From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jaegeuk Kim Subject: [PATCH 4/5] f2fs: add maximum prefree segments Date: Thu, 14 Jul 2016 17:46:28 -0700 Message-ID: <20160715004629.43143-4-jaegeuk@kernel.org> References: <20160715004629.43143-1-jaegeuk@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1bNrHH-0004XJ-Hk for linux-f2fs-devel@lists.sourceforge.net; Fri, 15 Jul 2016 00:46:51 +0000 Received: from mail.kernel.org ([198.145.29.136]) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1bNrH9-00063k-2e for linux-f2fs-devel@lists.sourceforge.net; Fri, 15 Jul 2016 00:46:51 +0000 In-Reply-To: <20160715004629.43143-1-jaegeuk@kernel.org> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Jaegeuk Kim In 1TB storage, we need to admit 22841 prefree segments, which can consume too much segments. This patch sets 8GB in max. prefree segments in that case. Signed-off-by: Jaegeuk Kim --- fs/f2fs/segment.c | 3 +++ fs/f2fs/segment.h | 1 + 2 files changed, 4 insertions(+) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 08f6c0b..e87aa05 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -2409,6 +2409,9 @@ int build_segment_manager(struct f2fs_sb_info *sbi) sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr); sm_info->rec_prefree_segments = sm_info->main_segments * DEF_RECLAIM_PREFREE_SEGMENTS / 100; + if (sm_info->rec_prefree_segments > DEF_MAX_RECLAIM_PREFREE_SEGMENTS) + sm_info->rec_prefree_segments = DEF_MAX_RECLAIM_PREFREE_SEGMENTS; + if (!test_opt(sbi, LFS)) sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC; sm_info->min_ipu_util = DEF_MIN_IPU_UTIL; diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index 57d450f..b33f73e 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -16,6 +16,7 @@ #define NULL_SECNO ((unsigned int)(~0)) #define DEF_RECLAIM_PREFREE_SEGMENTS 5 /* 5% over total segments */ +#define DEF_MAX_RECLAIM_PREFREE_SEGMENTS 4096 /* 8GB in maximum */ /* L: Logical segment # in volume, R: Relative segment # in main area */ #define GET_L2R_SEGNO(free_i, segno) (segno - free_i->start_segno) -- 2.8.3 ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev