From patchwork Wed Dec 9 13:11:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yafang Shao X-Patchwork-Id: 11961351 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 7926CC433FE for ; Wed, 9 Dec 2020 13:13:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5284C23BC7 for ; Wed, 9 Dec 2020 13:13:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732166AbgLINNU (ORCPT ); Wed, 9 Dec 2020 08:13:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52830 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729181AbgLINNH (ORCPT ); Wed, 9 Dec 2020 08:13:07 -0500 Received: from mail-qt1-x842.google.com (mail-qt1-x842.google.com [IPv6:2607:f8b0:4864:20::842]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1F2DDC061794; Wed, 9 Dec 2020 05:12:27 -0800 (PST) Received: by mail-qt1-x842.google.com with SMTP id z3so807640qtw.9; Wed, 09 Dec 2020 05:12:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=iBZKS7fZyjdTYTaO3rtutG8028bfWaEOmNu0KLWmO18=; b=HsxN5ATN5b8eLKXY4ZeibMTxltQSgGAeusNM1yE9jrmciX19XFhHuP6b8i+KYmQ7RA 8i78cmkmxPwzPYRbL5jkQ3KA7RXrQJN4V5N4OwXQjmb+0t0RJXbDP2OlQI8hctib0CGh iG7lMvmjJ0zsDyuqROWpQws07Q0ZpoBOwd6ZgIT+8ChDIVchr2s/9GBhK7xwICRS6xe2 bXq/h2nyxJc4y80zJnXc4zxqK492XYFV74pvyWTUknrfncjKW/WIqUfoQJ1SWampGOWI 64p+yPxtiYDVGmdww+sT46Mza8xf0Pc2xVnpuEM4oSVTfLIiYWgx8uI63mTb2CCM8S0l Jd2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=iBZKS7fZyjdTYTaO3rtutG8028bfWaEOmNu0KLWmO18=; b=RUM8SpFK32atm6FLyIQcR15UIVfWMUQBE7B7crC6Nv9CH8aBvxJg2OwUvm1XYQfWrs QlrcQ/sXqXxJ6Cj8XfifTalSpb40fkUx8MvkoPD9VOk5HvhrA7Cb14rNv2mso4vTbs5B nTS+xQ05hcMqBKRJRQrdrW6g+Rhic8qPMUoRpyVNyu/39ViW3tkzdJGHPcCR32V9yJD8 sfDuAiYbyVV2Bl1APFWRLwuhWDFI/Z0MN8RUPDDfnSf3JXqDUoRR6CfaqjpLgy8L96IL WeFPTgWCWJU1p7YGUnTkKdNzySw8K81iXumivGZ6GXvAQzcNXIMgq1hnSnW999glYt8P R/ug== X-Gm-Message-State: AOAM531U/ua43eaUhnmF+lOU2ecjTGmwpdE23rvELgThPLZleBYSdagb WKIhZ/TVQiO/v9cj0jfaIEjxum0tzXXQpw== X-Google-Smtp-Source: ABdhPJwwOCvQR3EmCa5QLZLnDJYam2cyyD1uwIzB+gbjBFnQ/bKUFYsFwLrllWPQx5I4SJCh6tS2eQ== X-Received: by 2002:ac8:2bd2:: with SMTP id n18mr3081861qtn.260.1607519544946; Wed, 09 Dec 2020 05:12:24 -0800 (PST) Received: from localhost.localdomain ([50.236.19.102]) by smtp.gmail.com with ESMTPSA id u72sm938114qka.15.2020.12.09.05.12.18 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 09 Dec 2020 05:12:23 -0800 (PST) From: Yafang Shao To: darrick.wong@oracle.com, willy@infradead.org, david@fromorbit.com, hch@infradead.org, mhocko@kernel.org, akpm@linux-foundation.org, dhowells@redhat.com, jlayton@redhat.com Cc: linux-fsdevel@vger.kernel.org, linux-cachefs@redhat.com, linux-xfs@vger.kernel.org, linux-mm@kvack.org, Yafang Shao , Christoph Hellwig Subject: [PATCH v12 2/4] xfs: use memalloc_nofs_{save,restore} in xfs transaction Date: Wed, 9 Dec 2020 21:11:44 +0800 Message-Id: <20201209131146.67289-3-laoar.shao@gmail.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20201209131146.67289-1-laoar.shao@gmail.com> References: <20201209131146.67289-1-laoar.shao@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Introduce a new API to mark the start and end of XFS transactions. For now, just save and restore the memalloc_nofs flags. The new helpers as follows, - xfs_trans_context_set Mark the start of XFS transactions - xfs_trans_context_clear Mark the end of XFS transactions Cc: Matthew Wilcox (Oracle) Cc: Christoph Hellwig Cc: Dave Chinner Cc: Michal Hocko Reviewed-by: Darrick J. Wong Signed-off-by: Yafang Shao --- fs/xfs/xfs_aops.c | 4 ++-- fs/xfs/xfs_linux.h | 4 ---- fs/xfs/xfs_trans.c | 13 +++++++------ fs/xfs/xfs_trans.h | 12 ++++++++++++ 4 files changed, 21 insertions(+), 12 deletions(-) diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 4304c6416fbb..2371187b7615 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -62,7 +62,7 @@ xfs_setfilesize_trans_alloc( * We hand off the transaction to the completion thread now, so * clear the flag here. */ - current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); + xfs_trans_context_clear(tp); return 0; } @@ -125,7 +125,7 @@ xfs_setfilesize_ioend( * thus we need to mark ourselves as being in a transaction manually. * Similarly for freeze protection. */ - current_set_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); + xfs_trans_context_set(tp); __sb_writers_acquired(VFS_I(ip)->i_sb, SB_FREEZE_FS); /* we abort the update if there was an IO error */ diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h index 5b7a1e201559..6ab0f8043c73 100644 --- a/fs/xfs/xfs_linux.h +++ b/fs/xfs/xfs_linux.h @@ -102,10 +102,6 @@ typedef __u32 xfs_nlink_t; #define xfs_cowb_secs xfs_params.cowb_timer.val #define current_cpu() (raw_smp_processor_id()) -#define current_set_flags_nested(sp, f) \ - (*(sp) = current->flags, current->flags |= (f)) -#define current_restore_flags_nested(sp, f) \ - (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) #define NBBY 8 /* number of bits per byte */ diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index c94e71f741b6..11d390f0d3f2 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -154,7 +154,7 @@ xfs_trans_reserve( bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; /* Mark this thread as being in a transaction */ - current_set_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); + xfs_trans_context_set(tp); /* * Attempt to reserve the needed disk blocks by decrementing @@ -164,7 +164,7 @@ xfs_trans_reserve( if (blocks > 0) { error = xfs_mod_fdblocks(mp, -((int64_t)blocks), rsvd); if (error != 0) { - current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); + xfs_trans_context_clear(tp); return -ENOSPC; } tp->t_blk_res += blocks; @@ -241,7 +241,7 @@ xfs_trans_reserve( tp->t_blk_res = 0; } - current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); + xfs_trans_context_clear(tp); return error; } @@ -878,7 +878,7 @@ __xfs_trans_commit( xfs_log_commit_cil(mp, tp, &commit_lsn, regrant); - current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); + xfs_trans_context_clear(tp); xfs_trans_free(tp); /* @@ -910,7 +910,8 @@ __xfs_trans_commit( xfs_log_ticket_ungrant(mp->m_log, tp->t_ticket); tp->t_ticket = NULL; } - current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); + + xfs_trans_context_clear(tp); xfs_trans_free_items(tp, !!error); xfs_trans_free(tp); @@ -971,7 +972,7 @@ xfs_trans_cancel( } /* mark this thread as no longer being in a transaction */ - current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); + xfs_trans_context_clear(tp); xfs_trans_free_items(tp, dirty); xfs_trans_free(tp); diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h index 084658946cc8..44b11c64a15e 100644 --- a/fs/xfs/xfs_trans.h +++ b/fs/xfs/xfs_trans.h @@ -268,4 +268,16 @@ xfs_trans_item_relog( return lip->li_ops->iop_relog(lip, tp); } +static inline void +xfs_trans_context_set(struct xfs_trans *tp) +{ + tp->t_pflags = memalloc_nofs_save(); +} + +static inline void +xfs_trans_context_clear(struct xfs_trans *tp) +{ + memalloc_nofs_restore(tp->t_pflags); +} + #endif /* __XFS_TRANS_H__ */