From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 EF9EB370AF3; Wed, 30 Sep 2026 15:47:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790783280; cv=none; b=BsQu7nlzNViJVhR5eqhalhGwprTbl6ey6NgWS31BV4CTUIVi26w30P3PhSQTwlkzimaqay0gXyCdf9g2Sp/D2rwdoo8YEbbhrfKr45ZoQqxTqicua6Q9fhafuV/SzcjL0yg+J4EI/hxdO34UWxI/JFw1rslV46AVmbSG29wsNvo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790783280; c=relaxed/simple; bh=Ob2i3/OuWRZWG4EUTaQXmYhqCSzjP2MTrZexg3spj5A=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kL2zc4OGxC8ha/DI2j1fz0h8hI0JQ0M0agKKSfVrl+EANJUyDNEXSgbI888Creeefv23905vT22NlOsVsSshcEs0g2ebfnWKuUv09rbVGIX0KcpQiQEI4Lm5Uu0hp3qRxkGGtzhsq+FkGOgSO0ZBI6hfXmFi7iGuGc0nQ2gE1KQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=tJyvQLhR; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="tJyvQLhR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3F27E1F000FF; Wed, 30 Sep 2026 15:47:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790783276; bh=/oupnASdGmvdYSl9zkyFRHEJgUS0dILxLfIj96+BDDk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=tJyvQLhR7nlKWV98VTlKUqodYrw1V1FQ9+8o9ZNu5dVeAmOLECu7QKwV2zhdfLC0Z n9DWYpS+3kODKVnkkCdbnMdxIpcWbiF3yc7gOOXztzB6KQhIjqmSBUdAZMzGoIQ+He rFQdWq9XNnxLKvSa9uG/JIZsQIF3uTUHQHNqJ+30= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sasha Levin Subject: [PATCH 5.10 341/595] Revert "perf cs-etm: Flush thread stacks after decoder reset" Date: Wed, 30 Sep 2026 17:23:54 +0200 Message-ID: <20260930152355.013273723@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152347.700140858@linuxfoundation.org> References: <20260930152347.700140858@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ This reverts commit e7e168699270235880344e3a0c9b8ce5c947ff3a. Signed-off-by: Sasha Levin --- tools/perf/util/cs-etm.c | 45 ---------------------------------------- 1 file changed, 45 deletions(-) diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 9b38eedabc9fc..2055d582a8a43 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -1609,45 +1609,6 @@ static int cs_etm__end_block(struct cs_etm_queue *etmq, return 0; } - -static int cs_etm__flush_stack_cb(struct thread *thread, - void *data __maybe_unused) -{ - thread_stack__flush(thread); - return 0; -} - -static void cs_etm__flush_machine_stack(struct cs_etm_queue *etmq, pid_t pid) -{ - struct machine *machine; - - machine = machines__find(&etmq->etm->session->machines, pid); - if (machine) - machine__for_each_thread(machine, cs_etm__flush_stack_cb, NULL); -} - -static void cs_etm__flush_all_stack(struct cs_etm_queue *etmq) -{ - enum cs_etm_pid_fmt pid_fmt = cs_etm__get_pid_fmt(etmq); - - if (!etmq->etm->synth_opts.last_branch) - return; - - switch (pid_fmt) { - case CS_ETM_PIDFMT_CTXTID2: - /* Clear the guest stack if virtualization is supported */ - cs_etm__flush_machine_stack(etmq, DEFAULT_GUEST_KERNEL_ID); - fallthrough; - case CS_ETM_PIDFMT_CTXTID: - cs_etm__flush_machine_stack(etmq, HOST_KERNEL_ID); - break; - case CS_ETM_PIDFMT_NONE: - default: - break; - - } -} - /* * cs_etm__get_data_block: Fetch a block from the auxtrace_buffer queue * if need be. @@ -1670,12 +1631,6 @@ static int cs_etm__get_data_block(struct cs_etm_queue *etmq) ret = cs_etm_decoder__reset(etmq->decoder); if (ret) return ret; - - /* - * Since the decoder is reset, this causes a global trace - * discontinuity. Flush all thread stacks. - */ - cs_etm__flush_all_stack(etmq); } return etmq->buf_len; -- 2.53.0