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=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 19926C46475 for ; Thu, 25 Oct 2018 08:19:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DB37920834 for ; Thu, 25 Oct 2018 08:19:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DB37920834 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727010AbeJYQvY (ORCPT ); Thu, 25 Oct 2018 12:51:24 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:38402 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726473AbeJYQvY (ORCPT ); Thu, 25 Oct 2018 12:51:24 -0400 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 3E62A5C290865; Thu, 25 Oct 2018 16:19:40 +0800 (CST) Received: from szvp000201624.huawei.com (10.120.216.130) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.408.0; Thu, 25 Oct 2018 16:19:35 +0800 From: Chao Yu To: CC: , , , Chao Yu Subject: [PATCH v2 3/3] f2fs: export migration_granularity sysfs entry Date: Thu, 25 Oct 2018 16:19:28 +0800 Message-ID: <20181025081928.88953-1-yuchao0@huawei.com> X-Mailer: git-send-email 2.18.0.rc1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.120.216.130] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add one sysfs entry to control migration granularity of GC in large section f2fs, it can be tuned to mitigate heavy overhead of migrating huge number of blocks in large section. Signed-off-by: Chao Yu --- v2: - fix incorrect command name parsing. Documentation/ABI/testing/sysfs-fs-f2fs | 9 +++++++++ fs/f2fs/sysfs.c | 7 +++++++ 2 files changed, 16 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 3ac41774ad3c..a7ce33199457 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -92,6 +92,15 @@ Contact: "Jaegeuk Kim" Description: Controls the number of trials to find a victim segment. +What: /sys/fs/f2fs//migration_granularity +Date: October 2018 +Contact: "Chao Yu" +Description: + Controls migration granularity of garbage collection on large + section, it can let GC move partial segment{s} of one section + in one GC cycle, so that dispersing heavy overhead GC to + multiple lightweight one. + What: /sys/fs/f2fs//dir_level Date: March 2014 Contact: "Jaegeuk Kim" diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index 240e4881279e..0575edbe3ed6 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -246,6 +246,11 @@ static ssize_t __sbi_store(struct f2fs_attr *a, return count; } + if (!strcmp(a->attr.name, "migration_granularity")) { + if (t == 0 || t > sbi->segs_per_sec) + return -EINVAL; + } + if (!strcmp(a->attr.name, "trim_sections")) return -EINVAL; @@ -406,6 +411,7 @@ F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages); F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); +F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]); @@ -460,6 +466,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(min_hot_blocks), ATTR_LIST(min_ssr_sections), ATTR_LIST(max_victim_search), + ATTR_LIST(migration_granularity), ATTR_LIST(dir_level), ATTR_LIST(ram_thresh), ATTR_LIST(ra_nid_pages), -- 2.18.0.rc1