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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E92FC433F5 for ; Thu, 21 Oct 2021 12:45:01 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id E2EFA60F02 for ; Thu, 21 Oct 2021 12:45:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org E2EFA60F02 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 8285C6B0074; Thu, 21 Oct 2021 08:45:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 7D7A56B0075; Thu, 21 Oct 2021 08:45:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6EE016B0078; Thu, 21 Oct 2021 08:45:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0189.hostedemail.com [216.40.44.189]) by kanga.kvack.org (Postfix) with ESMTP id 5EC636B0074 for ; Thu, 21 Oct 2021 08:45:00 -0400 (EDT) Received: from smtpin40.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 1919A181EBF24 for ; Thu, 21 Oct 2021 12:45:00 +0000 (UTC) X-FDA: 78720414360.40.DA07FDF Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf16.hostedemail.com (Postfix) with ESMTP id AF4AFF000090 for ; Thu, 21 Oct 2021 12:44:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=LC7mRcFEYrQtFmIVnfiPrgBMPLuCs796AzRXNvRQVCk=; b=4sANb6B4HPdEWzSF690I7qe2PU Jo02Sb4Xcno0v2wXF6XqSgFRoH+l43ZY492oJPU0XKW6QrRiwG8TqtsqQW+YSyhnnkuD0Zf4U8+1q 57XnTKACiv7WXb9ejHYoIsyLBGwZ//f++i+cEHDPZF243+p2au2kO9IFf50HDUNRAtv0YrgQ/r6+H YHvld8VcNphO6+OMG1FTF0nTNg9wTUftEFZMcbEs34z0k+C01FqyCPLcyrZDXpawa+jQxS+rQ7ROC /RgJ6kWcLvifQHNifULbHiE5C7wNgLKcrlLl9ZakzjCkk6YwpzVlt6PbhogsWgi1s66/FYQT9K3K2 JMlcOp3Q==; Received: from [2001:4bb8:180:8777:dd70:8011:36d9:4c23] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mdXRG-007Wyx-5f; Thu, 21 Oct 2021 12:44:54 +0000 From: Christoph Hellwig To: Andrew Morton Cc: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Jan Kara , linux-mtd@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 3/5] fs: explicitly unregister per-superblock BDIs Date: Thu, 21 Oct 2021 14:44:39 +0200 Message-Id: <20211021124441.668816-4-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211021124441.668816-1-hch@lst.de> References: <20211021124441.668816-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: AF4AFF000090 X-Stat-Signature: gsxeu33dyk5t9zzeeeztfmh1oigpb9xn Authentication-Results: imf16.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=4sANb6B4; dmarc=none; spf=none (imf16.hostedemail.com: domain of BATV+f538400d2eeb65ed2b85+6633+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+f538400d2eeb65ed2b85+6633+infradead.org+hch@bombadil.srs.infradead.org X-HE-Tag: 1634820296-443323 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Add a new SB_I_ flag to mark superblocks that have an ephemeral bdi associated with them, an unregister it when the superblock is shut down. Signed-off-by: Christoph Hellwig --- fs/super.c | 3 +++ include/linux/fs.h | 1 + 2 files changed, 4 insertions(+) diff --git a/fs/super.c b/fs/super.c index bcef3a6f4c4b5..3bfc0f8fbd5bc 100644 --- a/fs/super.c +++ b/fs/super.c @@ -476,6 +476,8 @@ void generic_shutdown_super(struct super_block *sb) spin_unlock(&sb_lock); up_write(&sb->s_umount); if (sb->s_bdi !=3D &noop_backing_dev_info) { + if (sb->s_iflags & SB_I_PERSB_BDI) + bdi_unregister(sb->s_bdi); bdi_put(sb->s_bdi); sb->s_bdi =3D &noop_backing_dev_info; } @@ -1562,6 +1564,7 @@ int super_setup_bdi_name(struct super_block *sb, ch= ar *fmt, ...) } WARN_ON(sb->s_bdi !=3D &noop_backing_dev_info); sb->s_bdi =3D bdi; + sb->s_iflags |=3D SB_I_PERSB_BDI; =20 return 0; } diff --git a/include/linux/fs.h b/include/linux/fs.h index e7a633353fd20..226de651f52e6 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1443,6 +1443,7 @@ extern int send_sigurg(struct fown_struct *fown); #define SB_I_UNTRUSTED_MOUNTER 0x00000040 =20 #define SB_I_SKIP_SYNC 0x00000100 /* Skip superblock at global sync */ +#define SB_I_PERSB_BDI 0x00000200 /* has a per-sb bdi */ =20 /* Possible states of 'frozen' field */ enum { --=20 2.30.2