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 CD3FDC433EF for ; Wed, 13 Oct 2021 01:51:28 +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 98A6661039 for ; Wed, 13 Oct 2021 01:51:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 98A6661039 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=WGKPAbwaTx+ldLrk9lNkNvt1tSApXnerIkejLKvb7Cc=; b=2i2E83It6XnQ8ouj6flBEsw2DD GBSJYMh81dRvd1NnJ6FfVghKCLtuXci6rufVKQWXIn55/nLiqoAq/uWTEhDlClGor56lh1odZwcs2 SThu/ukNboJRJSy4h5QWypmhSr/w9s9gx1rLJIwexAeN/leKb66I/EWiRXJ2A9on7fDVZDIMvTeOO efU+xCyA870voXZPY6FNzA073Zr6CyJJlecE2Ns0COaTWb8ndl/eiigTE1O9CXTv9RMXJeTdiPhPh DwGNn8hSOmvmGmxfkfEh765wFki/0cXzLb+OV/ubqihFcgfFKw/xxQEKCdc/uN52HB/c3SLtXUD2f KoHRd2HA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1maTQE-00EbLk-No; Wed, 13 Oct 2021 01:51:10 +0000 Received: from out30-43.freemail.mail.aliyun.com ([115.124.30.43]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1maTQC-00EbKe-6Q for linux-riscv@lists.infradead.org; Wed, 13 Oct 2021 01:51:09 +0000 X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R151e4; 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=31; SR=0; TI=SMTPD_---0UrdGa9a_1634089862; Received: from testdeMacBook-Pro.local(mailfrom:yun.wang@linux.alibaba.com fp:SMTPD_---0UrdGa9a_1634089862) by smtp.aliyun-inc.com(127.0.0.1); Wed, 13 Oct 2021 09:51:03 +0800 Subject: Re: [PATCH 1/2] ftrace: disable preemption on the testing of recursion To: Miroslav Benes Cc: Guo Ren , Steven Rostedt , 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 , Colin Ian King , 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: <8c7de46d-9869-aa5e-2bb9-5dbc2eda395e@linux.alibaba.com> From: =?UTF-8?B?546L6LSH?= Message-ID: <74090798-7d93-0713-982c-6f0247118d20@linux.alibaba.com> Date: Wed, 13 Oct 2021 09:50:17 +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: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211012_185108_435200_236121A1 X-CRM114-Status: GOOD ( 12.20 ) 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 CgpPbiAyMDIxLzEwLzEyIOS4i+WNiDg6MjQsIE1pcm9zbGF2IEJlbmVzIHdyb3RlOgpbc25pcF0K Pj4KPj4gIAlmdW5jID0gbGlzdF9maXJzdF9vcl9udWxsX3JjdSgmb3BzLT5mdW5jX3N0YWNrLCBz dHJ1Y3Qga2xwX2Z1bmMsCj4+ICAJCQkJICAgICAgc3RhY2tfbm9kZSk7Cj4+IEBAIC0xMjAsNyAr MTE1LDYgQEAgc3RhdGljIHZvaWQgbm90cmFjZSBrbHBfZnRyYWNlX2hhbmRsZXIodW5zaWduZWQg bG9uZyBpcCwKPj4gIAlrbHBfYXJjaF9zZXRfcGMoZnJlZ3MsICh1bnNpZ25lZCBsb25nKWZ1bmMt Pm5ld19mdW5jKTsKPj4KPj4gIHVubG9jazoKPj4gLQlwcmVlbXB0X2VuYWJsZV9ub3RyYWNlKCk7 Cj4+ICAJZnRyYWNlX3Rlc3RfcmVjdXJzaW9uX3VubG9jayhiaXQpOwo+PiAgfQo+IAo+IEkgZG9u J3QgbGlrZSB0aGlzIGNoYW5nZSBtdWNoLiBXZSBoYXZlIHByZWVtcHRfZGlzYWJsZSB0aGVyZSBu b3QgYmVjYXVzZSAKPiBvZiBmdHJhY2VfdGVzdF9yZWN1cnNpb24sIGJ1dCBiZWNhdXNlIG9mIFJD VS4gZnRyYWNlX3Rlc3RfcmVjdXJzaW9uIHdhcyAKPiBhZGRlZCBsYXRlci4gWWVzLCBpdCB3b3Vs ZCB3b3JrIHdpdGggdGhlIGNoYW5nZSwgYnV0IGl0IHdvdWxkIGFsc28gaGlkZSAKPiB0aGluZ3Mg d2hpY2ggc2hvdWxkIG5vdCBiZSBoaWRkZW4gaW4gbXkgb3Bpbmlvbi4KCk5vdCB2ZXJ5IHN1cmUg YWJvdXQgdGhlIGJhY2tncm91cCBzdG9yaWVzLCBidXQganVzdCBmb3VuZCB0aGlzIGluCidEb2N1 bWVudGF0aW9uL3RyYWNlL2Z0cmFjZS11c2VzLnJzdCc6CgogIE5vdGUsIG9uIHN1Y2Nlc3MsCiAg ZnRyYWNlX3Rlc3RfcmVjdXJzaW9uX3RyeWxvY2soKSB3aWxsIGRpc2FibGUgcHJlZW1wdGlvbiwg YW5kIHRoZQogIGZ0cmFjZV90ZXN0X3JlY3Vyc2lvbl91bmxvY2soKSB3aWxsIGVuYWJsZSBpdCBh Z2FpbiAoaWYgaXQgd2FzIHByZXZpb3VzbHkKICBlbmFibGVkKS4KClNlZW1zIGxpa2UgdGhpcyBs b2NrIHBhaXIgd2FzIHN1cHBvc2VkIHRvIHRha2UgY2FyZSB0aGUgcHJlZW10aW9uIGl0c2VsZj8K ClJlZ2FyZHMsCk1pY2hhZWwgV2FuZwoKPiAKPiBNaXJvc2xhdgo+IAoKX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtcmlzY3YgbWFpbGluZyBsaXN0 CmxpbnV4LXJpc2N2QGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5v cmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1yaXNjdgo=