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 smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E8595C77B7A for ; Mon, 29 May 2023 17:55:14 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 3B4E94179A; Mon, 29 May 2023 17:55:14 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp4.osuosl.org 3B4E94179A Authentication-Results: smtp4.osuosl.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=U8CEMZRE X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id O1zP5sFtB9P0; Mon, 29 May 2023 17:55:13 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp4.osuosl.org (Postfix) with ESMTPS id 8A9534188B; Mon, 29 May 2023 17:55:12 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp4.osuosl.org 8A9534188B Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 6179FC0036; Mon, 29 May 2023 17:55:12 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [IPv6:2605:bc80:3010::137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 72FFCC002A for ; Mon, 29 May 2023 17:55:11 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 4792841EC3 for ; Mon, 29 May 2023 17:55:11 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp4.osuosl.org 4792841EC3 X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id R6A5lIsky6tO for ; Mon, 29 May 2023 17:55:10 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp4.osuosl.org C50EC41ED7 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by smtp4.osuosl.org (Postfix) with ESMTPS id C50EC41ED7 for ; Mon, 29 May 2023 17:55:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1685382908; h=from:from:reply-to:subject:subject: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=h5T9MHRTHIQNCUkVW4I4H09mYouCxsI7tWivq2a2Wpc=; b=U8CEMZREASD7sBoscnEb/lG3CT58qNvb6AQFbBSV3i6sggxVroSypn6AmpJzNxwP9VAMGe mHumbQTcakzUv3bjpR0U24od7eiDwH/pf1ZtvoHMrDMBUTtgnilk8z1HpauR0G1DlO2lkm D1ReatMZbAkrerjTtNflxBSlq17zXqQ= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-557-Rlbg88dHOUyRqa9wMvsnNQ-1; Mon, 29 May 2023 13:55:03 -0400 X-MC-Unique: Rlbg88dHOUyRqa9wMvsnNQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 2D41C101A531; Mon, 29 May 2023 17:55:03 +0000 (UTC) Received: from dhcp-27-174.brq.redhat.com (unknown [10.45.226.99]) by smtp.corp.redhat.com (Postfix) with SMTP id 1946620296C6; Mon, 29 May 2023 17:54:59 +0000 (UTC) Received: by dhcp-27-174.brq.redhat.com (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Mon, 29 May 2023 19:54:44 +0200 (CEST) Date: Mon, 29 May 2023 19:54:40 +0200 From: Oleg Nesterov To: michael.christie@oracle.com Subject: Re: [PATCH 3/3] fork, vhost: Use CLONE_THREAD to fix freezer/ps regression Message-ID: <20230529175440.GC15193@redhat.com> References: <87ttw1zt4i.fsf@email.froward.int.ebiederm.org> <20230525115512.GA9229@redhat.com> <87y1lcxwcj.fsf@email.froward.int.ebiederm.org> <87cz2mrtnk.fsf@email.froward.int.ebiederm.org> <87mt1pmezu.fsf@email.froward.int.ebiederm.org> <20230529111859.GA15193@redhat.com> <022f4de6-9eae-0a94-0f55-b84be4982fc3@oracle.com> <20230529174646.GB15193@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20230529174646.GB15193@redhat.com> User-Agent: Mutt/1.5.24 (2015-08-30) X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 Cc: axboe@kernel.dk, brauner@kernel.org, mst@redhat.com, linux-kernel@vger.kernel.org, linux@leemhuis.info, "Eric W. Biederman" , stefanha@redhat.com, nicolas.dichtel@6wind.com, virtualization@lists.linux-foundation.org, Linus Torvalds X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" On 05/29, Oleg Nesterov wrote: > > Mike, sorry, I don't understand your email. > > Just in case, let me remind I know nothing about drivers/vhost/ And... this is slightly off-topic but you didn't answer my previous question and I am just curious. Do you agree that, even if we forget about CLONE_THREAD/signals, vhost_worker() needs fixes anyway because it can race with vhost_work_queue() ? Oleg. _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization