From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from frasgout12.his.huawei.com (frasgout12.his.huawei.com [14.137.139.154]) (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 7E04319F42C; Thu, 19 Sep 2024 14:00:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=14.137.139.154 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726754448; cv=none; b=DJhNyAyP9h0O2rAmaifyFVWQVt8WZmABUwAgGsbrfM0lBUUOD9a5Mvx5vo93egdQRmejqfiFnEas4pDi/Ctw6/WMYf4jfjViDrXZUh7TRu4pCyQWSyGwyR+8nsYgnIqEQLkTgxu/odDeAIDRNXauNqgSmZKAwi+SMp3r73xnzEk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726754448; c=relaxed/simple; bh=UIY7GQQtGwMKvGzu2eDJyLTjdUvx3nsugqXZIni3/Rk=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=lICRBVzAOHdkpBku+Igfg3amYv0si9PP5KBD8qsZpt5wbZpDPr/Eui5kPZ3u3BeuXpYr82GsuzwjGJkRNrXW2wSrj/C0uszh3Hherk+Y+ydSTX/27ls1J9nvmMBIFHwRTpececJ3ZYHpJFR/8AGvE7T2EHYnlxc6gunM97EF66Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=14.137.139.154 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.18.186.29]) by frasgout12.his.huawei.com (SkyGuard) with ESMTP id 4X8c2s06Y9z9v7Jk; Thu, 19 Sep 2024 21:35:17 +0800 (CST) Received: from mail02.huawei.com (unknown [7.182.16.27]) by mail.maildlp.com (Postfix) with ESMTP id 72F0F140122; Thu, 19 Sep 2024 22:00:42 +0800 (CST) Received: from [10.81.207.148] (unknown [10.81.207.148]) by APP2 (Coremail) with SMTP id GxC2BwBHqcl5LuxmWCM9AQ--.55605S2; Thu, 19 Sep 2024 15:00:41 +0100 (CET) Message-ID: Date: Thu, 19 Sep 2024 16:00:22 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 1/4] hazptr: Add initial implementation of hazard pointers To: Boqun Feng , linux-kernel@vger.kernel.org, rcu@vger.kernel.org, linux-mm@kvack.org, lkmm@vger.kernel.org Cc: "Paul E. McKenney" , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Uladzislau Rezki , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Peter Zijlstra , Ingo Molnar , Will Deacon , Waiman Long , Mark Rutland , Thomas Gleixner , Kent Overstreet , Linus Torvalds , Vlastimil Babka , maged.michael@gmail.com, Neeraj Upadhyay References: <20240917143402.930114-1-boqun.feng@gmail.com> <20240917143402.930114-2-boqun.feng@gmail.com> From: Jonas Oberhauser In-Reply-To: <20240917143402.930114-2-boqun.feng@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CM-TRANSID:GxC2BwBHqcl5LuxmWCM9AQ--.55605S2 X-Coremail-Antispam: 1UD129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7v73 VFW2AGmfu7bjvjm3AaLaJ3UjIYCTnIWjp_UUUY37kC6x804xWl14x267AKxVWrJVCq3wAF c2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII 0Yj41l84x0c7CEw4AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26r1j6r1xM28EF7xv wVC0I7IYx2IY6xkF7I0E14v26r4j6F4UM28EF7xvwVC2z280aVAFwI0_Gr0_Cr1l84ACjc xK6I8E87Iv6xkF7I0E14v26r4UJVWxJr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG 64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r 1j6r4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvEwIxGrwACI402YVCY1x02628vn2kI c2xKxwCF04k20xvY0x0EwIxGrwCF54CYxVCY1x0262kKe7AKxVW8ZVWrXwCFx2IqxVCFs4 IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1r MI8E67AF67kF1VAFwI0_GFv_WrylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJV WUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j 6r1xMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr1j6F4UJb IYCTnIWIevJa73UjIFyTuYvjxUFYFCUUUUU X-CM-SenderInfo: 5mrqt2oorev25kdx2v3u6k3tpzhluzxrxghudrp/ Am 9/17/2024 um 4:33 PM schrieb Boqun Feng: > +#define hazptr_protect(hzp, gp, field) ({ \ > + typeof(gp) ___p; \ > + \ > + ___p = hazptr_tryprotect(hzp, gp, field); \ > + BUG_ON(!___p); \ > + ___p; \ > +}) Hi Boqun, why crash instead of retry? jonas