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[2620:137:e000::1:20]) by mx.google.com with ESMTP id a127-20020a621a85000000b00643bb2643f5si2170751pfa.124.2023.05.18.11.38.12; Thu, 18 May 2023 11:38:25 -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=@kernel.org header.s=k20201202 header.b=GtZN4Otg; 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=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229851AbjERSMl (ORCPT + 99 others); Thu, 18 May 2023 14:12:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51224 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229454AbjERSMk (ORCPT ); Thu, 18 May 2023 14:12:40 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8A913193 for ; Thu, 18 May 2023 11:12:39 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 2E55065174 for ; Thu, 18 May 2023 18:12:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6A80AC433D2; Thu, 18 May 2023 18:12:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1684433558; bh=GNlcuW3+7623yOfnEPCTxQifwH2hirg4FSU2Phfotc4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=GtZN4OtgGcovwPt8Q7PxLLuh9yDkyxvoFx0hvvrk0BLtu37A3H0WQAhLYHmjYZQEV OLry301uPXfaJIO+b8I9e+yqqrOo+JNQsP1I2nt/sFK94fvZZLUAEN+UwwF9Udvks6 6GpGy8noKAe6ReRB+uu9ErdqqSXrchXDluc5J9HY/r2D05nuWX/zkdjJbuV3UIIN9b qyub6MafY66tyUD8XX9Piv3FZKmh+/PRM3q3zWPPDZPTBct8thYQ9pt64cKo2M4Unz 7P3dTvJqFSJWnUSvi4HhaTlGCTteoYJPmBrzPNrikEPXGm9dcL61H6janKnJJ99bWD +SWSk00B2asFQ== Date: Thu, 18 May 2023 20:12:32 +0200 From: Christian Brauner To: Oleg Nesterov Cc: Mike Christie , linux@leemhuis.info, nicolas.dichtel@6wind.com, axboe@kernel.dk, ebiederm@xmission.com, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, mst@redhat.com, sgarzare@redhat.com, jasowang@redhat.com, stefanha@redhat.com Subject: Re: [RFC PATCH 1/8] signal: Dequeue SIGKILL even if SIGNAL_GROUP_EXIT/group_exec_task is set Message-ID: <20230518-fettgehalt-erdbeben-25587a432815@brauner> References: <20230518000920.191583-1-michael.christie@oracle.com> <20230518000920.191583-2-michael.christie@oracle.com> <20230518-kontakt-geduckt-25bab595f503@brauner> <7412912a-a470-bd3d-fb1c-54c094cc01ee@oracle.com> <20230518-ratgeber-erbeben-843e68b0d6ac@brauner> <20230518180809.GA5817@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20230518180809.GA5817@redhat.com> X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE 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 Thu, May 18, 2023 at 08:08:10PM +0200, Oleg Nesterov wrote: > On 05/18, Christian Brauner wrote: > > > > Yeah, but these are issues that exist with PF_IO_WORKER then too > > This was my thought too but I am starting to think I was wrong. > > Of course I don't understand the code in io_uring/ but it seems > that it always breaks the IO loops if get_signal() returns SIGKILL. Yeah, it does and I think Mike has a point that vhost could be running into an issue here that io_uring currently does avoid. But I don't think we should rely on that.