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=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 606A9C28CBC for ; Wed, 6 May 2020 10:43:00 +0000 (UTC) Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2979520663 for ; Wed, 6 May 2020 10:43:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=sourceforge.net header.i=@sourceforge.net header.b="BbuVdPBx"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=sf.net header.i=@sf.net header.b="Pcg8R90W" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2979520663 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linux-f2fs-devel-bounces@lists.sourceforge.net Received: from [127.0.0.1] (helo=sfs-ml-1.v29.lw.sourceforge.com) by sfs-ml-1.v29.lw.sourceforge.com with esmtp (Exim 4.90_1) (envelope-from ) id 1jWHVu-0000SC-1G; Wed, 06 May 2020 10:42:54 +0000 Received: from [172.30.20.202] (helo=mx.sourceforge.net) by sfs-ml-1.v29.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jWHVs-0000Rn-GU for linux-f2fs-devel@lists.sourceforge.net; Wed, 06 May 2020 10:42:52 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Type:MIME-Version:Message-ID:Date:Subject: CC:To:From:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=vkrR+MLK3DyXamUyxnI7uExoUaza6dDRH5cPTUxIDjc=; b=BbuVdPBxV+rzRxc+f8il8oXUpI vlctGR2yG5SVNDSqRL2v20MFPlgXMuUlhutgsiuM7FiNY0ZmeX2Q3t4Ni6PjMrH3GOvzAiiiFLTwP 8KjFOy3X/lmlyh/c30Smo0j9qO8TM5BDkD4XVi87hdRIgPESBm+JopRpqCrwIIF4/y/o=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From:Sender: Reply-To:Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date :Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Id:List-Help:List-Unsubscribe:List-Subscribe:List-Post: List-Owner:List-Archive; bh=vkrR+MLK3DyXamUyxnI7uExoUaza6dDRH5cPTUxIDjc=; b=P cg8R90WHbVtM41Aasj4vopgcH8v27DTLlTmJ+OfCeGPQl8ocYKVNXxdb8079VwCAV997PIGljluqH pxyOttu7iH8dh85aJO8lj21YAiQVcwwkEUheIIc7ZyN5ydmSPC4xdgKjVj9Dgz3mfy59udMqPH3FN poKQqYsKeSGHeOd0=; Received: from szxga07-in.huawei.com ([45.249.212.35] helo=huawei.com) by sfi-mx-4.v28.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92.2) id 1jWHVq-00Cgvt-Mg for linux-f2fs-devel@lists.sourceforge.net; Wed, 06 May 2020 10:42:52 +0000 Received: from DGGEMS404-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id A981B7F4B966CBE7C6E2; Wed, 6 May 2020 18:42:43 +0800 (CST) Received: from szvp000203569.huawei.com (10.120.216.130) by DGGEMS404-HUB.china.huawei.com (10.3.19.204) with Microsoft SMTP Server id 14.3.487.0; Wed, 6 May 2020 18:42:33 +0800 From: Chao Yu To: Date: Wed, 6 May 2020 18:42:18 +0800 Message-ID: <20200506104218.121804-1-yuchao0@huawei.com> X-Mailer: git-send-email 2.18.0.rc1 MIME-Version: 1.0 X-Originating-IP: [10.120.216.130] X-CFilter-Loop: Reflected X-Headers-End: 1jWHVq-00Cgvt-Mg Subject: [f2fs-dev] [PATCH] f2fs: shrink spinlock coverage X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net In f2fs_try_to_free_nids(), .nid_list_lock spinlock critical region will increase as expected shrink number increase, to avoid spining other CPUs for long time, it's better to implement like extent cache and nats shrinker. Signed-off-by: Chao Yu --- fs/f2fs/node.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 4da0d8713df5..a0cf66ace41e 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -2488,7 +2488,6 @@ void f2fs_alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) int f2fs_try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink) { struct f2fs_nm_info *nm_i = NM_I(sbi); - struct free_nid *i, *next; int nr = nr_shrink; if (nm_i->nid_cnt[FREE_NID] <= MAX_FREE_NIDS) @@ -2498,14 +2497,22 @@ int f2fs_try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink) return 0; spin_lock(&nm_i->nid_list_lock); - list_for_each_entry_safe(i, next, &nm_i->free_nid_list, list) { - if (nr_shrink <= 0 || - nm_i->nid_cnt[FREE_NID] <= MAX_FREE_NIDS) + while (nr_shrink) { + struct free_nid *i; + + if (nm_i->nid_cnt[FREE_NID] <= MAX_FREE_NIDS) break; + i = list_first_entry(&nm_i->free_nid_list, + struct free_nid, list); + list_del(&i->list); + spin_unlock(&nm_i->nat_list_lock); + __remove_free_nid(sbi, i, FREE_NID); kmem_cache_free(free_nid_slab, i); nr_shrink--; + + spin_lock(&nm_i->nid_list_lock); } spin_unlock(&nm_i->nid_list_lock); mutex_unlock(&nm_i->build_lock); -- 2.18.0.rc1 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel