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 X-Spam-Level: X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F0B91C43460 for ; Thu, 1 Apr 2021 10:00:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DD31F6108B for ; Thu, 1 Apr 2021 10:00:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234086AbhDAKAV (ORCPT ); Thu, 1 Apr 2021 06:00:21 -0400 Received: from mx2.suse.de ([195.135.220.15]:45160 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234083AbhDAKAG (ORCPT ); Thu, 1 Apr 2021 06:00:06 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1617271205; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=nS11drbBOUeGpe07WzalDt/lnrjMk6susFn10riCnYQ=; b=acwt7bsq2jp4J6dc4Q4lCyMWleg8pXHsumpqgemsGhLOjgDaib71Ag7ILtNIwQBhrHMJyp q1uF4gd525zr7on1/e5SbLSgF8mnUBJXwjbqhr63y4+YjOf3LSgvfbClJ5H15Mv8rP1THW hx/DH8H2PBth9Q5Uc3muIcqznZtD/JA= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id C4622B025; Thu, 1 Apr 2021 10:00:05 +0000 (UTC) Date: Thu, 1 Apr 2021 12:00:05 +0200 From: Petr Mladek To: John Ogness Cc: Sergey Senozhatsky , Sergey Senozhatsky , Steven Rostedt , Thomas Gleixner , linux-kernel@vger.kernel.org Subject: Re: [PATCH printk v2 1/5] printk: track/limit recursion Message-ID: References: <20210330153512.1182-1-john.ogness@linutronix.de> <20210330153512.1182-2-john.ogness@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210330153512.1182-2-john.ogness@linutronix.de> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue 2021-03-30 17:35:08, John Ogness wrote: > Currently the printk safe buffers provide a form of recursion > protection by redirecting to the safe buffers whenever printk() is > recursively called. > > In preparation for removal of the safe buffers, provide an alternate > explicit recursion protection. Recursion is limited to 3 levels > per-CPU and per-context. > > Signed-off-by: John Ogness Reviewed-by: Petr Mladek Best Regards, Petr