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 79EDA1C8606; Tue, 8 Jul 2025 02:00:50 +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=1751940050; cv=none; b=rbqn4Bv7YhYgneHv8op/Tx1sNJCrRw6sP+uTqFt6wstZ4KqpzsGvL6lz/UyhdzqCeAVHO3ezzQ2ijDDaClQYf/7QazRoBZqvgnD8lJtABZJCOAvqTodu2SNd8iqplNiJf4XXBiEePCgD4Qte3wlrKPp9XVOmPTQDI+ynm5qwL3s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751940050; c=relaxed/simple; bh=AIE1bYpSQl2sDdlrLBEu7VHTjeRI0UsChEr6022uLng=; h=Message-ID:Date:From:To:Cc:Subject; b=XjQmhicYV8exeQ+PCWEBmsT+VAQZJY7txF1gzisrnPz/ZNgol5TwJVl9S/BaYzMvZvTjNcpkuXBvtLvI6u64fEJ+k6bz5zYs6365uVdlISBq0hHDA3s7WtDWr1SVM/egr8DKxQvw6NDp5MLF90xjkA8J99+KSqp5nksc4r1t1Wg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=T6Z1voif; 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="T6Z1voif" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EE06CC4CEE3; Tue, 8 Jul 2025 02:00:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1751940050; bh=AIE1bYpSQl2sDdlrLBEu7VHTjeRI0UsChEr6022uLng=; h=Date:From:To:Cc:Subject:From; b=T6Z1voifSAnMTSG+iRKH3UQAe2bqZ0/pU4pxDBYSVOu7Gs7biMqUKPypYXZ+/dRtp Msn5/HceB6wYqaNTJKH+pEvrxTkrZh/OnGFbmVKL8xJ7/owi8OoCcDofDWpL4GMyic hoYJPh6Tp/2+KMDQggogauuV9/wLzQ45dwrk6xqFeDiD4Z5SphJE3AZGElqsaTpp+/ 0MqpX68tLwJVAsJuFS3ukMeZ9yutNEvHtxGrKoLrYjkMnemTPQESG1MandHTjur/4n h0PXbIlDkILEx2k6HoB9GbtzZwcyTGDSVMBghuP09ge/8HJoubLnu03CV1DTQcnvRF xIkZec/bX1F8A== Received: from rostedt by gandalf with local (Exim 4.98.2) (envelope-from ) id 1uYxda-00000000D3f-0CsA; Mon, 07 Jul 2025 22:00:50 -0400 Message-ID: <20250708020003.565862284@kernel.org> User-Agent: quilt/0.68 Date: Mon, 07 Jul 2025 22:00:03 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org, x86@kernel.org Cc: Masami Hiramatsu , Mathieu Desnoyers , Josh Poimboeuf , Peter Zijlstra , Ingo Molnar , Jiri Olsa , Namhyung Kim , Thomas Gleixner , Andrii Nakryiko , Indu Bhagat , "Jose E. Marchesi" , Beau Belgrave , Jens Remus , Linus Torvalds , Andrew Morton , Jens Axboe , Florian Weimer , Sam James Subject: [PATCH v13 00/11] perf: Support the deferred unwinding infrastructure Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: This is based on top of the deferred unwind core patch series: https://lore.kernel.org/linux-trace-kernel/20250708012239.268642741@kernel.org/ git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git unwind/core This series implements the perf interface to use deferred user space stack tracing. The code for this series is located here: git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git unwind/perf Changes since v12: https://lore.kernel.org/linux-trace-kernel/20250701180410.755491417@goodmis.org/ - Also check against PF_USER_WORKER as io workers do not have PF_KTHREAD set. - Removed deferred_request_nmi() and have NMIs just use the normal deferred_request() function. As Peter Zijlstra has stated, in_nmi() can nest because some exceptions set in_nmi() and another NMI could come in. - Removed use of timestamp. The deferred unwind has gone back to using cookies, and perf doesn't use the cookie. This means the struct perf_callchain_deferred_event is not modified. Head SHA1: 3d88d03d533ede8d2d513942e768607aa9279c4b Josh Poimboeuf (5): perf: Remove get_perf_callchain() init_nr argument perf: Have get_perf_callchain() return NULL if crosstask and user are set perf: Simplify get_perf_callchain() user logic perf: Skip user unwind if the task is a kernel thread perf: Support deferred user callchains Namhyung Kim (4): perf tools: Minimal CALLCHAIN_DEFERRED support perf record: Enable defer_callchain for user callchains perf script: Display PERF_RECORD_CALLCHAIN_DEFERRED perf tools: Merge deferred user callchains Steven Rostedt (2): perf: Use current->flags & PF_KTHREAD|PF_USER_WORKER instead of current->mm == NULL perf: Support deferred user callchains for per CPU events ---- include/linux/perf_event.h | 13 +- include/uapi/linux/perf_event.h | 19 +- kernel/bpf/stackmap.c | 8 +- kernel/events/callchain.c | 49 ++-- kernel/events/core.c | 407 +++++++++++++++++++++++++++++- tools/include/uapi/linux/perf_event.h | 19 +- tools/lib/perf/include/perf/event.h | 7 + tools/perf/Documentation/perf-script.txt | 5 + tools/perf/builtin-script.c | 92 +++++++ tools/perf/util/callchain.c | 24 ++ tools/perf/util/callchain.h | 3 + tools/perf/util/event.c | 1 + tools/perf/util/evlist.c | 1 + tools/perf/util/evlist.h | 1 + tools/perf/util/evsel.c | 39 +++ tools/perf/util/evsel.h | 1 + tools/perf/util/machine.c | 1 + tools/perf/util/perf_event_attr_fprintf.c | 1 + tools/perf/util/sample.h | 3 +- tools/perf/util/session.c | 78 ++++++ tools/perf/util/tool.c | 2 + tools/perf/util/tool.h | 4 +- 22 files changed, 742 insertions(+), 36 deletions(-)