Bhat
Cc: Lai Jiangshan, linux-doc, peterz, fweisbec, oleg,
Michel Lespinasse, mingo, linux-arch, linux, xiaoguangrong,
wangyun, paulmck, nikunj, linux-pm, rusty, rostedt, rjw, namhyung,
tglx, linux-arm-kernel, netdev, linux-kernel, vincent.guittot,
sbw, akpm, linuxppc-dev
In-Reply-To: <512E7879.20109@linux.vnet.ibm.com>
Hello, Srivatsa.
On Thu, Feb 28, 2013 at 02:49:53AM +0530, Srivatsa S. Bhat wrote:
> Don't get me wrong - I'll whole-heartedly acknowledge and appreciate if
> _your_ code is better than mine. I just don't like the idea of somebody
> plagiarizing my ideas/code (or even others' ideas for that matter).
> However, I sincerely apologize in advance if I misunderstood/misjudged your
> intentions; I just wanted to voice my concerns out loud at this point,
> considering the bad feeling I got by looking at your responses collectively.
Although I don't know Lai personally, from my experience working with
him past several months on workqueue, I strongly doubt he has dark
urterior intenions. The biggest problem probably is that his
communication in English isn't very fluent yet and thus doesn't carry
the underlying intentions or tones very well and he tends to bombard
patches in quick succession without much explanation inbetween (during
3.8 cycle, I was receiving several workqueue patchsets days apart
trying to solve the same problem with completely different approaches
way before the discussion on the previous postings reach any kind of
consensus). A lot of that also probably comes from communication
problems.
Anyways, I really don't think he's trying to take claim of your work.
At least for now, you kinda need to speculate what he's trying to do
and then confirm that back to him, but once you get used to that part,
he's pretty nice to work with and I'm sure his communication will
improve in time (I think it has gotten a lot better than only some
months ago).
Thanks!
--
tejun
^ permalink raw reply
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