Messages in this thread | | | Date | Fri, 8 Feb 2013 19:03:48 +0100 | From | Oleg Nesterov <> | Subject | [GIT PULL] uprobes/perf: pre-filtering |
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OK, nobody has comments. Ingo, please pull from
git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc uprobes/core
Changes: - fix the conflict with d24d7dbf which added the (unsafe) check into create_trace_uprobe()
- drop "Kill the "uprobe != NULL" check in uprobe_unregister()", the same patch from Sasha Levin was already applied as c91368c4
- drop "perf: Ensure we do not free event->parent before event" http://marc.info/?l=linux-kernel&m=136000475509419
Currently it is not necessary and it wasn't reviewed. But perhaps I'll resend it later.
Simple performance test:
# time perl -e 'syscall -1 for 1..100_000' real 0m0.040s user 0m0.027s sys 0m0.010s
# perf probe -x /lib/libc.so.6 syscall # perf record -e probe_libc:syscall sleep 100 &
Before this series:
# time perl -e 'syscall -1 for 1..100_000' real 0m1.714s user 0m0.103s sys 0m1.607s
After: real 0m0.037s user 0m0.013s sys 0m0.023s
The untraced process is not penalized.
Josh Stone (1): uprobes: Add exports for module use
Oleg Nesterov (37): uprobes: Move __set_bit(UPROBE_SKIP_SSTEP) into alloc_uprobe() uprobes: Kill the pointless inode/uc checks in register/unregister uprobes: Kill uprobe_consumer->filter() uprobes: Introduce filter_chain() uprobes: _unregister() should always do register_for_each_vma(false) uprobes: _register() should always do register_for_each_vma(true) uprobes: Introduce uprobe->register_rwsem uprobes: Change filter_chain() to iterate ->consumers list uprobes: Kill UPROBE_RUN_HANDLER flag uprobes: Kill uprobe->copy_mutex uprobes: Kill uprobe_events, use RB_EMPTY_ROOT() instead uprobes: Introduce uprobe_is_active() uprobes: Kill uprobes_mutex[], separate alloc_uprobe() and __uprobe_register() uprobes: Rationalize the usage of filter_chain() uprobes: Reintroduce uprobe_consumer->filter() uprobes: Teach handler_chain() to filter out the probed task uprobes/x86: Change __skip_sstep() to actually skip the whole insn uprobes: Change handle_swbp() to expose bp_vaddr to handler_chain() uprobes: Move alloc_page() from xol_add_vma() to xol_alloc_area() uprobes: Fold xol_alloc_area() into get_xol_area() uprobes: Turn add_utask() into get_utask() uprobes: Do not play with utask in xol_get_insn_slot() uprobes: Fix utask->xol_vaddr leak in pre_ssout() uprobes: Do not allocate current->utask unnecessary uprobes: Kill the bogus IS_ERR_VALUE(xol_vaddr) check uprobes/tracing: Fix dentry/mount leak in create_trace_uprobe() uprobes/tracing: Fully initialize uprobe_trace_consumer before uprobe_register() uprobes/tracing: Ensure inode != NULL in create_trace_uprobe() uprobes/tracing: Introduce is_trace_uprobe_enabled() uprobes/tracing: Kill uprobe_trace_consumer, embed uprobe_consumer into trace_uprobe uprobes/perf: Always increment trace_uprobe->nhit perf: Introduce hw_perf_event->tp_target and ->tp_list uprobes: Introduce uprobe_apply() uprobes/perf: Teach trace_uprobe/perf code to track the active perf_event's uprobes/perf: Teach trace_uprobe/perf code to pre-filter uprobes/perf: Teach trace_uprobe/perf code to use UPROBE_HANDLER_REMOVE uprobes/perf: Avoid uprobe_apply() whenever possible
arch/x86/kernel/uprobes.c | 4 +- include/linux/perf_event.h | 9 +- include/linux/uprobes.h | 23 ++- kernel/events/core.c | 5 +- kernel/events/uprobes.c | 465 +++++++++++++++++++++++-------------------- kernel/ptrace.c | 6 + kernel/trace/trace_probe.h | 1 - kernel/trace/trace_uprobe.c | 217 +++++++++++++++----- 8 files changed, 456 insertions(+), 274 deletions(-)
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