From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0BB1423D281; Sun, 12 Apr 2026 20:10:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776024621; cv=none; b=CZh/0CQVFK5+B4v8zdlMojZkATpgJFZt6kk7Q0ACu/le6AdJh//P9ihPsPyp2LkGd07+oodBRreKVhr0n27braSqAiL+b4ZNOJ00w95yNzf+ptksmXfEFRXOG1wOBv1qHZ4uD/Pfvkan5Yyw8V7gaGPrzH0thJ3eib2Z1qqaRW4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776024621; c=relaxed/simple; bh=bIHWdfmMG35BbIpZo++0vZ/EUVbJCkMVzycWjQvdPWQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=H8SrNSQb2NL9k87Wo5YeOhbBk0Ih66wRWsG/GVL0Zop3kxuEKXY2+TGINyp8n1+URk0aWzKKmots6udS0QLHAYnO/ATLseeGUvV14gTKBh5hlXM2H0ljqFTWwkzW7YtPDOtHXR5EtPsQ8Cydc112G6ziS3GKknBUP9Vafppv9xU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IzGpc5Zf; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="IzGpc5Zf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 528E5C19424; Sun, 12 Apr 2026 20:10:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776024620; bh=bIHWdfmMG35BbIpZo++0vZ/EUVbJCkMVzycWjQvdPWQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=IzGpc5Zf6gC+G1I72p/Hasngkm5vaJTQ402U5fqbhOVROZ2H4cUuz647MyMv/tkbH R5tQ5oX9pLsijTKhbR0J026Yw0g1Dpjz69ag2mgNE/swDbsYJMA6ro11u1JS/VuAVx sXmMxsb1x7nDUvOpezUJUnupo4LRP8TCelCpOh5Oa7q5HwMrmBvF541gLnqsRDD+1Q Fmm+6KV9QBlcIm2VtS10Lj9cE41yVaVFkvcSMHXIwHipHURJdvGrav9hpHf4hh/2bi LHu7KLFlFY2+ssLcAC+YCCygVrQyMawumPf4/7CGuO6v3F+AseXYHgPOBsgSiZbaJu qKBKwYCuwYTDQ== Date: Sun, 12 Apr 2026 13:10:17 -0700 From: Namhyung Kim To: Ian Rogers Cc: acme@kernel.org, adrian.hunter@intel.com, ajones@ventanamicro.com, ak@linux.intel.com, alex@ghiti.fr, alexander.shishkin@linux.intel.com, anup@brainfault.org, aou@eecs.berkeley.edu, atrajeev@linux.ibm.com, blakejones@google.com, ctshao@google.com, dapeng1.mi@linux.intel.com, derek.foreman@collabora.com, dvyukov@google.com, howardchu95@gmail.com, hrishikesh123s@gmail.com, james.clark@linaro.org, jolsa@kernel.org, krzysztof.m.lopatowski@gmail.com, leo.yan@arm.com, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux@treblig.org, mingo@redhat.com, nichen@iscas.ac.cn, palmer@dabbelt.com, peterz@infradead.org, pjw@kernel.org, ravi.bangoria@amd.com, swapnil.sapkal@amd.com, tanze@kylinos.cn, thomas.falcon@intel.com, tianyou.li@intel.com, yujie.liu@intel.com, zhouquan@iscas.ac.cn Subject: Re: [PATCH v10 00/29] perf tool: Add evsel to perf_sample Message-ID: References: <20260411191710.524998-1-irogers@google.com> <20260412020833.641177-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20260412020833.641177-1-irogers@google.com> Hi Ian, On Sat, Apr 11, 2026 at 07:08:03PM -0700, Ian Rogers wrote: > Nearly all perf code ends up passing an evsel with the perf_sample, > which is problematic if you want to rewrite the evsel such as with > off-CPU processing - all uses of the evsel need fixing up. Previously > I'd mailed this patch as an RFC with everything combined: > https://lore.kernel.org/lkml/20260126071822.447368-1-irogers@google.com/ > and there was a request to break it up. > > v10: Changes to some of the bounds checks as prompted by Sashiko. > > v9: Clean up some error path nits caught by Sashiko and simple bound > checks Sashiko recommended. > https://lore.kernel.org/linux-perf-users/20260411191710.524998-1-irogers@google.com/ > > v8: Fix address sanitizer issues with kwork and move patches, along > with bound check additions, to end of series. > https://lore.kernel.org/linux-perf-users/20260411065718.372240-1-irogers@google.com/ > > v7: Separate out kwork work->name to a strdup into its own patch, now patch 4. > https://lore.kernel.org/linux-perf-users/20260408072601.210837-1-irogers@google.com/ > > v6: Address more Sashiko feedback. > https://lore.kernel.org/lkml/20260404034325.3172592-1-irogers@google.com/ > > v5: Address feedback from Sashiko and Namhyung. > https://lore.kernel.org/lkml/20260403204017.2919994-1-irogers@google.com/ > > v4: Fix more sashiko issues: bounds checks, memory safety, making > refactors better, inconsistent evsels, mmap2 buildid injection > choice of evsel, mismatched function arguments. > https://sashiko.dev/#/patchset/20260320080835.724836-1-irogers%40google.com > https://lore.kernel.org/lkml/20260320192627.368357-1-irogers@google.com/ > > v3: Fix various sashiko review comments particularly about unintended > behavior changes. > https://lore.kernel.org/lkml/20260320080835.724836-1-irogers@google.com/ > > v2: Add review feedback on the first 2 patches from Namhyung, fix a > missed evsel assignment running event2evsel in builtin-inject. > https://lore.kernel.org/lkml/20260319232334.287517-1-irogers@google.com/ > > v1: https://lore.kernel.org/lkml/20260209174032.4142096-1-irogers@google.com/ > > Ian Rogers (29): > perf sample: Fix documentation typo > perf tool: Remove evsel from tool APIs that pass the sample > perf kvm: Don't pass evsel with sample > perf evsel: Refactor evsel tracepoint sample accessors perf_sample > perf trace: Don't pass evsel with sample > perf callchain: Don't pass evsel and sample > perf lock: Only pass sample to handlers > perf lock: Constify trace_lock_handler variables > perf hist: Remove evsel parameter from inc samples functions > perf db-export: Remove evsel from struct export_sample > perf hist: Remove evsel from struct hist_entry_iter > perf report: Directly use sample->evsel to avoid computing from > sample->id > perf annotate: Don't pass evsel to add_sample > perf inject: Don't pass evsel with sample > perf kmem: Don't pass evsel with sample > perf kwork: Don't pass evsel with sample > perf sched: Don't pass evsel with sample > perf timechart: Don't pass evsel with sample > perf trace: Don't pass evsel with sample > perf evlist: Try to avoid computing evsel from sample > perf script: Don't pass evsel with sample > perf s390-sample-raw: Don't pass evsel or its PMU with sample > perf evsel: Don't pass evsel with sample > perf kmem: Add bounds checks to tracepoint read values > perf sched: Bounds check CPU in sched switch events > perf timechart: Bounds check CPU > perf evsel: Add bounds checking to trace point raw data accessors > perf kwork: Fix address sanitizer issues > perf kwork: Fix memory management of kwork_work I've picked the first 23 patches to tmp.perf-tools-next as the rest still has some issues. Also I've touched some commits to either remove some parts or split them into separate commits. Please take a look. Thanks, Namhyung > > tools/perf/builtin-annotate.c | 28 +- > tools/perf/builtin-c2c.c | 6 +- > tools/perf/builtin-diff.c | 5 +- > tools/perf/builtin-inject.c | 75 +++--- > tools/perf/builtin-kmem.c | 95 ++++--- > tools/perf/builtin-kvm.c | 22 +- > tools/perf/builtin-kwork.c | 253 +++++++++++------- > tools/perf/builtin-lock.c | 128 +++++---- > tools/perf/builtin-mem.c | 1 - > tools/perf/builtin-record.c | 3 +- > tools/perf/builtin-report.c | 38 ++- > tools/perf/builtin-sched.c | 188 ++++++------- > tools/perf/builtin-script.c | 22 +- > tools/perf/builtin-timechart.c | 170 +++++++----- > tools/perf/builtin-top.c | 19 +- > tools/perf/builtin-trace.c | 121 +++++---- > tools/perf/tests/hists_cumulate.c | 1 - > tools/perf/tests/hists_filter.c | 1 - > tools/perf/tests/hists_output.c | 1 - > tools/perf/tests/mmap-basic.c | 4 +- > tools/perf/tests/openat-syscall-tp-fields.c | 2 +- > tools/perf/tests/switch-tracking.c | 9 +- > tools/perf/util/annotate.c | 19 +- > tools/perf/util/annotate.h | 6 +- > tools/perf/util/bpf_kwork.c | 14 +- > tools/perf/util/build-id.c | 3 +- > tools/perf/util/build-id.h | 7 +- > tools/perf/util/callchain.c | 8 +- > tools/perf/util/callchain.h | 6 +- > tools/perf/util/data-convert-bt.c | 2 +- > tools/perf/util/data-convert-json.c | 5 +- > tools/perf/util/db-export.c | 13 +- > tools/perf/util/db-export.h | 3 +- > tools/perf/util/evsel.c | 94 ++++--- > tools/perf/util/evsel.h | 12 +- > tools/perf/util/hist.c | 26 +- > tools/perf/util/hist.h | 3 +- > tools/perf/util/intel-pt.c | 2 +- > tools/perf/util/intel-tpebs.c | 3 +- > tools/perf/util/jitdump.c | 2 +- > .../perf/util/kvm-stat-arch/kvm-stat-arm64.c | 19 +- > .../util/kvm-stat-arch/kvm-stat-loongarch.c | 17 +- > .../util/kvm-stat-arch/kvm-stat-powerpc.c | 17 +- > .../perf/util/kvm-stat-arch/kvm-stat-riscv.c | 17 +- > tools/perf/util/kvm-stat-arch/kvm-stat-s390.c | 20 +- > tools/perf/util/kvm-stat-arch/kvm-stat-x86.c | 70 ++--- > tools/perf/util/kvm-stat.c | 19 +- > tools/perf/util/kvm-stat.h | 18 +- > tools/perf/util/kwork.h | 11 +- > tools/perf/util/machine.c | 14 +- > tools/perf/util/machine.h | 3 - > tools/perf/util/s390-sample-raw.c | 31 ++- > tools/perf/util/sample.h | 2 +- > .../util/scripting-engines/trace-event-perl.c | 23 +- > .../scripting-engines/trace-event-python.c | 47 ++-- > tools/perf/util/session.c | 38 +-- > tools/perf/util/synthetic-events.c | 68 +++-- > tools/perf/util/synthetic-events.h | 2 - > tools/perf/util/tool.c | 4 +- > tools/perf/util/tool.h | 4 +- > tools/perf/util/trace-event-scripting.c | 5 +- > tools/perf/util/trace-event.h | 3 - > 62 files changed, 967 insertions(+), 905 deletions(-) > > -- > 2.53.0.1213.gd9a14994de-goog >