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Subject[RELEASE] LTTng-modules 2.11.0-rc1 (Linux kernel tracer)
Hi,

Here is the first release candidate of LTTng modules 2.11 Linux kernel
tracer.

This release is named after a modern Saison beer from Montréal's Oshlag
microbrewery. It is a refreshing, zesty, rice beer with hints of fruit and
spices. Some even say it makes for a great Somaek when mixed with Chamisul
Soju, not that we've tried!

Lafontaine is also a tongue-in-cheek reference to a water leak that
affected EfficiOS's offices during the development of this release.

The most notable features of this new release that apply to lttng-modules
are:

Session rotation
Dynamic user-space tracing with uprobes
User and kernel space call stack capture from the kernel tracer
Support for arrays and bitwise binary operators in filters

See the lttng-tools release tag for more information about this
features: https://github.com/lttng/lttng-tools/releases/tag/v2.11.0-rc1

Project website: http://lttng.org
Documentation: http://lttng.org/docs
Download link: http://lttng.org/download

Changelog:

2018-09-05 (Be Late for Something Day) LTTng modules 2.11.0-rc1
* Fix: uprobes: missing break in lttng_event_ioctl()
* Fix: ACCESS_ONCE was removed in 4.15, use READ_ONCE instead
* Fix: instruction pointer has different names across arch
* Fix: build failures when CONFIG_UPROBES is absent
* uprobe: Support multiple call sites for the same uprobe event
* uprobe: Receive file descriptor from session instead of path to file
* uprobe: Mark uprobe event as registered
* Add uprobes support
* Fix: adjust SLE version ranges to build with SP2 and SP3
* Fix: Allow alphanumeric characters in SLE version
* Fix: Adjust range for SuSE 4.4.103-92 kernels
* Cleanup: move to kernel style SPDX license identifiers
* Cleanup: move scripts to subdirectory
* Cleanup: modinfo keys
* Add extra version information framework
* Revert "Add btrfs file item tracepoints"
* Fix: btrfs: Remove unnecessary fs_info parameter
* Fix: btrfs: use fs_info for btrfs_handle_em_exist tracepoint
* Fix: asoc: Remove snd_soc_cache_sync() implementation
* Fix: asoc: fix printing jack name
* Fix: asoc: Consolidate path trace events
* Fix: ASoC level IO tracing removed upstream
* Enable userspace callstack contexts only on x86
* Prevent re-entrancy in callstack-user context
* Callstack context: bump number of entries to 128
* Fix: callstack context alignment calculation
* Cleanup callstack context
* Fix callstack context: write empty sequence if no stack trace
* Fix: callstack context: false-sharing, bad memory size allocation
* callstack context: use delimiter when stack is incomplete
* Cleanup callstack context
* Add kernel and user callstack contexts
* Assign CPU id before saving the context size
* Define max nesting count constant
* Compute variable sized context length
* Pass arguments for context size computation
* Add 9p probe
* Update delayed ref tracepoints for v3.12
* Add btrfs file item tracepoints
* Add btrfs tracepoint for em's EEXIST case
* Fix: dyntick field added to trace_rcu_dyntick in v4.16
* Fix: BUILD_BUG_ON with compile time constant on < v2.6.38
* Fix: lttng filter validator ERANGE error handling
* Fix: filter interpreter: use LTTNG_SIZE_MAX
* Filter: add FILTER_OP_RETURN_S64 instruction
* Perform bitwise ops on unsigned types
* Filter: catch shift undefined behavior
* Filter: add lshift, rshift, bit not ops
* Filter: index array, sequences, implement bitwise binary operators
* Fix: pid tracker should track "pgid" for noargs probes
* lttng-tp-mempool: perform node-local allocation
* Fix: update RCU instrumentation for 4.17
* Fix: sunrpc instrumentation for 4.17
* Fix: use struct reclaim_stat in mm_vmscan_lru_shrink_inactive for 4.17
* Fix: Add gfp_flags arg to mm_vmscan_kswapd_wake for 4.17
* Update: kvm instrumentation for ubuntu 4.13.0-38
* Fix: update kvm instrumentation for Ubuntu 3.13.0-144
* Fix: btrfs instrumentation namespacing
* Cleanup: comment about CONFIG_HOTPLUG_CPU ifdef
* Fix: do not use CONFIG_HOTPLUG_CPU for the new hotplug API
* Fix: update kvm instrumentation for 4.1.50+
* Use the memory pool instead of kmalloc
* Create a memory pool for temporary tracepoint probes storage
* Fix: use proper pid_ns in the process statedump
* Fix: add variable quoting to shell scripts
* Update: kvm instrumentation for fedora 4.14.13-300
* Fix: Add Fedora version macros
* Add preemptirq instrumentation
* Clean-up: fix stale #endif comments
* Command to dump the metadata cache again
* Add a new /dev/lttng-logger interface
* Fix: update btrfs instrumentation for SuSE 4.4.114-92
* Fix: update block instrumentation for SuSE 4.4.114-92
* Fix: update rcu instrumentation for v4.16
* Fix: update vmscan instrumentation for v4.16
* Fix: update timer instrumentation on 4.16 and 4.14-rt
* Update kvm instrumentation for debian kernel 4.14.0-3
* Fix: network instrumentation protocol enum
* Fix: update btrfs instrumentation for SuSE 4.4.103-6
* Fix: update block instrumentation for SuSE 4.4.73-5
* Fix: global_dirty_limit for kernel v4.2 and up
* Fix: network instrumentation handling of corrupted TCP headers
* Fix: add missing uaccess.h include from kstrtox.h wrapper
* Update: kvm instrumentation for 4.14.14+, 4.9.77+, 4.4.112+
* Fix: btrfs_delayed_ref_head was unwired since v3.12
* Update kvm instrumentation for debian kernel 4.9.65-3
* Fix: debian kernel version parsing
* Fix: block instrumentation 4.14+ NULL pointer dereference
* Update: kvm instrumentation for 3.16.52 and 3.2.97
* Fix: kvm instrumentation for 4.15
* Update sock instrumentation for 4.15
* Update kvm instrumentation for 4.15
* Fix: ACCESS_ONCE() removed in kernel 4.15
* Fix: sched instrumentation on stable RT kernels
* timer API transition for kernel 4.15
* Fix: Don't nest get online cpus
* Fix: lttng_channel_syscall_mask() bool use in bitfield
* Fix: update kmem instrumentation for kernel 4.15
* Fix: lttng_kvmalloc helper NULL pointer OOPS
* Update version to 2.11.0-pre
* Fix: lttng-logger get_user_pages_fast error handling
* Fix: update block instrumentation for 4.14 kernel
* Revert "Fix: update block instrumentation for kernel 4.14"
* Fix: version check error in btrfs instrumentation
* Fix: update btrfs instrumentation for kernel 4.14
* Fix: update writeback instrumentation for kernel 4.14
* Fix: update block instrumentation for kernel 4.14
* Fix: vmalloc wrapper on kernel < 2.6.38
* Fix: vmalloc wrapper on kernel >= 4.12
* Add kmalloc failover to vmalloc
* Fix: mmap: caches aliased on virtual addresses
* Fix: update ext4 instrumentation for kernel 4.13
* Fix: Sleeping function called from invalid context
* Fix: sched for v4.11.5-rt1
* Make vim users life easier
* Rename Makefile.ABI.workarounds to Kbuild.common
* Fix: handle missing ftrace header on v4.12
* Fix: pid tracker should track "pgid"
* Cleanup: typo in lttng pid tracker
* Fix: Build ftrace probe on kernels prior to 4.12
* Fix: update ftrace probe for kernel 4.12
* Fix: update block instrumentation for kernel 4.12
* Calculate context length outside of retry loop
* Fix: Add support for 4.9.27-rt18 kernel
* Fix: update btrfs instrumentation for kernel 4.12
* Fix: update ringbuffer for kernel 4.12
* Fix: update sched instrumentation for kernel 4.12
* Fix: ext3 was completely removed from the kernel in v4.3
* Fix: NULL pointer dereference of THIS_MODULE with built-in modules
* Fix: add "flush empty" ioctl for stream intersection
* Revert "Fix: flush empty packets on snapshot channel"
* Revert "Fix: don't perform extra flush on metadata channel"

--
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com

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