From patchwork Tue Dec 22 14:52:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yongji Xie X-Patchwork-Id: 11986827 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=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 486FDC433E9 for ; Tue, 22 Dec 2020 14:54:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A87B229CA for ; Tue, 22 Dec 2020 14:54:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727749AbgLVOyd (ORCPT ); Tue, 22 Dec 2020 09:54:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43468 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727679AbgLVOyZ (ORCPT ); Tue, 22 Dec 2020 09:54:25 -0500 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D26DAC0611C5 for ; Tue, 22 Dec 2020 06:53:24 -0800 (PST) Received: by mail-pl1-x62f.google.com with SMTP id g3so7556929plp.2 for ; Tue, 22 Dec 2020 06:53:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=WpzztgDjuirSaoCm4Y9iwgLXbmOFGv5bSk1ou8troPs=; b=SqjN6hrfpyhBwT61OSi1kdMYlrZ3RN/kNoO0meZihnrymD1OEZhDiehSeRBO23nRd3 0bePzkBUAfUa3AueEFxYHLVuAUzf/70fjyq1CMYK9znh3Dt3g5NRXaEH9h3Y+Ll5ngAw EqwY0xb471qaO+7coD9Rx3Xyzz2C8we1VZ9AUBLgNPufs73v+d3cQjmp9/zxvoiPMfxH hS/tFA6Hf6KCUPvoEjyuLlp0mHV549uAKmUN3uw6NhbkY1HD7luXcKfDEWpPUPRv4xXI WSufNIjIFu+kpf28itIRTLRtWwm2y2x+InNRzR+rcAM53ftC9V1P4fpGMavgLphPfdiQ of6A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=WpzztgDjuirSaoCm4Y9iwgLXbmOFGv5bSk1ou8troPs=; b=mbG3V3lrHeDB/PLaYDwxH72rJ4nLyzA+Uy47WlfmYdiVi7qBr6P8ClpzzXYN9toKB5 Fj+rW2W2SkIrGcUEw0ff/s1TQ6Rj5Y3kH15ekb492K9zhi3SLyc9HTcv9xZvC0L4dCcD FQQ6iEU+9CpieH3xjLTVHAekYZTwKIxC3s12BXLj426XNtjpR11nuawinohTP12l5svj YOnLbTez7dt2d2lyoG0wWsl2brO+5h2QvGhmmMZXBkmWjnOLVEJ0pkAN1JplLaBzokpz q+PK3FUixeHhtsBLie3k2JHsZaZAWJVVKPlCz+cDxG8I2nfz62Sf3LLCpI3Zf0KcSxp+ +A1g== X-Gm-Message-State: AOAM531EHLunB06jLxd+zkXRMpmxi3ozJy07C4MVBqMtNuHyKYTqERD6 EiuicvLgB+trA/Y5KiR7cZp4 X-Google-Smtp-Source: ABdhPJxtTfGgv72xCHxYQaMRyp49L/o4fVi3XSgB6dBOFr3oospxL5XhVJtc/Nm8dWEkqKFRd4gPaA== X-Received: by 2002:a17:902:6b84:b029:dc:3419:b555 with SMTP id p4-20020a1709026b84b02900dc3419b555mr16883881plk.77.1608648804465; Tue, 22 Dec 2020 06:53:24 -0800 (PST) Received: from localhost ([139.177.225.248]) by smtp.gmail.com with ESMTPSA id h8sm23516011pjc.2.2020.12.22.06.53.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Dec 2020 06:53:23 -0800 (PST) From: Xie Yongji To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, akpm@linux-foundation.org, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net Cc: virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, kvm@vger.kernel.org, linux-aio@kvack.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC v2 03/13] eventfd: Increase the recursion depth of eventfd_signal() Date: Tue, 22 Dec 2020 22:52:11 +0800 Message-Id: <20201222145221.711-4-xieyongji@bytedance.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201222145221.711-1-xieyongji@bytedance.com> References: <20201222145221.711-1-xieyongji@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Increase the recursion depth of eventfd_signal() to 1. This will be used in VDUSE case later. Signed-off-by: Xie Yongji --- fs/eventfd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/eventfd.c b/fs/eventfd.c index 2df24f9bada3..478cdc175949 100644 --- a/fs/eventfd.c +++ b/fs/eventfd.c @@ -25,7 +25,7 @@ #include #include -#define EVENTFD_WAKE_DEPTH 0 +#define EVENTFD_WAKE_DEPTH 1 DEFINE_PER_CPU(int, eventfd_wake_count);