Mathieu Desnoyers
a961e40917
membarrier: Provide register expedited private command ...
This introduces a "register private expedited" membarrier command which
allows eventual removal of important memory barrier constraints on the
scheduler fast-paths. It changes how the "private expedited" membarrier
command (new to 4.14) is used from user-space.
This new command allows processes to register their intent to use the
private expedited command. This affects how the expedited private
command introduced in 4.14-rc is meant to be used, and should be merged
before 4.14 final.
Processes are now required to register before using
MEMBARRIER_CMD_PRIVATE_EXPEDITED, otherwise that command returns EPERM.
This fixes a problem that arose when designing requested extensions to
sys_membarrier() to allow JITs to efficiently flush old code from
instruction caches. Several potential algorithms are much less painful
if the user register intent to use this functionality early on, for
example, before the process spawns the second thread. Registering at
this time removes the need to interrupt each and every thread in that
process at the first expedited sys_membarrier() system call.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-10-19 22:13:40 -04:00
include: warn for inconsistent endian config definition
2017-09-08 18:26:48 -07:00
ceph: more accurate statfs
2017-09-06 19:56:49 +02:00
The diff is dominated by the Allwinner A10/A20 SoCs getting converted to
2017-09-13 11:04:14 -07:00
firmware /meson
Merge branch 'i2c/for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
2017-09-09 14:18:40 -07:00
First round of IIO fixes for the 4.14 cycle
2017-09-25 10:58:22 +02:00
Merge branch '4.14-features' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2017-09-15 20:43:33 -07:00
MTD changes for 4.14:
2017-09-09 14:48:21 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-09-06 14:45:08 -07:00
net/mlx5: Check device capability for maximum flow counters
2017-09-28 07:23:09 +03:00
mmc: Delete bounce buffer handling
2017-10-04 10:22:55 +02:00
netfilter: xt_hashlimit: add rate match mode
2017-09-04 12:54:42 +02:00
netfilter: ebtables: fix race condition in frame_filter_net_init()
2017-09-29 13:36:06 +02:00
ARM/arm64: SoC platform updates for v4.14
2017-09-10 20:35:46 -07:00
membarrier: Provide register expedited private command
2017-10-19 22:13:40 -04:00
ARM: SoC driver updates for v4.14
2017-09-10 20:40:00 -07:00
NFS client updates for Linux 4.14
2017-09-11 22:01:44 -07:00
Device properties framework updates for v4.14-rc1
2017-09-05 12:50:00 -07:00
Major additions:
2017-09-22 16:16:41 -10:00
exec: load_script: kill the onstack interp[BINPRM_BUF_SIZE] array
2017-10-03 17:54:25 -07:00
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
include/linux/bitfield.h: remove 32bit from FIELD_GET comment block
2017-10-03 17:54:25 -07:00
bitmap: introduce BITMAP_FROM_U64()
2017-09-08 18:26:49 -07:00
bitops: avoid integer overflow in GENMASK(_ULL)
2017-09-08 18:26:48 -07:00
blktrace: Fix potential deadlock between delete & sysfs ops
2017-09-25 08:56:05 -06:00
netfilter: xt_bpf: Fix XT_BPF_MODE_FD_PINNED mode of 'xt_bpf_info_v1'
2017-10-09 15:18:04 +02:00
SCSI misc on 20170907
2017-09-07 21:11:05 -07:00
fs/mpage.c: fix mpage_writepage() for pages with buffers
2017-10-13 16:18:33 -07:00
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
Merge branch 'work.ipc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-09-14 17:37:26 -07:00
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-09-04 12:21:28 -07:00
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-09-04 12:21:28 -07:00
smp/hotplug: Hotplug state fail injection
2017-09-25 22:11:44 +02:00
cpumask: make cpumask_next() out-of-line
2017-09-08 18:26:51 -07:00
sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs
2017-09-07 11:45:21 +02:00
- Some request-based DM core and DM multipath fixes and cleanups
2017-09-14 13:43:16 -07:00
ovl: fix relatime for directories
2017-09-05 12:53:11 +02:00
dax: remove the pmem_dax_ops->flush abstraction
2017-09-11 11:00:55 -04:00
Driver core fixes for 4.14-rc4
2017-10-03 08:57:07 -07:00
dma-mapping updates for 4.14:
2017-09-12 13:30:06 -07:00
Merge branch 'topic/dmatest' into for-linus
2017-09-06 21:55:10 +05:30
Just a single conversion to the new UUID API for this merge window.
2017-09-12 13:27:21 -07:00
include/linux/fs.h: fix comment about struct address_space
2017-10-03 17:54:26 -07:00
fscache: remove unused ->now_uncached callback
2017-09-06 17:27:26 -07:00
mm: treewide: remove GFP_TEMPORARY allocation flag
2017-09-13 18:53:16 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
2017-09-05 11:54:41 -07:00
mm/hmm: fix build when HMM is disabled
2017-09-08 18:26:46 -07:00
mm: thp: check pmd migration entry in common path
2017-09-08 18:26:45 -07:00
Drivers: hv: vmbus: Fix bugs in rescind handling
2017-10-04 11:25:09 +02:00
locking/rtmutex: replace top-waiter and pi_waiters leftmost caching
2017-09-08 18:26:49 -07:00
Input: uinput - avoid FF flush when destroying device
2017-09-21 16:31:22 -07:00
lib/interval_tree: fast overlap detection
2017-09-08 18:26:49 -07:00
lib/interval-tree: correct comment wrt generic flavor
2017-09-08 18:26:49 -07:00
iommu: Fix comment for iommu_ops.map_sg
2017-09-27 17:02:45 +02:00
mm/device-public-memory: device memory cache coherent with CPU
2017-09-08 18:26:46 -07:00
ipc: optimize semget/shmget/msgget for lots of keys
2017-09-08 18:26:51 -07:00
ipc: optimize semget/shmget/msgget for lots of keys
2017-09-08 18:26:51 -07:00
Revert "genirq: Restrict effective affinity to interrupts actually using it"
2017-09-21 11:54:44 +02:00
Device properties framework updates for v4.14-rc1
2017-09-05 12:50:00 -07:00
linux/kernel.h: add/correct kernel-doc notation
2017-10-13 16:18:33 -07:00
KEYS: prevent creating a different user's keyrings
2017-09-25 15:19:57 +01:00
kmod: split off umh headers into its own file
2017-09-08 18:26:51 -07:00
selinux/stable-4.14 PR 20170831
2017-09-12 13:21:00 -07:00
net: mdio-mux: add mdio_mux parameter to mdio_mux_init()
2017-09-05 14:42:52 -07:00
x86/mm: Make the SME mask a u64
2017-09-07 11:53:11 +02:00
mm: memcontrol: use int for event/state parameter in several functions
2017-09-06 17:27:27 -07:00
mm/memory_hotplug: introduce add_pages
2017-09-08 18:26:46 -07:00
mm/hmm: avoid bloating arch that do not make use of HMM
2017-09-08 18:26:46 -07:00
mm/hmm: avoid bloating arch that do not make use of HMM
2017-09-08 18:26:46 -07:00
mm/migrate: new migrate mode MIGRATE_SYNC_NO_COPY
2017-09-08 18:26:46 -07:00
include/linux/mm.h: fix typo in VM_MPX definition
2017-10-03 17:54:23 -07:00
membarrier: Provide register expedited private command
2017-10-19 22:13:40 -04:00
mm, oom_reaper: skip mm structs with mmu notifiers
2017-10-03 17:54:24 -07:00
mm/memory_hotplug: change pfn_to_section_nr/section_nr_to_pfn macro to inline function
2017-10-03 17:54:25 -07:00
Merge branch 'work.ipc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-09-14 17:37:26 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-09-06 14:45:08 -07:00
NFS: remove jiffies field from access cache
2017-09-06 12:32:37 -04:00
powerpc/watchdog: Make use of watchdog_nmi_probe()
2017-10-04 10:53:54 +02:00
nvmet-fc: sync header templates with comments
2017-09-25 12:42:11 -06:00
nvme: add transport SGL definitions
2017-09-25 08:56:05 -06:00
include/linux/of.h: provide of_n_{addr,size}_cells wrappers for !CONFIG_OF
2017-10-13 16:18:32 -07:00
of: provide inline helper for of_find_device_by_node
2017-09-19 12:20:44 -05:00
mm: test code to write THP to swap device as a whole
2017-09-06 17:27:28 -07:00
mm: implement find_get_pages_range()
2017-09-06 17:27:26 -07:00
mm: remove nr_pages argument from pagevec_lookup{,_range}()
2017-09-06 17:27:27 -07:00
Merge branch 'pci/endpoint' into next
2017-09-07 13:24:11 -05:00
PCI: Add dummy pci_acs_enabled() for CONFIG_PCI=n build
2017-09-25 11:08:20 -05:00
Merge branch 'pci/trivial' into next
2017-09-07 13:24:20 -05:00
Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-09-04 13:56:37 -07:00
drivers/pps: aesthetic tweaks to PPS-related content
2017-09-08 18:26:51 -07:00
drivers/pps: aesthetic tweaks to PPS-related content
2017-09-08 18:26:51 -07:00
proc: uninline proc_create()
2017-09-08 18:26:47 -07:00
rbtree: cache leftmost node internally
2017-09-08 18:26:48 -07:00
rbtree: cache leftmost node internally
2017-09-08 18:26:48 -07:00
SCSI misc on 20170907
2017-09-07 21:11:05 -07:00
lib/rhashtable: fix comment on locks_mul default value
2017-09-08 18:26:49 -07:00
lib/interval_tree: fast overlap detection
2017-09-08 18:26:49 -07:00
locking/rtmutex: replace top-waiter and pi_waiters leftmost caching
2017-09-08 18:26:49 -07:00
sched/debug: Add explicit TASK_PARKED printing
2017-09-29 11:02:57 +02:00
selinux/stable-4.14 PR 20170831
2017-09-12 13:21:00 -07:00
Merge branch 'work.ipc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-09-14 17:37:26 -07:00
Merge branch 'work.ipc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-09-14 17:37:26 -07:00
userfaultfd: shmem: add shmem_mfill_zeropage_pte for userfaultfd support
2017-09-06 17:27:28 -07:00
mm: track actual nr_scanned during shrink_slab()
2017-09-06 17:27:24 -07:00
udp: drop head states only when all skb references are gone
2017-09-07 20:02:39 -07:00
mm: add SLUB free list pointer obfuscation
2017-09-06 17:27:24 -07:00
smpboot/threads, watchdog/core: Avoid runtime allocation
2017-09-14 11:41:06 +02:00
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-09-04 11:52:29 -07:00
string.h: un-fortify memcpy_and_pad
2017-09-11 12:29:41 -04:00
sched/wait: Add swq_has_sleeper()
2017-09-15 16:57:10 +02:00
mm/ZONE_DEVICE: new type of ZONE_DEVICE for unaddressable memory
2017-09-08 18:26:46 -07:00
mm/ZONE_DEVICE: new type of ZONE_DEVICE for unaddressable memory
2017-09-08 18:26:46 -07:00
syscalls: Use CHECK_DATA_CORRUPTION for addr_limit_user_check
2017-09-17 19:45:32 +02:00
kmemleak: clear stale pointers from task stacks
2017-10-13 16:18:33 -07:00
Merge branch 'work.ipc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-09-14 17:37:26 -07:00
timer: Prepare to change timer callback argument type
2017-09-28 16:30:36 +02:00
bpf: one perf event close won't free bpf program attached by another perf event
2017-09-20 14:10:29 -07:00
kmod: split off umh headers into its own file
2017-09-08 18:26:51 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2017-09-11 18:34:47 -07:00
mm, swap: add swap readahead hit statistics
2017-09-06 17:27:29 -07:00
mm: consider the number in local CPUs when reading NUMA stats
2017-09-08 18:26:47 -07:00
vga: optimise console scrolling
2017-09-08 18:26:48 -07:00
sched/wait: Introduce wakeup boomark in wake_up_page_bit
2017-09-14 09:56:18 -07:00
workqueue: Fix flag collision
2017-09-05 06:34:17 -07:00
