701f3b3149
Pull locking updates from Ingo Molnar: "The main changes in the locking subsystem in this cycle were: - Add the Linux Kernel Memory Consistency Model (LKMM) subsystem, which is an an array of tools in tools/memory-model/ that formally describe the Linux memory coherency model (a.k.a. Documentation/memory-barriers.txt), and also produce 'litmus tests' in form of kernel code which can be directly executed and tested. Here's a high level background article about an earlier version of this work on LWN.net: https://lwn.net/Articles/718628/ The design principles: "There is reason to believe that Documentation/memory-barriers.txt could use some help, and a major purpose of this patch is to provide that help in the form of a design-time tool that can produce all valid executions of a small fragment of concurrent Linux-kernel code, which is called a "litmus test". This tool's functionality is roughly similar to a full state-space search. Please note that this is a design-time tool, not useful for regression testing. However, we hope that the underlying Linux-kernel memory model will be incorporated into other tools capable of analyzing large bodies of code for regression-testing purposes." [...] "A second tool is klitmus7, which converts litmus tests to loadable kernel modules for direct testing. As with herd7, the klitmus7 code is freely available from http://diy.inria.fr/sources/index.html (and via "git" at https://github.com/herd/herdtools7)" [...] Credits go to: "This patch was the result of a most excellent collaboration founded by Jade Alglave and also including Alan Stern, Andrea Parri, and Luc Maranget." ... and to the gents listed in the MAINTAINERS entry: LINUX KERNEL MEMORY CONSISTENCY MODEL (LKMM) M: Alan Stern <stern@rowland.harvard.edu> M: Andrea Parri <parri.andrea@gmail.com> M: Will Deacon <will.deacon@arm.com> M: Peter Zijlstra <peterz@infradead.org> M: Boqun Feng <boqun.feng@gmail.com> M: Nicholas Piggin <npiggin@gmail.com> M: David Howells <dhowells@redhat.com> M: Jade Alglave <j.alglave@ucl.ac.uk> M: Luc Maranget <luc.maranget@inria.fr> M: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> The LKMM project already found several bugs in Linux locking primitives and improved the understanding and the documentation of the Linux memory model all around. - Add KASAN instrumentation to atomic APIs (Dmitry Vyukov) - Add RWSEM API debugging and reorganize the lock debugging Kconfig (Waiman Long) - ... misc cleanups and other smaller changes" * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits) locking/Kconfig: Restructure the lock debugging menu locking/Kconfig: Add LOCK_DEBUGGING_SUPPORT to make it more readable locking/rwsem: Add DEBUG_RWSEMS to look for lock/unlock mismatches lockdep: Make the lock debug output more useful locking/rtmutex: Handle non enqueued waiters gracefully in remove_waiter() locking/atomic, asm-generic, x86: Add comments for atomic instrumentation locking/atomic, asm-generic: Add KASAN instrumentation to atomic operations locking/atomic/x86: Switch atomic.h to use atomic-instrumented.h locking/atomic, asm-generic: Add asm-generic/atomic-instrumented.h locking/xchg/alpha: Remove superfluous memory barriers from the _local() variants tools/memory-model: Finish the removal of rb-dep, smp_read_barrier_depends(), and lockless_dereference() tools/memory-model: Add documentation of new litmus test tools/memory-model: Remove mention of docker/gentoo image locking/memory-barriers: De-emphasize smp_read_barrier_depends() some more locking/lockdep: Show unadorned pointers mutex: Drop linkage.h from mutex.h tools/memory-model: Remove rb-dep, smp_read_barrier_depends, and lockless_dereference tools/memory-model: Convert underscores to hyphens tools/memory-model: Add a S lock-based external-view litmus test tools/memory-model: Add required herd7 version to README file ... |
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ABI | ||
accelerators | ||
accounting | ||
acpi | ||
admin-guide | ||
aoe | ||
arm | ||
arm64 | ||
auxdisplay | ||
backlight | ||
blackfin | ||
block | ||
blockdev | ||
bpf | ||
bus-devices | ||
cdrom | ||
cgroup-v1 | ||
cma | ||
connector | ||
console | ||
core-api | ||
cpu-freq | ||
cpuidle | ||
cris | ||
crypto | ||
dev-tools | ||
device-mapper | ||
devicetree | ||
doc-guide | ||
driver-api | ||
driver-model | ||
early-userspace | ||
EDID | ||
extcon | ||
fault-injection | ||
fb | ||
features | ||
filesystems | ||
firmware_class | ||
fmc | ||
fpga | ||
frv | ||
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hid | ||
hwmon | ||
i2c | ||
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ide | ||
iio | ||
infiniband | ||
input | ||
ioctl | ||
isdn | ||
kbuild | ||
kdump | ||
kernel-hacking | ||
laptops | ||
leds | ||
lightnvm | ||
livepatch | ||
locking | ||
m68k | ||
maintainer | ||
md | ||
media | ||
memory-devices | ||
metag | ||
mic | ||
mips | ||
misc-devices | ||
mmc | ||
mn10300 | ||
mtd | ||
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phy | ||
platform | ||
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sysctl | ||
target | ||
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trace | ||
translations | ||
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userspace-api | ||
virtual | ||
vm | ||
w1 | ||
watchdog | ||
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x86 | ||
xtensa | ||
.gitignore | ||
00-INDEX | ||
atomic_bitops.txt | ||
atomic_t.txt | ||
bcache.txt | ||
bt8xxgpio.txt | ||
btmrvl.txt | ||
bus-virt-phys-mapping.txt | ||
cachetlb.txt | ||
cgroup-v2.txt | ||
Changes | ||
circular-buffers.txt | ||
clearing-warn-once.txt | ||
clk.txt | ||
CodingStyle | ||
conf.py | ||
cpu-load.txt | ||
cputopology.txt | ||
crc32.txt | ||
dcdbas.txt | ||
debugging-modules.txt | ||
debugging-via-ohci1394.txt | ||
dell_rbu.txt | ||
digsig.txt | ||
DMA-API-HOWTO.txt | ||
DMA-API.txt | ||
DMA-attributes.txt | ||
DMA-ISA-LPC.txt | ||
docutils.conf | ||
dontdiff | ||
efi-stub.txt | ||
eisa.txt | ||
flexible-arrays.txt | ||
futex-requeue-pi.txt | ||
gcc-plugins.txt | ||
highuid.txt | ||
hw_random.txt | ||
hwspinlock.txt | ||
index.rst | ||
Intel-IOMMU.txt | ||
intel_txt.txt | ||
io-mapping.txt | ||
io_ordering.txt | ||
iostats.txt | ||
IPMI.txt | ||
IRQ-affinity.txt | ||
IRQ-domain.txt | ||
IRQ.txt | ||
irqflags-tracing.txt | ||
isa.txt | ||
isapnp.txt | ||
kernel-per-CPU-kthreads.txt | ||
kobject.txt | ||
kprobes.txt | ||
kref.txt | ||
ldm.txt | ||
lockup-watchdogs.txt | ||
logo.gif | ||
logo.txt | ||
lsm.txt | ||
lzo.txt | ||
mailbox.txt | ||
Makefile | ||
memory-barriers.txt | ||
memory-hotplug.txt | ||
men-chameleon-bus.txt | ||
nommu-mmap.txt | ||
ntb.txt | ||
numastat.txt | ||
padata.txt | ||
parport-lowlevel.txt | ||
percpu-rw-semaphore.txt | ||
phy.txt | ||
pi-futex.txt | ||
pnp.txt | ||
preempt-locking.txt | ||
pwm.txt | ||
rbtree.txt | ||
remoteproc.txt | ||
rfkill.txt | ||
robust-futex-ABI.txt | ||
robust-futexes.txt | ||
rpmsg.txt | ||
rtc.txt | ||
SAK.txt | ||
sgi-ioc4.txt | ||
siphash.txt | ||
SM501.txt | ||
smsc_ece1099.txt | ||
speculation.txt | ||
static-keys.txt | ||
SubmittingPatches | ||
svga.txt | ||
switchtec.txt | ||
sync_file.txt | ||
tee.txt | ||
this_cpu_ops.txt | ||
unaligned-memory-access.txt | ||
vfio-mediated-device.txt | ||
vfio.txt | ||
video-output.txt | ||
xillybus.txt | ||
xz.txt | ||
zorro.txt |