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[2620:137:e000::1:20]) by mx.google.com with ESMTP id i16-20020a1709061e5000b007826cb6f57csi1474027ejj.407.2022.10.25.09.29.33; Tue, 25 Oct 2022 09:30:06 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@suse.com header.s=susede1 header.b=Uw2sHt28; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=suse.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232931AbiJYPcm (ORCPT + 99 others); Tue, 25 Oct 2022 11:32:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37712 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232616AbiJYPcj (ORCPT ); Tue, 25 Oct 2022 11:32:39 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 92D946A48F for ; Tue, 25 Oct 2022 08:32:37 -0700 (PDT) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id 5210E2204D; Tue, 25 Oct 2022 15:32:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1666711956; 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=qQCwd41rDpy0rt5Enc7XkN/e7uTo487lpbqJTkBn6Us=; b=Uw2sHt28AMEp5ujwtvV2WyoEtPJWtYfLzt6uoPwagggwXKzeQJ2JhO73A58je3YJhlSEmN 9eLBNIphR2kCgUbj+HqeFk80Ug8qMwrzmfjeCAWOF07hq4kLkUvCisE+OoV5YqqcdPXVO8 YyJFnFFP4XjYcPWPb+lfEsRv8Hrlt1U= Received: from suse.cz (unknown [10.100.208.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by relay2.suse.de (Postfix) with ESMTPS id 311112C143; Tue, 25 Oct 2022 15:32:36 +0000 (UTC) Date: Tue, 25 Oct 2022 17:32:35 +0200 From: Petr Mladek To: John Ogness Cc: Sergey Senozhatsky , Steven Rostedt , Thomas Gleixner , linux-kernel@vger.kernel.org Subject: Re: [PATCH printk v2 29/38] printk: console_flush_on_panic: use srcu console list iterator Message-ID: References: <20221019145600.1282823-1-john.ogness@linutronix.de> <20221019145600.1282823-30-john.ogness@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221019145600.1282823-30-john.ogness@linutronix.de> X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed 2022-10-19 17:01:51, John Ogness wrote: > With SRCU it is now safe to traverse the console list, even if > the console_trylock() failed. However, overwriting console->seq > when console_trylock() failed is still an issue. > > Switch to SRCU iteration and document remaining issue with > console->seq. > > Signed-off-by: John Ogness Reviewed-by: Petr Mladek Best Regards, Petr