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=-8.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 79EFDC3B18C for ; Thu, 13 Feb 2020 19:52:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 55F462168B for ; Thu, 13 Feb 2020 19:52:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=toxicpanda-com.20150623.gappssmtp.com header.i=@toxicpanda-com.20150623.gappssmtp.com header.b="vqV1rSBz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727822AbgBMTwP (ORCPT ); Thu, 13 Feb 2020 14:52:15 -0500 Received: from mail-pg1-f193.google.com ([209.85.215.193]:45402 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726390AbgBMTwP (ORCPT ); Thu, 13 Feb 2020 14:52:15 -0500 Received: by mail-pg1-f193.google.com with SMTP id b9so3533326pgk.12 for ; Thu, 13 Feb 2020 11:52:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=toxicpanda-com.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=RlIGL4VBhydy60nyRhAQZ/+XeeQBeDRGjmVGlkgczFY=; b=vqV1rSBzMJv8I2CCK77lX565f1nbldEm853SNXFkb02apf2B/wxsIEog92JxlkyHHK WK5enjLIwRVenR+GDj5tnLVB/iQcP/GmBbHSkcSzA8SanZPfXVPuxl7/wcb+VKlAIG7w qMUY1ySBR8Q2Gb6Yjg+iS6n2DKEC+3A/36c0svCljeiNcMmamHndPdWA3QPxHWIvhptv vzN+L9aWmmVa4zfVqqVzC2Li50+BqYuJejbPhG+eoHdcIcrprYls7Y3EzFyBCb5T7qWS 4bnOXuUbCdnr0xfjQ6i4BXjLuhlxYYxxhKERB0pnwvjJAEtDcSmFaFcsG7BwUhazOGOu Eiiw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=RlIGL4VBhydy60nyRhAQZ/+XeeQBeDRGjmVGlkgczFY=; b=Ss8p0i8+0niVD8HwZtTR+cWWjg90ezevdci4S1bTjqPM+MsPFERE2KCA1hPGtkHTOU ytNbnENoRSf7Tscqg6oLhG+FKnrlZCEARfQt62X+yJ+CGEOAeghotjH+tOpx7r30dAov HjmXlg5Y4a4R3zMbbpDjMglsDFfx6XfL3oS7P1etC44GRMcXGJwyEiPJNVDSki++y1E+ 4WmfGykyQPwek564qFOSKSvhdoVqM0nd3MVI9Mnf2j2bLkaJSbOApLwPgwYHZiV/nzyR kyiQXba81OdGfsyrUhlT4mOBCnUyG70c+DmoYS8RQIqhpL0kJ+giNxvfXYrVMntbzjc+ 1KGQ== X-Gm-Message-State: APjAAAXsq7pOYUhQ3jew34ii/Zrq8lLpx87iB1wLCU7zdHMiLQdgIRQv GhS+9OCSIWVCUR1wlYDq7p1mxw== X-Google-Smtp-Source: APXvYqzynh2RHHyryFTAEFEzqu74DbSCGKRdhIzvCTidYY4rl2w7swF0DdDrECfl+LqGDW6ihTIOew== X-Received: by 2002:a62:2b8a:: with SMTP id r132mr14887954pfr.56.1581623533239; Thu, 13 Feb 2020 11:52:13 -0800 (PST) Received: from ?IPv6:2620:10d:c085:21cf::1150? ([2620:10d:c090:400::5:249c]) by smtp.gmail.com with ESMTPSA id n2sm4071334pgn.71.2020.02.13.11.52.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 13 Feb 2020 11:52:12 -0800 (PST) Subject: Re: [PATCH v2 19/21] btrfs: factor out chunk_allocation_failed() To: Naohiro Aota , linux-btrfs@vger.kernel.org, David Sterba Cc: Chris Mason , Nikolay Borisov , Damien Le Moal , Johannes Thumshirn , Hannes Reinecke , Anand Jain , linux-fsdevel@vger.kernel.org References: <20200212072048.629856-1-naohiro.aota@wdc.com> <20200212072048.629856-20-naohiro.aota@wdc.com> From: Josef Bacik Message-ID: Date: Thu, 13 Feb 2020 14:52:08 -0500 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200212072048.629856-20-naohiro.aota@wdc.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 2/12/20 2:20 AM, Naohiro Aota wrote: > Factor out chunk_allocation_failed() from find_free_extent_update_loop(). > This function is called when it failed to allocate a chunk. The function > can modify "ffe_ctl->loop" and return 0 to continue with the next stage. > Or, it can return -ENOSPC to give up here. > > Signed-off-by: Naohiro Aota > --- > fs/btrfs/extent-tree.c | 24 ++++++++++++++++-------- > 1 file changed, 16 insertions(+), 8 deletions(-) > > diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c > index efc653e6be29..8f0d489f76fa 100644 > --- a/fs/btrfs/extent-tree.c > +++ b/fs/btrfs/extent-tree.c > @@ -3748,6 +3748,21 @@ static void found_extent(struct find_free_extent_ctl *ffe_ctl, > } > } > > +static int chunk_allocation_failed(struct find_free_extent_ctl *ffe_ctl) > +{ > + switch (ffe_ctl->policy) { > + case BTRFS_EXTENT_ALLOC_CLUSTERED: > + /* > + * If we can't allocate a new chunk we've already looped through > + * at least once, move on to the NO_EMPTY_SIZE case. > + */ > + ffe_ctl->loop = LOOP_NO_EMPTY_SIZE; > + return 0; > + default: > + BUG(); > + } > +} > + > /* > * Return >0 means caller needs to re-search for free extent > * Return 0 means we have the needed free extent. > @@ -3819,19 +3834,12 @@ static int find_free_extent_update_loop(struct btrfs_fs_info *fs_info, > ret = btrfs_chunk_alloc(trans, ffe_ctl->flags, > CHUNK_ALLOC_FORCE); > > - /* > - * If we can't allocate a new chunk we've already looped > - * through at least once, move on to the NO_EMPTY_SIZE > - * case. > - */ > if (ret == -ENOSPC) > - ffe_ctl->loop = LOOP_NO_EMPTY_SIZE; > + ret = chunk_allocation_failed(ffe_ctl); > > /* Do not bail out on ENOSPC since we can do more. */ > if (ret < 0 && ret != -ENOSPC) > btrfs_abort_transaction(trans, ret); > - else > - ret = 0; You can't delete this, btrfs_chunk_alloc() will return 1 if it succeeded, and we'll leak that out somewhere and bad things will happen. Thanks, Josef