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=-16.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 7676AC4338F for ; Thu, 19 Aug 2021 19:42:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5B6066108D for ; Thu, 19 Aug 2021 19:42:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235554AbhHSTnW (ORCPT ); Thu, 19 Aug 2021 15:43:22 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:35780 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234436AbhHSTnF (ORCPT ); Thu, 19 Aug 2021 15:43:05 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1629402148; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mNOq9vRSTRt64SmqSypXyJu5mHDnGeZ3glMXa6U95nQ=; b=it0MpUiGnaxTwQZAZNvRwiDJfkyWGZLzsJA7R9dfxoyk34iQEnVFZ29XIi9zpHDupwZMBb zocOUgLhhCDW/Zppq/usrE2TlZ0vm5uFYllddyrFmXcN84g2BJgKiA3VjCsZCvK87FJZaF pZrgAtauw2cNdoOESytotH/jv5FxD+k= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-388-me-WdK2eObu7TrK9jOl37Q-1; Thu, 19 Aug 2021 15:42:24 -0400 X-MC-Unique: me-WdK2eObu7TrK9jOl37Q-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8C4111082920; Thu, 19 Aug 2021 19:42:23 +0000 (UTC) Received: from max.com (unknown [10.40.194.206]) by smtp.corp.redhat.com (Postfix) with ESMTP id EC12A1B46B; Thu, 19 Aug 2021 19:42:20 +0000 (UTC) From: Andreas Gruenbacher To: Linus Torvalds , Alexander Viro , Christoph Hellwig , "Darrick J. Wong" Cc: Jan Kara , Matthew Wilcox , cluster-devel@redhat.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, ocfs2-devel@oss.oracle.com, Andreas Gruenbacher Subject: [PATCH v6 19/19] gfs2: Eliminate ip->i_gh Date: Thu, 19 Aug 2021 21:41:02 +0200 Message-Id: <20210819194102.1491495-20-agruenba@redhat.com> In-Reply-To: <20210819194102.1491495-1-agruenba@redhat.com> References: <20210819194102.1491495-1-agruenba@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that gfs2_file_buffered_write is the only remaining user of ip->i_gh, we can allocate a glock holder on the stack and use that instead. This is slightly complicated by the fact that we're using ip->i_gh for the statfs inode in gfs2_file_buffered_write as well. Since writing to the statfs inode isn't very common, allocate the statfs holder dynamically when needed. Signed-off-by: Andreas Gruenbacher --- fs/gfs2/file.c | 42 +++++++++++++++++++++++++----------------- fs/gfs2/incore.h | 3 +-- 2 files changed, 26 insertions(+), 19 deletions(-) diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 2cf3466b9dde..9729cb3483c0 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -1010,12 +1010,15 @@ static ssize_t gfs2_file_read_iter(struct kiocb *iocb, struct iov_iter *to) return written ? written : ret; } -static ssize_t gfs2_file_buffered_write(struct kiocb *iocb, struct iov_iter *from) +static ssize_t gfs2_file_buffered_write(struct kiocb *iocb, + struct iov_iter *from, + struct gfs2_holder *gh) { struct file *file = iocb->ki_filp; struct inode *inode = file_inode(file); struct gfs2_inode *ip = GFS2_I(inode); struct gfs2_sbd *sdp = GFS2_SB(inode); + struct gfs2_holder *statfs_gh = NULL; size_t prev_count = 0, window_size = 0; size_t read = 0; ssize_t ret; @@ -1026,9 +1029,15 @@ static ssize_t gfs2_file_buffered_write(struct kiocb *iocb, struct iov_iter *fro * inode glock, fault in the pages manually, and retry. */ - gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ip->i_gh); + if (inode == sdp->sd_rindex) { + statfs_gh = kmalloc(sizeof(*statfs_gh), GFP_NOFS); + if (!statfs_gh) + return -ENOMEM; + } + + gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, gh); retry: - ret = gfs2_glock_nq(&ip->i_gh); + ret = gfs2_glock_nq(gh); if (ret) goto out_uninit; retry_under_glock: @@ -1036,7 +1045,7 @@ static ssize_t gfs2_file_buffered_write(struct kiocb *iocb, struct iov_iter *fro struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); ret = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, - GL_NOCACHE, &m_ip->i_gh); + GL_NOCACHE, statfs_gh); if (ret) goto out_unlock; } @@ -1049,20 +1058,17 @@ static ssize_t gfs2_file_buffered_write(struct kiocb *iocb, struct iov_iter *fro if (ret > 0) read += ret; - if (inode == sdp->sd_rindex) { - struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); - - gfs2_glock_dq_uninit(&m_ip->i_gh); - } + if (inode == sdp->sd_rindex) + gfs2_glock_dq_uninit(statfs_gh); if (unlikely(iov_iter_count(from) && (ret > 0 || ret == -EFAULT)) && should_fault_in_pages(from, &prev_count, &window_size)) { size_t leftover; - gfs2_holder_allow_demote(&ip->i_gh); + gfs2_holder_allow_demote(gh); leftover = fault_in_iov_iter_readable(from, window_size); - gfs2_holder_disallow_demote(&ip->i_gh); + gfs2_holder_disallow_demote(gh); if (leftover != window_size) { - if (!gfs2_holder_queued(&ip->i_gh)) { + if (!gfs2_holder_queued(gh)) { if (read) goto out_uninit; goto retry; @@ -1071,10 +1077,12 @@ static ssize_t gfs2_file_buffered_write(struct kiocb *iocb, struct iov_iter *fro } } out_unlock: - if (gfs2_holder_queued(&ip->i_gh)) - gfs2_glock_dq(&ip->i_gh); + if (gfs2_holder_queued(gh)) + gfs2_glock_dq(gh); out_uninit: - gfs2_holder_uninit(&ip->i_gh); + gfs2_holder_uninit(gh); + if (statfs_gh) + kfree(statfs_gh); return read ? read : ret; } @@ -1129,7 +1137,7 @@ static ssize_t gfs2_file_write_iter(struct kiocb *iocb, struct iov_iter *from) goto out_unlock; iocb->ki_flags |= IOCB_DSYNC; - buffered = gfs2_file_buffered_write(iocb, from); + buffered = gfs2_file_buffered_write(iocb, from, &gh); if (unlikely(buffered <= 0)) { if (!ret) ret = buffered; @@ -1151,7 +1159,7 @@ static ssize_t gfs2_file_write_iter(struct kiocb *iocb, struct iov_iter *from) if (!ret || ret2 > 0) ret += ret2; } else { - ret = gfs2_file_buffered_write(iocb, from); + ret = gfs2_file_buffered_write(iocb, from, &gh); if (likely(ret > 0)) { iocb->ki_pos += ret; ret = generic_write_sync(iocb, ret); diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h index e73a81db0714..87abdcc1de0c 100644 --- a/fs/gfs2/incore.h +++ b/fs/gfs2/incore.h @@ -387,9 +387,8 @@ struct gfs2_inode { u64 i_generation; u64 i_eattr; unsigned long i_flags; /* GIF_... */ - struct gfs2_glock *i_gl; /* Move into i_gh? */ + struct gfs2_glock *i_gl; struct gfs2_holder i_iopen_gh; - struct gfs2_holder i_gh; /* for prepare/commit_write only */ struct gfs2_qadata *i_qadata; /* quota allocation data */ struct gfs2_holder i_rgd_gh; struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */ -- 2.26.3