From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D5E84C433EF for ; Wed, 27 Oct 2021 01:55:35 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 624D060E76 for ; Wed, 27 Oct 2021 01:55:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 624D060E76 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:Cc:To:Subject:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=n9fa+R0qhNj8CfTpf4Ii+vYKtAInGf04GBezoP1kQfI=; b=AOdOwUGfWW9Xgx7gk78tnrt6ut 5Lif55391kHOOl15FcQbLaTbE8Po+SivFqRZUgXh5SvCAVdGQ61KTNn+OvdVyRQyh0XcqXeXQYCnH ntXeCK56vCV8rY2o2ejP36Uc0Ce5tChNmTxjMERPLKlRwJdkDPj6cWfA4GQuY/mpaTp4/1mvU6knA /WsQIFs6szh/RtBw2tF2d2OZvhcgmIECFoYrpDO6TA4yXVQ5oyYDwJaBzK0+1xOZwE+3/eopZfrg0 uJUYv2to/ARV3D04aPF8g2ZeBbkTz5E6tL1EFlNzKdohe0GRUtKgSJOJ8oLygmxk2UcfzM1lY1NiQ bH1ddVvA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mfY9x-003XPW-NS; Wed, 27 Oct 2021 01:55:21 +0000 Received: from out30-131.freemail.mail.aliyun.com ([115.124.30.131]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mfY9u-003XOw-9r for linux-riscv@lists.infradead.org; Wed, 27 Oct 2021 01:55:20 +0000 X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R441e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=e01e04423; MF=yun.wang@linux.alibaba.com; NM=1; PH=DS; RN=30; SR=0; TI=SMTPD_---0UtpFhNO_1635299711; Received: from testdeMacBook-Pro.local(mailfrom:yun.wang@linux.alibaba.com fp:SMTPD_---0UtpFhNO_1635299711) by smtp.aliyun-inc.com(127.0.0.1); Wed, 27 Oct 2021 09:55:13 +0800 Subject: Re: [PATCH v5 1/2] ftrace: disable preemption when recursion locked To: Steven Rostedt Cc: Miroslav Benes , Guo Ren , Ingo Molnar , "James E.J. Bottomley" , Helge Deller , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Paul Walmsley , Palmer Dabbelt , Albert Ou , Thomas Gleixner , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , Josh Poimboeuf , Jiri Kosina , Petr Mladek , Joe Lawrence , Masami Hiramatsu , "Peter Zijlstra (Intel)" , Nicholas Piggin , Jisheng Zhang , linux-csky@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, live-patching@vger.kernel.org References: <3ca92dc9-ea04-ddc2-71cd-524bfa5a5721@linux.alibaba.com> <333cecfe-3045-8e0a-0c08-64ff590845ab@linux.alibaba.com> <18ba2a71-e12d-33f7-63fe-2857b2db022c@linux.alibaba.com> <20211026080117.366137a5@gandalf.local.home> From: =?UTF-8?B?546L6LSH?= Message-ID: <3d897161-7b74-944a-f2a0-07311436fbd9@linux.alibaba.com> Date: Wed, 27 Oct 2021 09:54:13 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 MIME-Version: 1.0 In-Reply-To: <20211026080117.366137a5@gandalf.local.home> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211026_185518_526646_010B2118 X-CRM114-Status: GOOD ( 17.69 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org CgpPbiAyMDIxLzEwLzI2IOS4i+WNiDg6MDEsIFN0ZXZlbiBSb3N0ZWR0IHdyb3RlOgo+IE9uIFR1 ZSwgMjYgT2N0IDIwMjEgMTc6NDg6MTAgKzA4MDAKPiDnjovotIcgPHl1bi53YW5nQGxpbnV4LmFs aWJhYmEuY29tPiB3cm90ZToKPiAKPj4+IFRoZSB0d28gY29tbWVudHMgc2hvdWxkIGJlIHVwZGF0 ZWQgdG9vIHNpbmNlIFN0ZXZlbiByZW1vdmVkIHRoZSAiYml0ID09IDAiIAo+Pj4gdHJpY2suICAK Pj4KPj4gQ291bGQgeW91IHBsZWFzZSBnaXZlIG1vcmUgaGludCBvbiBob3cgd2lsbCBpdCBiZSBj b3JyZWN0Pwo+Pgo+PiBJIGdldCB0aGUgcG9pbnQgdGhhdCBiaXQgd2lsbCBubyBsb25nZXIgYmUg MCwgdGhlcmUgYXJlIG9ubHkgLTEgb3IgPiAwIG5vdwo+PiBzbyB0cmFjZV90ZXN0X2FuZF9zZXRf cmVjdXJzaW9uKCkgd2lsbCBkaXNhYmxlIHByZWVtcHRpb24gb24gYml0ID4gMCBhbmQKPj4gdHJh Y2VfY2xlYXJfcmVjdXJzaW9uKCkgd2lsbCBlbmFibGVkIGl0IHNpbmNlIGl0IHNob3VsZCBvbmx5 IGJlIGNhbGxlZCB3aGVuCj4+IGJpdCA+IDAgKEkgcmVtZW1iZXIgd2UgY291bGQgdXNlIGEgV0FS Tl9PTiBoZXJlIG5vdyA6LVApLgo+Pgo+Pj4gICAKPj4+PiBAQCAtMTc4LDcgKzE4Nyw3IEBAIHN0 YXRpYyBfX2Fsd2F5c19pbmxpbmUgdm9pZCB0cmFjZV9jbGVhcl9yZWN1cnNpb24oaW50IGJpdCkK Pj4+PiAgICogdHJhY2luZyByZWN1cnNlZCBpbiB0aGUgc2FtZSBjb250ZXh0IChub3JtYWwgdnMg aW50ZXJydXB0KSwKPj4+PiAgICoKPj4+PiAgICogUmV0dXJuczogLTEgaWYgYSByZWN1cnNpb24g aGFwcGVuZWQuCj4+Pj4gLSAqICAgICAgICAgICA+PSAwIGlmIG5vIHJlY3Vyc2lvbgo+Pj4+ICsg KiAgICAgICAgICAgPiAwIGlmIG5vIHJlY3Vyc2lvbi4KPj4+PiAgICovCj4+Pj4gIHN0YXRpYyBf X2Fsd2F5c19pbmxpbmUgaW50IGZ0cmFjZV90ZXN0X3JlY3Vyc2lvbl90cnlsb2NrKHVuc2lnbmVk IGxvbmcgaXAsCj4+Pj4gIAkJCQkJCQkgdW5zaWduZWQgbG9uZyBwYXJlbnRfaXApICAKPj4+Cj4+ PiBBbmQgdGhpcyBjaGFuZ2Ugd291bGQgbm90IGJlIGNvcnJlY3Qgbm93LiAgCj4+Cj4+IEkgdGhv dWdodCBpdCB3aWxsIG5vIGxvbmdlciByZXR1cm4gMCBzbyBJIGNoYW5nZSBpdCB0byA+IDAsIGlz bid0IHRoYXQgY29ycmVjdD8KPiAKPiBObyBpdCBpcyBub3QuIEkgcmVtb3ZlZCB0aGUgYml0ICsg MSByZXR1cm4gdmFsdWUsIHdoaWNoIG1lYW5zIGl0IHJldHVybnMgdGhlCj4gYWN0dWFsIGJpdCBu b3cuIFdoaWNoIGlzIDAgb3IgbW9yZS4KCkFoLCB0aGUgcmV0dXJuIGlzIGJpdCBub3QgdmFsLCBJ IG11c3QgYmUgZHJ1bmsuLi4KCk15IGFwb2xvZ2l6ZSBmb3IgdGhlIHN0dXBpZCBjb21tZW50cy4u LiBJJ2xsIHNlbmQgYSB2NiBmb3IgdGhpcyBwYXRjaApvbmx5IHRvIGZpeCB0aGF0LCBwbGVhc2Ug bGV0IG1lIGtub3cgaWYgdGhpcyBpcyBub3QgYSBnb29kIHdheSB0byBmaXgKZmV3IGxpbmVzIG9m IGNvbW1lbnRzLgoKUmVnYXJkcywKTWljaGFlbCBXYW5nCgo+IAo+IC0tIFN0ZXZlCj4gCgpfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1yaXNjdiBt YWlsaW5nIGxpc3QKbGludXgtcmlzY3ZAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMu aW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LXJpc2N2Cg==