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=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 4404FECDE20 for ; Wed, 11 Sep 2019 10:19:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 108152089F for ; Wed, 11 Sep 2019 10:19:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="kUsENYAA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727440AbfIKKTa (ORCPT ); Wed, 11 Sep 2019 06:19:30 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:58840 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727406AbfIKKTa (ORCPT ); Wed, 11 Sep 2019 06:19:30 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=wVr5sXcwDs6pnyhJohgaa7TVQtRp5amDWn72nY3VOS4=; b=kUsENYAA0wKG3iKP/bPbzw9x4 cIVr6LHCib8ChTdJHF3ZSbXA4zBihQhTzEhTgywimqtu73bzaTBgVyUPMgXC6BZ1WN10MIngw6aLP E9j4kOjV7990HBXfU9wOQNBIdtnWLpQRCMpLNprHwGNmBvhkcBySa7TVCqb3G8QekTBHP/MRkd1sE CP4Zkz+7K1/ve3J2YRSgt79KpNOqQbQf1D7qe3UW3ofOv6IMAuRNCTPuuK7JdHtEPUKwAwzSA2UFY HHKxXrLgMwNt/fA4fKPgsUysoXlX2TZCck3b/4V2oI7J3RnBm2zBeiql9YBvnkeL6icnNjRP+95zl 5ZgeH9L5A==; Received: from hch by bombadil.infradead.org with local (Exim 4.92 #3 (Red Hat Linux)) id 1i7zic-0001bm-0O; Wed, 11 Sep 2019 10:19:22 +0000 Date: Wed, 11 Sep 2019 03:19:21 -0700 From: Christoph Hellwig To: Andres Freund Cc: Dave Chinner , David Sterba , Goldwyn Rodrigues , linux-fsdevel@vger.kernel.org, jack@suse.com, hch@infradead.org, linux-ext4@vger.kernel.org, linux-btrfs@vger.kernel.org Subject: Re: Odd locking pattern introduced as part of "nowait aio support" Message-ID: <20190911101921.GA6095@infradead.org> References: <20190910223327.mnegfoggopwqqy33@alap3.anarazel.de> <20190911040420.GB27547@dread.disaster.area> <20190911093926.pfkkx25mffzeuo32@alap3.anarazel.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190911093926.pfkkx25mffzeuo32@alap3.anarazel.de> User-Agent: Mutt/1.11.4 (2019-03-13) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org On Wed, Sep 11, 2019 at 02:39:26AM -0700, Andres Freund wrote: > I do really wish buffered NOWAIT was supported... Send a patch..