Version 2.8.5

[lttng-modules.git] / ChangeLog

2017-04-25 (National Zucchini Bread Day) LTTng modules 2.8.5
	* Revert "Documentation: lttng-modules 2.8 supports Linux < 4.10"
	* Fix: kref changes for kernel 4.11
	* Fix: timers cputime_t arguments replaced by ull in kernel 4.11
	* Fix: update scsi instrumentation for kernel 4.11
	* Fix: changes to the vm_op fault cb prototype in libringbuffer
	* Fix: update btrfs instrumentation for kernel 4.11
	* Fix: update mm_vmscan instrumentation for kernel 4.11
	* Fix: only include linux/cpuhotplug.h for kernels >= 4.10
	* Fix: 4.10 hotplug adaptation backward compat
	* Adapt lttng-modules to Linux 4.10 cpu hotplug state machine
	* Fix: 4.10 btrfs instrumentation update backward compat
	* Update btrfs instrumentation for 4.10 kernel
	* btrfs instrumentation: update to 4.10 kernel
	* timer instrumentation: adapt to ktime_t without union
	* Fix: Always build vmscan probe
	* Fix: use of uninitialized ret value in lttng_abi_open_metadata_stream
	* Fix: atomic_add_unless() returns true/false rather than prior value
	* Documentation: lttng-modules 2.8 supports Linux < 4.10

2017-02-17 (National Cabbage Day) LTTng modules 2.8.4
	* Fix: nmi-safe clock on 32-bit systems
	* Fix: asoc instrumentation for RHEL 7.3
	* Fix: SCSI instrumentation for SLES12 SP2
	* Add SUSE Linux Enterprise kernel version tests
	* Fix: preemptible and migratable context error handling

2016-10-13 (International Day for Failure) LTTng modules 2.8.3
	* Fix: bump stable kernel version ranges for clock work-around

2016-10-07 (National Frappé Day) LTTng modules 2.8.2
	* Fix: show warning for broken clock work-around
	* Fix: work-around upstream Linux timekeeping bug

2016-10-03 (National Techies Day) LTTng modules 2.8.1
	* Fix: handle large number of pages or subbuffers per buffer
	* Fix: unregister cpu hotplug notifier on buffer alloc error
	* Fix: sa_family is of type unsigned short
	* Fix: check for sizeof sa_family to save sa_family in accept and connect
	* Cleanup: reuse code in accept() and accept4() instrumentation
	* Add x86-64 override for accept4 syscall
	* Fix: use printk_once() for wrapper warning messages
	* Fix: btrfs instrumentation for 4.8 kernel
	* Fix: update mm_vmscan instrumentation for kernel 4.8
	* Fix: napi instrumentation for 4.8 kernels
	* Fix: update block instrumentation to compile on 4.8 kernels
	* Fix: timer wrapper: support kernels >= 4.8
	* Fix: x86-64 accept instrumentation
	* Fix: Add support for 4.6.4-rt8 kernel
	* Fix: update scsi instrumentation for 4.7+ kernels
	* Fix: Use fs_initcall instead of rootfs_initcall
	* Fix: Add kernel configuration for lttng clock plugin
	* Fix: the clock plugin must be initiated before first use of the clock
	* Fix: tests/Kbuild for older kernels
	* Fix: annotate bytecode interpreter for kernel stack validator

2016-05-20 (Bike-to-Work Day) LTTng modules 2.8.0
	* Fix: ring buffer: honor switch parameter type in remote switch
	* Fix: only flush non-metadata channels
	* Fix: don't perform extra flush on metadata channel
	* Fix: flush empty packets on snapshot channel
	* Fix: do not generate packet at destroy after stop
	* Fix: compat ioctl for flush/get metadata version
	* Fix: ctf_string() should handle NULL pointers
	* Fix: portability: no arith on void pointer
	* Fix: add missing tests/Kbuild
	* Test clock override plugin
	* Fix: add modules target to base Makefile
	* Fix: make clean does not include dot-config
	* Fix: trigger build error if CONFIG_TRACEPOINTS is not set
	* Documentation: document that CONFIG_MODULES not required when builtin
	* Fix: mm_page_alloc_extfrag instrumentation for kernel 3.16.35
	* Fix: integer endianness metadata generation
	* Fix: endianness of integers received by filter

2016-04-26 LTTng modules 2.8.0-rc2
	* Fix: writeback probe on RHEL >= 3.10.0-327.10.1
	* Fix: RHEL kernel 3.10.0-327.13.1 compat
	* Fix: ctf_user_integer should not trigger page fault
	* Fix: lib_ring_buffer_copy_from_user_inatomic error handling
	* Add comment describing ioctl number duplication
	* Fix: remove unused gfpflags.h from btrfs and compaction instrumentation
	* Fix: Remove dead code from filter interpreter
	* Fix: x86 kvm mmutrace instrumentation for kernel < 3.6
	* Fix: mm_vmscan instrumentation: remove unused gfpflags.h include
	* Fix: use of uninitialized ret value in lttng_abi_create_event
	* Fix: kmem instrumentation: remove unused gfpflags.h include
	* Fix: 4.6 kernel: use in_compat_syscall
	* Fix: use BUG_ON instead of accessing array subscript above array bounds
	* Fix: Add granularity to RHEL kernel version checks

2016-03-18 (Awkward Moments Day) LTTng modules 2.8.0-rc1
	* Bump minor tracer ABI version
	* Fix: build against out-of-tree kernel build
	* probes/Kbuild: remove upper level header path
	* Move leftover relative include paths to system paths
	* syscall instrumentation: use system headers
	* tracepoint event instrumentation: use system headers
	* Use system include path in wrappers
	* libs: use system include paths
	* Use system header paths in core implementation files
	* Use system include paths in root directory headers
	* Use system include paths in probes
	* Update gitignore
	* Use system include paths in lttng-types.h
	* Use system include paths in lttng-tracepoint-event-impl.h
	* Use system include path in probes/define_trace.h
	* Use system include paths in probes/lttng-tracepoint-event-impl.h
	* Rename probes/lttng-events.h to probes/lttng-tracepoint-event-impl.h
	* Add makefile directory to include path
	* Fix: event ctx get size should be after chan ctx
	* Fix: filter interpreter with userspace strings
	* Fix: rename kvm x86 TRACE_SYSTEM to avoid name clash
	* Fix: format address fields as hexadecimal
	* PowerPC-64 ABIv1: add build error if KALLSYMS_ALL is missing
	* Fix: system call instrumentation overrides
	* Fix: page_alloc wrapper incorrect parenthesis
	* Fix: system call tracing for arm-64 compat !CONFIG_UID16
	* Fix: add struct user_msghdr forward declaration for older kernels
	* Cleanup: Remove unused lttng-types module
	* Fix: add missing versions and init call for page_alloc wrapper
	* Fix: Define lttng-tracer metadata only once
	* Fix: Add CONFIG_LTTNG to modules_install target
	* Fix: Use kbuild env instead of a custom var KERNELDIR
	* Update clock offset comment
	* clock offset: print negative value in metadata
	* Fix: handle negative clock offset
	* Fix: sched instrumentation for 4.1-rt11
	* Add RT patch version macros
	* Expect filter context identifiers starting with $ctx.
	* ARM64: wire up compat system calls
	* Add support for arm64 syscalls
	* Fix: Ubuntu kernel range for block_rq_complete
	* Fix: Ubuntu kernel range for mm_page_alloc_extfrag
	* Fix: update vmscan instrumentation for kernel 4.5
	* Fix: check reference counts for overflow
	* Fix: RHEL 7.2 scsi instrumentation
	* Fix: RHEL 7.2 kvm instrumentation
	* Kconfig: describe both module and in-kernel compilation options
	* Add comments and indentation to Makefile
	* Add support for built-in kernel build
	* Rename sub makefiles to Kbuild
	* Cleanup sub makefiles
	* Make goals configurable with CONFIG_LTTNG
	* Fix: Use generic raw_irqs_disabled_flags
	* Fix: Use MAX_RT_PRIO offset in sched_wakeup_template
	* Fix: update sched instrumentation for kernel 4.4.0
	* Bump version number for development branch
	* Fix: interruptible context: reversed logic
	* Contexts for RT debugging
	* Fix: instrumentation: v4lv2 missing include
	* Fix: header size larger than 256 bytes
	* Instrument x86 page faults
	* Fix: irq_vectors TRACE_SYSTEM name
	* Instrument x86_irq_vectors
	* Fix: tracepoint listing misses last loaded probe
	* Fix: lttng trace-clock needs to disable preemption
	* Tracepoint event: add "TP_code_post()"
	* Implement array and sequence bitfields
	* Fix: kmem: add mm.h include
	* Add page frame number (pfn) to kmem page events
	* Use pfn rather than struct page in ring buffer array
	* Implement clock plugin support
	* Command to regenerate the metadata of a session
	* Fix: writeback instrumentation update for 4.3 Linux kernel
	* Fix: update sched wakeup instrumentation for 4.3 kernel
	* Fix: lttng-test build failure for kernels < 3.0
	* Use 3.18 syscall instrumentation for MIPS32
	* Update the MIPS32 syscall instrumentation to 3.18
	* Fix: Move pipe override to the arch specific pointers_override.h
	* Implement lttng test module
	* Cleanup: remove logically dead code
	* Fix: filter validator use after free
	* Fix: use after free in channel release
	* Fix: non-enabler events should be disabled by default
	* Fix: build failure on 2.6.36
	* Cleanup: split bdi_dirty_ratelimit with ifdef into separate macros
	* Fix: writeback instrumentation for 4.2 kernels
	* Fix: mm_page_alloc_extfrag instrumentation for kernel 3.18.10
	* Add stream instance id to the packet header
	* Add a packet sequence number
	* Fix: kmem probe with Ubuntu 3.13 kernels
	* Fix: disable kvm probe if lapic.h isn't found
	* Fix: timer instrumentation for 4.2 kernels
	* Fix: ext4 instrumentation for 4.2 kernels
	* Fix: kvm instrumentation for 4.2 kernels
	* Fix: allow LTTng to be built within kernel tree

2015-07-15 (Pet Fire Safety Day) LTTng modules 2.7.0-rc1
	* Fix: Building the event list fails on fragmented memory
	* Fix: use after free on metadata cache reallocation
	* Fix: version checks for kernel 4.0
	* Fix: Incorrect Ubuntu kernel patchlevel
	* Fix: cpu-id context should use int type
	* Implement cpu-id context
	* Implement cpu_id context for filtering
	* Fix: context printk mismatch on error
	* Cleanup: misleading comment about deferrable timer
	* Fix: arm-32 build
	* Fix: Update kmem event for Ubuntu's 3.16 kernel
	* Fix: RHEL 7.1 block instrumentation
	* Fix: add RHEL version macros
	* Fix: add missing parenthesis in ubuntu version check
	* Fix: remove regmap instrumentation for kernels < 4.1
	* Fix: Update kmem event for recent Ubuntu kernel
	* Fix: missing statedump end event when block device listing available
	* Fix: don't generate incorrect macros for debian/ubuntu version check
	* Revert "Fix: build against Ubuntu kernels"
	* Fix: build against Ubuntu kernels
	* Add namespace info in sched_fork and statedump
	* Fix: ext4 instrumentation: flags parameter did not exist prior to 3.11
	* Fix: printk instrumentation: remove "condition" tracepoints
	* Fix: regmap build against kernel 4.0 kernel headers
	* Add mmu_valid_gen field to mmutrace events
	* Fix: add missing x86 mmutrace kernel header include
	* Fix: x86 mmutrace event extra field for kernels >= 3.11
	* Fix: remove execute flag from kvm.h file
	* Fix: build x86 kvm probes on kernels >= 4.1-rc1
	* Fix: compilation on 4.1-rc1 kernel, remove unused WB_WORK_REASON
	* Fix: 4.1-rc1 Linux build and regmap instrumentation
	* Fix: don't clash with older Debian kernel versions
	* Fix: update get_pfnblock_flags_mask wrapper for debian kernels
	* Fix: discover Debian API
	* Fix: Update README.md to match reality: kernels >= 2.6.36 are supported
	* Fix: atomic.h wrapper for kernels < 2.6.37
	* Fix: disable x86 kvm instrumentation for kernels < 2.6.38
	* Fix: add missing types.h include for older kernels
	* Fix: add hlist lttng wrappers
	* Fix: add struct file_handle forward declaration
	* Fix: string length calculation reversed user vs kernel args
	* Fix: use lttng_rcu_dereference within lttng-syscalls.c
	* Fix: add lttng rcu wrapper to allow tracing RCU
	* Fix: double-unlock of session mutex
	* Fix: check that class and instance prototype match
	* Fix: lttng-events.h check function takes void
	* Fix: regmap instrumentation for Linux 3.19.4 and 4.0
	* Fix: kernels >= 2.6.33 put utsrelease.h in generated/
	* Fix: Include utsrelease.h in lttng-kernel-version.h
	* Fix: ext4 ext4_da_write_pages instrumentation for kernels < 3.11.0
	* Fix: old kernels need module.h included before vermagic.h
	* Fix: net instrumentation for kernels 2.6.39 and below
	* Fix: version condition in makefile
	* Implement wrapper around get_pfnblock_flags_mask
	* Be more restrictive in provider name check
	* Fix: net instrumentation namespacing
	* Fix: compaction instrumentation namespacing
	* Fix: Support 4.x kernel versions in Makefile
	* Fix: remove stale TP_STRUCT_entry from kvm instrumentation
	* Fix: add missing module.h include to lttng-probe-user.c
	* Fix: use lttng hlist wrapper in wildcard and filter
	* Fix: namespace asoc and kmem instrumentation
	* Fix: update instrumentation after wildcard rebase
	* Fix: lttng_abi_syscall_list does not need to be exported
	* Migrate ARM, powerpc, MIPS syscall instrumentation to TP_FIELDS
	* Remove now unused syscalls.h from lttng-modules
	* Filter: start with enabler "disabled"
	* Fix coverity warning about sizeof(void **) != sizeof(void *)
	* Fix length type and text sequence base
	* Fix: TP_FIELDS: add missing headers
	* Migrate syscall instrumentation to TP_FIELDS
	* Migrate tracepoint instrumentation to TP_FIELDS
	* Implement filtering infrastructure
	* syscall wildcards: apply syscall filtering
	* Implement syscall wildcard support
	* Implement tracepoint wildcard support
	* Namespace all tracepoints
	* Implement list.h wrapper for hlist in older kernels
	* Implement listing of pid tracker content
	* Implement PID tracking
	* Fix: mm_page_alloc_extfrag instrumentation for kernel 3.14.36
	* Fix: update writeback instrumentation for kernel 4.0+
	* Fix: compaction mm_compaction_isolate_template update for Linux 4.0+
	* Fix: kmem instrumentation update for mm_page_alloc_extfrag kernel 3.19.2+
	* Fix: kmem instrumentation: mm_page_alloc extfrag change_ownership field
	* Fix: missing parenthesis in offset_align_floor
	* Fix: implement time.h wrapper for FD_ISSET
	* Fix: update sched instrumentation for 3.19+ kernels
	* Fix: update rcu instrumentation for 3.19+ kernels
	* Fix: update scsi instrumentation for 3.19+ kernels
	* Fix: update module instrumentation for 3.19+ kernels
	* Fix: Add f_dentry wrapper for 3.19+ kernels
	* Fix: introduce lttng_get_unused_fd() wrapper for 3.19 kernels
	* Fix: lttng_this_cpu_ptr wrapper for kernel 3.19+
	* Fix: Update btrfs instrumentation for 3.18 Linux kernel
	* Fix compile error on kernel 3.0.101 with CONFIG_PERF_EVENTS
	* Conditional compilation introduced by lttng-modules commit
	* Fix: compaction instrumentation update for 3.14.x stable kernels
	* Fix: context alignment not properly handled
	* Fix compilation on Linux kernel >= 3.18.0
	* Fix: build for architectures without HAVE_SYSCALL_TRACEPOINTS

2014-10-20 LTTng modules 2.6.0-rc1
	* Expose lttng-modules ABI version ioctl
	* Fix: syscall list ioctl number conflict
	* lttng-modules: fix build for non-x86
	* Fix: syscall listing of session
	* Print build warning when writeback probe is disabled
	* Add atomic.h wrapper for before/after atomic
	* Fix compilation on Ubuntu 14.10
	* Fix: export name as text array in writeback
	* Cleanup: remove unused trace_clock_read32()
	* Use 3.17 ktime_get_mono_fast_ns() new API
	* Check for stale version.h files
	* Fix: compile lttng_statedump_process_ns on Ubuntu
	* Reverse version check logic in lttng_statedump_process_ns
	* Fix block_rq_complete TP on Ubuntu kernel
	* Introduce macros to check Ubuntu kernel version
	* Sync writeback tracepoints from mainline
	* Fix: redefinition of DEFINE_WRITEBACK_EVENT
	* Fix: hander negative get_syscall_nr return value
	* Fix: statedump: close_on_exec flag backward compat
	* Fix instrumentation of vmscan for older kernels
	* Fix: older kernels (3.2.x) don't undefine TRACE_SYSTEM
	* Fix: syscall listing: handle "enable all syscall"
	* Fix: don't allow disabling syscalls when none are enabled
	* Fix: syscall: fail disable all if all already disabled
	* Fix: syscall filtering: NULL pointer deref
	* Cleanup: list syscall without syscall_entry prefix
	* Fix: syscall_list_show NULL pointer deref
	* implement syscall mask getter
	* Cleanup: lttng-abi.h coding style
	* syscall listing: show syscall ID
	* Allow events with same name to be enabled for each channel
	* ABI: use enable a syscall ABI field name
	* Implement syscall listing
	* Fix: tracepoint list anonymous file name
	* Fix: syscall filtering: disable all syscalls
	* syscall tracing: input/output parameter handling for all arch
	* lttng-get-syscall-inout.sh depends on bash
	* Fix generate syscall header script: add missing escape char
	* syscall instrumentation: handle copy_from_user return value
	* Rename LTTng syscall instrumentation macros
	* Rename LTTng instrumentation macros
	* Extract input/output arguments from accept and connect syscalls
	* syscall: extract pipe and pipe2 output args
	* Remove sys_ prefix from syscall names
	* System call inout/output arg processing
	* Update syscall inout table
	* Add syscall inout table
	* Extract syscall exit ret value on x86 32/64
	* Extract system call exit return value
	* Syscall filtering: apply to syscall exit
	* System call filtering
	* asoc.h: fix build with v3.17 kernel
	* Fix: lttng-modules teardown NULL pointer OOPS
	* Fix: handle concurrent flush vs get_next_subbuf on metadata cache
	* Modernize README using Markdown
	* Fix: OOT lttng_logger tracepoint not visible with signed kernels
	* Add cscope to gitignore
	* Update kvm instrumentation: compile on 3.17-rc1
	* Update statedump to 3.17 nsproxy locking
	* Fix: noargs probes should calculate alignment and event length
	* Update compaction instrumentation to 3.16 kernel
	* Update vmscan instrumentation to 3.16 kernel

2014-07-16 (Take Your Poet to Work Day) LTTng modules 2.5.0
	* (no change)

2014-06-27 LTTng modules 2.5.0-rc2
	* Fix: statedump: check whether "files" is NULL, RCU semantic fix
	* Fix: statedump handle oom case, handle errors
	* Fix: correct typo in kernel version number
	* Fix: blktrace instrumentation for backported branches
	* Fix: statedump block devices OOPS

2014-05-28 (International Hamburger Day) LTTng modules 2.5.0-rc1
	* Add TID field to some block_* events
	* Fix: refuse overwrite mode buffers with less than two subbuffers
	* Fix: lttng modules system call generation script
	* Dump FD flags and mode on state dump
	* Fix: incorrect rwbs field type in block_bio_queue
	* Fix: blktrace instrumentation for v3.2.58+ stable branch
	* Fix: pass proper args when writing commit counter
	* Cleanup: lib ringbuffer: pagecpy has unsigned semantic
	* Fix: allow racy tracepoint string input from kernel and userspace
	* Statedump event for block devices
	* Fix: update v4l2 instrumentation to 3.15 kernel
	* Fix: ext4 update instrumentation to 3.15 kernel
	* Fix: update block instrumentation to 3.15 kernel
	* Fix: module instrumentation: update to 3.15 kernel
	* Adapt to 3.15 tracepoint API
	* Kernel 3.15 don't define map unmap for pipe
	* Fix: add missing module version in v4l2 probe
	* Add V4L2 instrumentation
	* Fix: rcu instrumentation: add const qualifier to char pointers
	* Fix: add missing module version information
	* Use kernel 3.13 syscall tables for MIPS32
	* Add MIPS32 syscalls extracted from a 3.13 kernel
	* Fix: block instrumentation: < 3.14 don't have bi_iter
	* Fix: update btrfs instrumentation to kernel 3.14
	* Fix: update block layer instrumentation to kernel 3.14
	* Fix: remove __exit annotation
	* Fix file permissions for lttng-statedump-impl.c
	* LTTng logger ABI

2014-02-28 (Public Sleeping Day) LTTng modules 2.4.0
	* Fix: load state dump even if work-around lookup fails
	* Cleanup: fix comment
	* Fix: correctly version kvm events to build against v3.0 kernel
	* Add extraversion (e.g. -rc4) to lttng-tracer modinfo

2014-02-14 LTTng modules 2.4.0-rc4
	* Fix: use after free in ring buffer clients
	* Fix: Add statedump exit so module is not permanent
	* Cleanup: move callback init to static initialization
	* Fix: OOT lttng-statedump tracepoints not visible with signed kernels

2014-01-29 LTTng modules 2.4.0-rc3
	* Fix: tracepoint event name mapping at unregister
	* Fix: tracepoint name remapping
	* Fix: enable event error path memory corruption
	* Update kvm instrumentation to Linux 3.13
	* Update sched instrumentation to Linux 3.13
	* Fix: provide more precise error report for enable event
	* Fix: quote event name in metadata
	* Add version info to lttng-tracer.ko modinfo

2013-12-10 LTTng modules 2.4.0-rc2
	* Fix: client_packet_header() uses wrong packet
	* Cleanup: fix typo in ring buffer backend comment
	* Fix: handle unknown event type parameter
	* Fix: eliminate timestamp overlap between packets
	* gcc blacklist: only apply when building with gcc
	* Blacklist ARM gcc 4.8.0, 4.8.1, 4.8.2

2013-11-15 LTTng modules 2.4.0-rc1
	* Update ext4 instrumentation to Linux 3.12
	* Update RCU instrumentation to Linux 3.12
	* Update btrfs instrumentation to 3.12 kernel
	* Update vmscan instrumentation to Linux 3.12
	* update: kmem instrumentation 3.12 kernel support
	* lttng-statedump-impl: Use generic hard irqs for Linux >= 3.12
	* lttng-statedump-impl: Fix lttng_list_interrupts for empty implementation
	* Import fix from LTSI: 3.4+ RT kernels use CONFIG_PREEMPT_RT_FULL
	* Add new tracepoint in KVM
	* Blacklist kernels 3.10.13 and 3.11.2
	* LTTng trace-clock: shrink kernel blacklist
	* Metadata flush writes data from the cache
	* Per-stream ioctl to get the current timestamp
	* LTTng ringbuffer ABI calls for index generation
	* Prepare LTTng override of ring buffer fops
	* Blacklist Linux kernels 3.10+

2013-09-03 LTTng modules 2.3.0
	* Fix: metadata stream should not reference session
	* Fix: btrfs: support 3.11 Linux kernel
	* statedump: remove KERN_DEBUG messages
	* Fix: ext4: add missing tracepoints for 3.11 kernel
	* Fix: ext4: Linux 3.11 support
	* Fix: ext3: 3.11 Linux support
	* Fix: statedump nsproxy 3.11 Linux support

2013-08-30 LTTng modules 2.3.0-rc2
	* Fix: metadata lttng channel refcount
	* README: lttng-modules incompatible with lttng 0.x patchset

2013-07-17 LTTng modules 2.3.0-rc1
	* Fix: kvm x86 probes side-effect
	* Fix: allow get/put subbuf in loop for metadata stream
	* Add support for kvm x86 specific tracepoints
	* Add mainline headers for kvm x86 tracepoints
	* Remove old 3.0.4 x86-64 extracted syscall info
	* Point the x86-64 overrides to newly extracted 3.10-rc7 files
	* Add syscalls extracted files from a 3.10-rc7 kernel
	* Improve documentation of the syscall extractor script
	* Fix: double length of __dynamic_len array
	* Fix printk instrumentation
	* Introduce __dynamic_array_enc_ext_2() and tp_memcpy_dyn_2()
	* Fix: ring buffer: get_subbuf() checks should be performed on "consumed" parameter
	* Fix: SWITCH_FLUSH new sub-buffer checks
	* Fix: ring buffer: handle concurrent update in nested buffer wrap around check
	* Cleanup: lib_ring_buffer_switch_new_end() only calls subbuffer_set_data_size()
	* Revert "Cleanup: ring buffer: remove lib_ring_buffer_switch_new_end()"
	* Fix: handle writes of length 0
	* Fix: ring buffer: RING_BUFFER_FLUSH ioctl buffer corruption
	* Cleanup: ring buffer: remove lib_ring_buffer_switch_new_end()
	* print warning and return -EBUSY on double get_subbuf()
	* Add header to fix compilation of syscalls-extractor on 3.9 kernel
	* Fix: don't do 0 byte event reservation
	* Document that payload size need to be greater than 0
	* Fix build and load against linux-2.6.33.x
	* Fix: add missing CONFIG_COMPAT around lib_ring_buffer_compat_ioctl
	* Metadata cache and multiple metadata channels
	* fix block instrumentation probe signature mismatch for 3.9.x kernels
	* fix: block instrumentation: NULL pointer dereference
	* Update rcu instrumentation to 3.9.[0-4]
	* Fix CPU hotplug section mismatches
	* Add system calls definitions for powerpc-32
	* Remove bashism in lttng-syscalls-generate-headers.sh
	* Update ARM (32 bit) syscall tracepoints to 3.4

2013-05-09 LTTng modules 2.2.0-rc2
	* Remove useless lttng_metadata probe
	* Fix: warning kvm_trace_exit_reason redefined for 3.9 kernel
	* Fix: 3.9.0 block layer instrumentation build
	* Revert "Stop build if CONFIG_TRACEPOINTS is not set"
	* Stop build if CONFIG_TRACEPOINTS is not set
	* Add comments to endifs.
	* Fix: remove ARM set_tls system call override
	* Cleanup: arm sys_mmap whitespace
	* Clean up using global_dirty_limit wrapper for writeback probe

2013-03-29 LTTng modules 2.2.0-rc1
	* Update README
	* Fix: vmscan instrumentation build
	* writeback instrumentation: remove duplicated structures
	* block: update instrumentation to 3.9 rc kernel
	* rcu: update to 3.9 rc kernel instrumentation
	* workqueue instrumentation: remove duplicated structures
	* Rename odd event names
	* Introduce API to remap event names exposed by LTTng
	* lttng-module: sched.h: Fix compilation on 3.9 kernel
	* Fix Linux 3.8 btrfs probe warning
	* Fix Linux 3.8 ext4 probe support
	* Fix 3.8 kernel support: namespace lttng_is_signed_type()
	* Fix: don't flush-final for offset 0 if reader is on sub-buffer
	* instrumentation sched: add missing fork pid info
	* Fix check in lttng_strlen_user_inatomic
	* instrumentation: sync with Linux commit a1ce392
	* Fix: statedump: missing locking, use lttng_iterate_fd
	* Implement lttng_iterate_fd wrapper
	* Instrumentation cleanup: kmem events should print hex pointers
	* Fix compilation of ext4 and btrfs tracepoints on 2.6.40 kernels
	* Fix: statedump hang/too early completion due to logic error
	* Fix: statedump hang due to incorrect wait/wakeup use
	* put_ulong calls in lib_ring_buffer_compat_ioctl() should be compat
	* wrapper/perf.h: Fix kernel version condition
	* Add new kernel probes instrumentation
	* Update kernel probes to more detailed match to kernel versions
	* Fix possible kernel build errors with linux-patches
	* Add missing MIT license text to 3 files under this license
	* Update sites using kernel version checking macro to new range
	* Make upper bound of kernel version checking macro exclusive
	* sock instrumentation: fix fields to get referenced values
	* ext3 instrumentation: fix of assignment code conversion
	* sched instrumentation: rename "pid" fields in sched_process_exec
	* Remove remaining semicolons in TP_fast_assign blocks
	* Fix compilation for 3.0 kernels that are named 2.6.40
	* Fix compilation for 3.0 branch (>= 3.0.39)
	* Add kernel version checking macro
	* Remove semicolons in TP_fast_assign blocks
	* Add ifdefs to net probe to support Linux 2.6.39
	* Add kernel probes for supplementary subsystems
	* Check if interrupt action name is not null in statedump
	* Fix exec instrumentation: only for kernels 3.4.0 and higher
	* Add TRACE_EVENT(sched_process_exec) to sched.h
	* lib/ringbuffer/frontend_api.h: Include linux/prefetch.h.
	* Fix warning with 3.6.0 kernel
	* ABI with support for compat 32/64 bits
	* Perform calculation on bit size in 64-bit
	* Use uint64_t for packet header content size and packet size
	* Fix: compat layer only on supported architectures
	* Fix ring buffer 32/64 bits compat
	* Fix cleanup: move lttng-tracer-core.h include to lib ringbuffer config.h
	* Fix ring_buffer_frontend.c: missing include lttng-tracer-core.h
	* Fix: statedump missing check for NULL namespace

2012-09-10 LTTng modules 2.1.0-rc1
	* fix timestamps on architectures without CONFIG_KTIME_SCALAR
	* Support for linux kernels 2.6.32 through 2.6.37
	* Document limitation of vppid and ppid context wrt eventual RCU instrumentation
	* Cleanup: no need to hold RCU read-side lock when reading current nsproxy
	* Add env hostname information
	* Fix: lttng_statedump_process_state for each PID NS has infinite loop
	* lttng_statedump_process_state for each PID NS
	* Support the hostname context
	* Fix: statedump namespaced pid, tid and ppid
	* Fix: statedump: disable vm maps enumeration
	* Fix: ensure userspace accesses are done with _inatomic
	* Fix: vppid context should test for current nsproxy
	* Add MIPS system call support
	* Change mode of lttng-syscalls-generate-headers.sh to 755
	* cleanup: fix typo in syscall instrumentation header
	* Cleanup: remove trailing whitespace in README
	* trace event: introduce TP_MODULE_NOAUTOLOAD and TP_MODULE_NOINIT
	* LTTng: probe-statedump: add #include <linux/sched.h>
	* fix: signal_generate event should print utf8 for comm field
	* Makes write operation a parameter for tp_memcpy macro
	* Add coding style document
	* Update instrumentation/events README file
	* Add makefile target for preprocessor
	* Fix: free_event_id check should compare unsigned int with -1U
	* Use unsigned long type for events discarded counter
	* Fix: update signal instrumentation for 3.4 kernel
	* LTTng Modules ARM syscall instrumentation
	* Fix: generate header missing echo -e for escape chars
	* Fix: add missing uaccess.h include (for ARM)
	* README: Document that CONFIG_MODULES is required
	* Fix: README typo
	* Fix: document required and optional kernel config options in README

2012-03-29 LTTng modules 2.0.1
	* Fix: is_compat_task !CONFIG_COMPAT compile error on kernels >= 3.3

2012-03-20 LTTng modules 2.0.0
	* First STABLE version
	* Add version name

2012-03-20 LTTng modules 2.0.0-rc4
	* Update README and add version name place-holder

2012-03-16 LTTng modules 2.0.0-rc3
	* Fix clock offset 32-bit multiplication overflow
	* Fix : wrong assign of fd in state dump
	* License cleanup, ifdef namespace cleanup
	* Fix: ensure power of 2 check handles 64-bit size_t entirely

2012-03-02 LTTng modules 2.0.0-rc2
	* Fix: dmesg printout should not print metadata warnings
	* Fix: use transport name as channel name
	* Fix: Return -EINVAL instead of print warning if non power of 2 size/num_subbuf

2012-02-20 LTTng modules 2.0.0-rc1
	* Standardize version across toolchain
	* statedump: Use old macro name for kernel 2.6.38

2012-02-16 LTTng modules 2.0-pre15
	* Add timer instrumentation
	* fix: need to undef mainline define
	* fix: Include signal.h instead of irq.h for prototype match check
	* Add signal instrumentation

2012-02-16 LTTng modules 2.0-pre14
	* syscall tracing: sys_getcpu
	* Add sys_clone x86 instrumentation
	* statedump: fix include circular dep
	* Implement state dump

2012-02-09 LTTng modules 2.0-pre13
	* Update README
	* environment: write sysname, release, version, domain to metadata
	* Allow open /proc/lttng for read & write

2012-02-02 LTTng modules 2.0-pre12
	* Add x86 32/64 execve syscall instrumentation override
	* Remove unused defines
	* Add padding to ABI
	* Use LTTNG_KERNEL_SYM_NAME_LEN
	* Update version to 1.9.9
	* Add missing double-quotes to clock uuid
	* clock: read bootid as clock monotonic ID
	* Fix comment
	* Cleanup comment
	* clock: output clock description in metadata
	* Properly fix the timekeeping overflow detection
	* Fix init bug
	* rename lib-ring-buffer to lttng-lib-ring-buffer
	* Remove #warning
	* Mass rename: ltt_*/ltt-* to LTTNG_*/LTTNG-*
	* Update TODO
	* Update TODO
	* Remove debugfs file (keep only proc file)
	* Rename lttng-debugfs-abi files to lttng-abi

2011-12-13 LTTng modules 2.0-pre11
	* Fix OOPS caused by reference of config pointer
	* Gather detailed info from x86 64 32-bit compat syscall instrumentation
	* lttng lib: ring buffer move null pointer check to open
	* lttng lib: ring buffer remove duplicate null pointer
	* lttng lib: ring buffer: remove stale null-pointer
	* lttng wrapper: add missing include to kallsyms wrapper
	* lttng: cleanup one-bit signed bitfields
	* Add TODO file
	* Update symbol name length max size to 256
	* Fix last modifications to string_from_user operations
	* Document that depmod needs to be executed by hand
	* Fix strlen_user fault space reservation
	* Fix tp_copy_string_from_user handling of faults
	* Disable block layer tracing support for kernels < 2.6.38
	* lttng context: perf counter, fix 32-bit vs 64-bit field size bug
	* Update trace clock warning to match the current development plan
	* ringbuffer: make ring buffer printk less verbose
	* Makefile: do not run depmod manually

2011-09-30 LTTng modules 2.0-pre10
	* x86-32: override sys_mmap syscall instrumentation
	* Fix cast warning

2011-09-29 LTTng modules 2.0-pre9
	* x86 32 syscalls: fix !CONFIG_UID16
	* Use __string_from_user
	* Add __string_from_user
	* Rename "comm" context to "procname"
	* Fetch "type" name field for mount syscall
	* Create common override file for all architectures
	* Shrink stack size usage
	* Cleanup: remove unused lttng-compat-syscalls.c file
	* Support detailed compat syscalls on x86_64
	* Fix syscall table
	* Add disabled compat syscalls detail (work in progress)
	* Add config compat support for detailed x86_32 syscalls
	* Handle newer 3.1+ perf API
	* Add dummy x86-32 override headers
	* Bind x86-32 syscall headers
	* Add x86-32 syscall headers
	* Add check for KALLSYMS_ALL in syscall extraction script
	* Automate string extraction for syscalls
	* Automate syscall filename/pathname extraction
	* Add exit to ring_buffer_frontend so module is unloadable
	* Add sys_open filename (x86_64)
	* Add missing memcpy callback
	* copy_from_user and memset
	* Add missing alignment after header write
	* lib ring buffer: add frontend init as module_init
	* lib ring buffer frontend: add missing lock initialization
	* ARM: Set bit 0 for thumb mode in kallsyms_lookup_name returned address (missing file)
	* ARM: Set bit 0 for thumb mode in kallsyms_lookup_name returned address
	* Create override for sys_mmap
	* Rename syscalls -> syscall in LTTng ABI
	* Use different event name for compat syscalls
	* Allow trace syscall table override
	* Add dummy override files
	* syscall detail: add override capability
	* Add pointer pretty-print heuristics
	* Add __field_hex
	* Rename sys exit errno into ret
	* Enable detailed syscalls only for native x86_64
	* Use "unknown" for compat syscalls
	* Disable x86-64 specific detailed syscalls for now, until we deal with 32-bit compat
	* Fix syscall exit
	* Fix sys exit
	* Only enable detailed syscalls for x86_64 for now
	* Merge unknown syscall method with extended detail method
	* Add underscore prefix before event names
	* Add syscalls pointers detailed syscall tracing
	* Use perl for regexp
	* Support generation of syscall probes for those with pointers
	* Support detailed syscalls with 0 arguments
	* detailed syscall tracing (work in progress)
	* Expose /proc/lttng file
	* Implement detailed syscall event probe
	* Disable perf build for < 2.6.33 kernels
	* Syscall detail mode: generate syscall table
	* block instrumentation: write cmd as hex sequence
	* lttng-events TRACE_EVENT generator cleanup
	* block layer instrumentation: fix cmd field
	* Remove 0 args syscalls for now from type-aware syscall cb generator
	* Generate trace syscall table macros
	* Put syscall tracing without arg types back in place
	* Detailed system call tracing (TRACE_EVENT() generation for integer support)
	* lttng events probes: don't clash with "ctx" variable name
	* lib ring buffer must take private pointer copy before decrementing refcount

2011-08-16 LTTng modules 2.0-pre8
	* Fix metadata buffer wait/wakeup

2011-08-12 LTTng modules 2.0-pre7
	* Add missing module refcount to lttng_tracepoint_list_fops
	* Add license info about lib/ringbuffer/ring_buffer_mmap.c being GPLv2