Peter Zijlstra
45bfb2e504
perf: Add AUX area to ring buffer for raw data streams ...
This patch introduces "AUX space" in the perf mmap buffer, intended for
exporting high bandwidth data streams to userspace, such as instruction
flow traces.
AUX space is a ring buffer, defined by aux_{offset,size} fields in the
user_page structure, and read/write pointers aux_{head,tail}, which abide
by the same rules as data_* counterparts of the main perf buffer.
In order to allocate/mmap AUX, userspace needs to set up aux_offset to
such an offset that will be greater than data_offset+data_size and
aux_size to be the desired buffer size. Both need to be page aligned.
Then, same aux_offset and aux_size should be passed to mmap() call and
if everything adds up, you should have an AUX buffer as a result.
Pages that are mapped into this buffer also come out of user's mlock
rlimit plus perf_event_mlock_kb allowance.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kaixu Xia <kaixu.xia@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Robert Richter <rric@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@infradead.org
Cc: adrian.hunter@intel.com
Cc: kan.liang@intel.com
Cc: markus.t.metzger@intel.com
Cc: mathieu.poirier@linaro.org
Link: http://lkml.kernel.org/r/1421237903-181015-3-git-send-email-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 17:13:46 +02:00
libceph: tcp_nodelay support
2015-02-19 13:31:40 +03:00
fsl /bestcomm
irqchip: gicv3-its: Define macros for GITS_CTLR fields
2015-03-08 05:34:35 +00:00
regulator: palmas: Correct TPS659038 register definition for REGEN2
2015-03-17 12:19:14 +00:00
net/mlx4_core: Fix wrong mask and error flow for the update-qp command
2015-03-02 15:27:19 -05:00
MTD updates for 3.20-rc1
2015-02-18 08:01:44 -08:00
Revert "pinctrl: consumer: use correct retval for placeholder functions"
2015-03-05 10:08:14 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2015-02-21 12:59:04 -08:00
regulator: Fix documentation for regmap in the config
2015-03-18 11:42:30 +00:00
rtc: add driver for DS1685 family of real time clocks
2015-02-16 17:56:05 -08:00
soc /ti
spi: fix a typo in comment.
2015-03-03 14:14:26 +00:00
Merge branch 'cleanups'
2015-02-18 07:28:37 -08:00
Revert "USB: serial: make bulk_out_size a lower limit"
2015-02-26 17:02:15 +01:00
Merge branch 'getname2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-02-17 15:27:47 -08:00
Merge branch 'lazytime' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-02-17 16:12:34 -08:00
watchdog: bcm47xx_wdt.c: add restart handler support
2015-02-17 21:33:27 +01:00
bitmap, cpumask, nodemask: remove dedicated formatting functions
2015-02-13 21:21:39 -08:00
Merge branch 'for-3.20/core' of git://git.kernel.dk/linux-block
2015-02-12 14:13:23 -08:00
bpf: Make internal bpf API independent of CONFIG_BPF_SYSCALL #ifdefs
2015-04-02 13:25:49 +02:00
clk: Add __clk_hw_set_clk helper function
2015-02-18 09:40:07 -08:00
clk: introduce clk_is_match
2015-03-11 15:56:59 -07:00
clockevents: Introduce mode specific callbacks
2015-02-18 15:16:23 +01:00
clocksource: Rename __clocksource_updatefreq_*() to __clocksource_update_freq_*()
2015-03-13 08:07:08 +01:00
compiler: introduce __alias(symbol) shortcut
2015-02-13 21:21:40 -08:00
kasan: enable instrumentation of global variables
2015-02-13 21:21:42 -08:00
kasan: enable instrumentation of global variables
2015-02-13 21:21:42 -08:00
kernel: make READ_ONCE() valid on const arguments
2015-02-21 10:27:33 -08:00
cpuidle / sleep: Use broadcast timer for states that stop local timer
2015-03-05 23:13:19 +01:00
bitmap, cpumask, nodemask: remove dedicated formatting functions
2015-02-13 21:21:39 -08:00
lib/halfmd4.c: simplify includes
2015-02-12 18:54:15 -08:00
VFS: Split DCACHE_FILE_TYPE into regular and special types
2015-02-22 11:38:38 -05:00
debugfs: Provide a file creation function that also takes an initial size
2015-02-17 12:21:51 -05:00
dm snapshot: suspend merging snapshot when doing exception handover
2015-02-27 14:53:16 -05:00
File locking related fixes for v3.20 (pile #2 )
2015-02-18 10:21:47 -08:00
tracing, perf: Implement BPF programs attached to kprobes
2015-04-02 13:25:49 +02:00
HID: hid-sensor-hub: Correct documentation
2015-02-17 13:34:44 +01:00
mm: numa: do not trap faults on the huge zero page
2015-02-12 18:54:08 -08:00
Merge branch 'i2c/for-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
2015-02-21 12:41:50 -08:00
kasan: enable stack instrumentation
2015-02-13 21:21:41 -08:00
genirq / PM: Add flag for shared NO_SUSPEND interrupt lines
2015-03-04 21:42:19 +01:00
genirq / PM: Add flag for shared NO_SUSPEND interrupt lines
2015-03-04 21:42:19 +01:00
kasan, module: move MODULE_ALIGN macro into <linux/moduleloader.h>
2015-03-12 18:46:08 -07:00
kdb: Avoid printing KERN_ levels to consoles
2015-02-19 12:39:02 -06:00
kernel.h: remove ancient __FUNCTION__ hack
2015-02-12 18:54:13 -08:00
kernfs: remove KERNFS_STATIC_NAME
2015-02-13 21:21:36 -08:00
kexec: add IND_FLAGS macro
2015-02-17 14:34:51 -08:00
Fairly small update, but there are some interesting new features.
2015-02-13 09:55:09 -08:00
ata: Add a new flag to destinguish sas controller
2015-03-19 14:14:43 -04:00
memcg: reparent list_lrus and free kmemcg_id on css offline
2015-02-12 18:54:10 -08:00
list_lru: introduce per-memcg lists
2015-02-12 18:54:09 -08:00
mm: numa: do not dereference pmd outside of the lock during NUMA hinting fault
2015-02-12 18:54:08 -08:00
mm: allow page fault handlers to perform the COW
2015-02-16 17:56:03 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-02-17 17:41:19 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching
2015-03-18 10:46:39 -07:00
kasan, module: move MODULE_ALIGN macro into <linux/moduleloader.h>
2015-03-12 18:46:08 -07:00
mutex: remove unused field "name" in debug mode
2015-02-14 11:32:59 -08:00
netdevice.h: fix ndo_bridge_* comments
2015-03-17 14:58:39 -04:00
Merge branch 'for-3.20' of git://linux-nfs.org/~bfields/linux
2015-02-12 10:39:41 -08:00
NFS: Fix a regression in the read() syscall
2015-03-03 13:02:29 -05:00
NFSv4.1: Clean up bind_conn_to_session
2015-02-18 13:11:09 -08:00
bitmap, cpumask, nodemask: remove dedicated formatting functions
2015-02-13 21:21:39 -08:00
NVMe: Fix potential corruption during shutdown
2015-02-19 16:15:37 -07:00
of/platform: Fix sparc:allmodconfig build
2015-03-13 09:45:24 -05:00
perf: Add AUX area to ring buffer for raw data streams
2015-04-02 17:13:46 +02:00
hexdump: make it return number of bytes placed in buffer
2015-02-12 18:54:15 -08:00
lib/rbtree.c: fix typo in comment
2015-02-17 14:34:52 -08:00
rhashtable: remove indirection for grow/shrink decision functions
2015-02-27 16:06:02 -05:00
vfs: remove get_xip_mem
2015-02-16 17:56:03 -08:00
mm: numa: slow PTE scan rate if migration failures occur
2015-03-25 16:20:31 -07:00
bitmap, cpumask, nodemask: remove dedicated formatting functions
2015-02-13 21:21:39 -08:00
bitmap, cpumask, nodemask: remove dedicated formatting functions
2015-02-13 21:21:39 -08:00
serial: uapi: Declare all userspace-visible io types
2015-03-07 03:39:55 +01:00
vmscan: per memory cgroup slab shrinkers
2015-02-12 18:54:09 -08:00
xps: must clear sender_cpu before forwarding
2015-03-11 23:51:18 -04:00
mm: slub: add kernel address sanitizer support for slub allocator
2015-02-13 21:21:41 -08:00
slab: embed memcg_cache_params to kmem_cache
2015-02-12 18:54:09 -08:00
mm: slub: share object_err function
2015-02-13 21:21:41 -08:00
mm/util: add kstrdup_const
2015-02-13 21:21:35 -08:00
libstring_helpers.c:string_get_size(): return void
2015-02-12 18:54:13 -08:00
PM / sleep: Re-implement suspend-to-idle handling
2015-02-13 23:49:36 +01:00
mm: remove remaining references to NUMA hinting bits and helpers
2015-02-12 18:54:08 -08:00
thermal: Introduce dummy functions when thermal is not defined
2015-02-24 14:40:42 -04:00
PM / sleep: Make it possible to quiesce timers during suspend-to-idle
2015-02-15 19:40:09 +01:00
time: Add timerkeeper::tkr_raw
2015-03-27 09:45:07 +01:00
time: Add ktime_get_tai_ns()
2015-03-27 09:45:10 +01:00
linux/types.h: Always use unsigned long for pgoff_t
2015-02-12 18:54:13 -08:00
new helper: dup_iter()
2015-02-17 22:21:11 -05:00
kasan, module, vmalloc: rework shadow allocation for modules
2015-03-12 18:46:08 -07:00
Merge branch 'for-3.20/drivers' of git://git.kernel.dk/linux-block
2015-02-12 14:30:53 -08:00
workqueue: fix hang involving racing cancel[_delayed]_work_sync()'s for PREEMPT_NONE
2015-03-05 08:04:13 -05:00
mm/zpool: add name argument to create zpool
2015-02-12 18:54:12 -08:00
mm/zpool: add name argument to create zpool
2015-02-12 18:54:12 -08:00
