From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
Received: from vger.kernel.org (vger.kernel.org [23.128.96.18])
	by smtp.lore.kernel.org (Postfix) with ESMTP id 80EF7C77B7F
	for <linux-kernel@archiver.kernel.org>; Sat, 20 May 2023 01:26:22 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S230494AbjETB0T (ORCPT <rfc822;linux-kernel@archiver.kernel.org>);
        Fri, 19 May 2023 21:26:19 -0400
Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43704 "EHLO
        lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S229731AbjETB0Q (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Fri, 19 May 2023 21:26:16 -0400
Received: from out-24.mta0.migadu.com (out-24.mta0.migadu.com [91.218.175.24])
        by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9938A8E
        for <linux-kernel@vger.kernel.org>; Fri, 19 May 2023 18:26:14 -0700 (PDT)
Date:   Fri, 19 May 2023 21:26:07 -0400
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1;
        t=1684545972;
        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=7zURH3nRhfopYDNsgFsJqj8BK6IdALtBaLykLIdXVXY=;
        b=m8mNQp/SEoSnQKDdZD72CtcRdJOgBu6uw8TAun2J+cgrzfwo/rjQF+mohr+f+UQEWoPXFM
        clrF/mMliqbzrnB7MArLGXeC7c1IWrEEWSsnpOsV0SWnq6lfQkC6WDsOa0nA4kw66vQIBZ
        ut//N6boR/syBxEd4lEofwBrf7hzZyg=
X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers.
From:   Kent Overstreet <kent.overstreet@linux.dev>
To:     David Howells <dhowells@redhat.com>
Cc:     Jens Axboe <axboe@kernel.dk>, Al Viro <viro@zeniv.linux.org.uk>,
        Christoph Hellwig <hch@infradead.org>,
        Matthew Wilcox <willy@infradead.org>, Jan Kara <jack@suse.cz>,
        Jeff Layton <jlayton@kernel.org>,
        David Hildenbrand <david@redhat.com>,
        Jason Gunthorpe <jgg@nvidia.com>,
        Logan Gunthorpe <logang@deltatee.com>,
        Hillf Danton <hdanton@sina.com>,
        Christian Brauner <brauner@kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Christoph Hellwig <hch@lst.de>,
        John Hubbard <jhubbard@nvidia.com>
Subject: Re: [PATCH v20 29/32] block: Replace BIO_NO_PAGE_REF with
 BIO_PAGE_REFFED with inverted logic
Message-ID: <ZGghr0/lFRKmaoAX@moria.home.lan>
References: <20230519074047.1739879-1-dhowells@redhat.com>
 <20230519074047.1739879-30-dhowells@redhat.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20230519074047.1739879-30-dhowells@redhat.com>
X-Migadu-Flow: FLOW_OUT
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Fri, May 19, 2023 at 08:40:44AM +0100, David Howells wrote:
> From: Christoph Hellwig <hch@lst.de>
> 
> Replace BIO_NO_PAGE_REF with a BIO_PAGE_REFFED flag that has the inverted
> meaning is only set when a page reference has been acquired that needs to
> be released by bio_release_pages().

What was the motivation for this patch?