From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946880Ab3BHSFh (ORCPT ); Fri, 8 Feb 2013 13:05:37 -0500 Received: from mx1.redhat.com ([209.132.183.28]:14577 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1946702Ab3BHSFf (ORCPT ); Fri, 8 Feb 2013 13:05:35 -0500 Date: Fri, 8 Feb 2013 19:03:48 +0100 From: Oleg Nesterov To: Ingo Molnar Cc: Anton Arapov , Arnaldo Carvalho de Melo , Frank Eigler , Jiri Olsa , Josh Stone , Masami Hiramatsu , Srikar Dronamraju , Steven Rostedt , "Suzuki K. Poulose" , linux-kernel@vger.kernel.org Subject: [GIT PULL] uprobes/perf: pre-filtering Message-ID: <20130208180348.GA11280@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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(-)