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=-5.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 2A122C433E0 for ; Wed, 27 Jan 2021 03:38:23 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A793E205CA for ; Wed, 27 Jan 2021 03:38:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A793E205CA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=virtualization-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 49CDD204B1; Wed, 27 Jan 2021 03:38:22 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id z3ryXrtShr5v; Wed, 27 Jan 2021 03:38:21 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id BC1282000E; Wed, 27 Jan 2021 03:38:21 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id A9BBDC08A1; Wed, 27 Jan 2021 03:38:21 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 28DA7C013A for ; Wed, 27 Jan 2021 03:38:21 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 0D2CB86D52 for ; Wed, 27 Jan 2021 03:38:21 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id X6mdsNIU9IqR for ; Wed, 27 Jan 2021 03:38:20 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by hemlock.osuosl.org (Postfix) with ESMTPS id 62C3D86C94 for ; Wed, 27 Jan 2021 03:38:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1611718699; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6ojwvtMBCsJJQwZI0mURdly6zmrAVvM3gxoe36lRJ0c=; b=cJz9q05B1eYzB6aPCwyUZokeBBWF51vdmy5EWeP5PcFH2KT/Pt8I1Js1ZubX0HGFiRstxI Ws1QoMyyRqtH3IFEmd4xXSUbU5TGDJw7ZtS1uSxO4xzqwdH+fEPjrxNUZR9ZYUm0nl+dyJ d76QT3Y5jfekZss2Ulvw/o8JG76dcwQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-334-evH1NpuwP6CCyR5UVzOXgw-1; Tue, 26 Jan 2021 22:38:15 -0500 X-MC-Unique: evH1NpuwP6CCyR5UVzOXgw-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8CA3F1922021; Wed, 27 Jan 2021 03:38:13 +0000 (UTC) Received: from [10.72.13.33] (ovpn-13-33.pek2.redhat.com [10.72.13.33]) by smtp.corp.redhat.com (Postfix) with ESMTP id A00FB19726; Wed, 27 Jan 2021 03:37:56 +0000 (UTC) Subject: Re: [RFC v3 01/11] eventfd: track eventfd_signal() recursion depth separately in different cases To: Yongji Xie References: <20210119045920.447-1-xieyongji@bytedance.com> <20210119045920.447-2-xieyongji@bytedance.com> From: Jason Wang Message-ID: <6a5f0186-c2e3-4603-9826-50d5c68a3fda@redhat.com> Date: Wed, 27 Jan 2021 11:37:54 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Cc: axboe@kernel.dk, Jonathan Corbet , kvm@vger.kernel.org, "Michael S. Tsirkin" , linux-aio@kvack.org, netdev@vger.kernel.org, Randy Dunlap , Matthew Wilcox , virtualization@lists.linux-foundation.org, Christoph Hellwig , Bob Liu , bcrl@kvack.org, viro@zeniv.linux.org.uk, Stefan Hajnoczi , linux-fsdevel@vger.kernel.org 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-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" Ck9uIDIwMjEvMS8yMCDkuIvljYgyOjUyLCBZb25namkgWGllIHdyb3RlOgo+IE9uIFdlZCwgSmFu IDIwLCAyMDIxIGF0IDEyOjI0IFBNIEphc29uIFdhbmcgPGphc293YW5nQHJlZGhhdC5jb20+IHdy b3RlOgo+Pgo+PiBPbiAyMDIxLzEvMTkg5LiL5Y2IMTI6NTksIFhpZSBZb25namkgd3JvdGU6Cj4+ PiBOb3cgd2UgaGF2ZSBhIGdsb2JhbCBwZXJjcHUgY291bnRlciB0byBsaW1pdCB0aGUgcmVjdXJz aW9uIGRlcHRoCj4+PiBvZiBldmVudGZkX3NpZ25hbCgpLiBUaGlzIGNhbiBhdm9pZCBkZWFkbG9j ayBvciBzdGFjayBvdmVyZmxvdy4KPj4+IEJ1dCBpbiBzdGFjayBvdmVyZmxvdyBjYXNlLCBpdCBz aG91bGQgYmUgT0sgdG8gaW5jcmVhc2UgdGhlCj4+PiByZWN1cnNpb24gZGVwdGggaWYgbmVlZGVk LiBTbyB3ZSBhZGQgYSBwZXJjcHUgY291bnRlciBpbiBldmVudGZkX2N0eAo+Pj4gdG8gbGltaXQg dGhlIHJlY3Vyc2lvbiBkZXB0aCBmb3IgZGVhZGxvY2sgY2FzZS4gVGhlbiBpdCBjb3VsZCBiZQo+ Pj4gZmluZSB0byBpbmNyZWFzZSB0aGUgZ2xvYmFsIHBlcmNwdSBjb3VudGVyIGxhdGVyLgo+Pgo+ PiBJIHdvbmRlciB3aGV0aGVyIG9yIG5vdCBpdCdzIHdvcnRoIHRvIGludHJvZHVjZSBwZXJjcHUg Zm9yIGVhY2ggZXZlbnRmZC4KPj4KPj4gSG93IGFib3V0IHNpbXBseSBjaGVjayBpZiBldmVudGZk X3NpZ25hbF9jb3VudCgpIGlzIGdyZWF0ZXIgdGhhbiAyPwo+Pgo+IEl0IGNhbid0IGF2b2lkIGRl YWRsb2NrIGluIHRoaXMgd2F5LgoKCkkgbWF5IG1pc3Mgc29tZXRoaW5nIGJ1dCB0aGUgY291bnQg aXMgdG8gYXZvaWQgcmVjdXJzaXZlIGV2ZW50ZmQgY2FsbC4gClNvIGZvciBWRFVTRSB3aGF0IHdl IHN1ZmZlcnMgaXMgZS5nIHRoZSBpbnRlcnJ1cHQgaW5qZWN0aW9uIHBhdGg6Cgp1c2Vyc3BhY2Ug d3JpdGUgSVJRRkQgLT4gdnEtPmNiKCkgLT4gYW5vdGhlciBJUlFGRC4KCkl0IGxvb2tzIGxpa2Ug aW5jcmVhc2luZyBFVkVOVEZEX1dBS0VVUF9ERVBUSCBzaG91bGQgYmUgc3VmZmljaWVudD8KClRo YW5rcwoKCj4gU28gd2UgbmVlZCBhIHBlcmNwdSBjb3VudGVyIGZvcgo+IGVhY2ggZXZlbnRmZCB0 byBsaW1pdCB0aGUgcmVjdXJzaW9uIGRlcHRoIGZvciBkZWFkbG9jayBjYXNlcy4gQW5kCj4gdXNp bmcgYSBnbG9iYWwgcGVyY3B1IGNvdW50ZXIgdG8gYXZvaWQgc3RhY2sgb3ZlcmZsb3cuCj4KPiBU aGFua3MsCj4gWW9uZ2ppCj4KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fClZpcnR1YWxpemF0aW9uIG1haWxpbmcgbGlzdApWaXJ0dWFsaXphdGlvbkBsaXN0 cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcv bWFpbG1hbi9saXN0aW5mby92aXJ0dWFsaXphdGlvbg==