From nobody Thu Sep 11 18:11:47 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EB540C6FD1C for ; Sat, 25 Mar 2023 08:15:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232118AbjCYIPY (ORCPT ); Sat, 25 Mar 2023 04:15:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55844 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231950AbjCYIOf (ORCPT ); Sat, 25 Mar 2023 04:14:35 -0400 Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3AAA315147; Sat, 25 Mar 2023 01:14:18 -0700 (PDT) Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 32P7DY3o032110; Sat, 25 Mar 2023 08:14:14 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=HSDS+Qx+SjPNvm1jwTuGxSQbPBt82pI2ogEXSkF/j4Y=; b=EO0PJfrUgfM6JWDitj68++NVjWe2G4LiXFRL6gxjWSFqoyTx1m8iLD3CxCJLRcpkwV3B tNolQ5zmuyEcswsbWyDermrhWZp3GgdzzRqNcPvRvMotfIE2MeBgknGOUa5688FN+p4I 4LOqZR5yf8nE6GXHEjLeIIb3xW+QVpqCxHP52MY1geokeHIIkjvSteJnPUeYOv7V0Y1+ 5mPzB3wblKdZikTVxxfWMLCpfyTy6f5zbtUFvlfBCQ71T6rrugPb+FwYwJlhbDIgJvsf ytJ2pllRJSXWONoh+AkrW5IcKl03714zCJDU1Xm8nHGecn5eBMe7ymHMJhKfMoLy7DR8 /A== Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com (PPS) with ESMTPS id 3phvckgpfa-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 25 Mar 2023 08:14:14 +0000 Received: from m0098419.ppops.net (m0098419.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 32P8CQie005766; Sat, 25 Mar 2023 08:14:13 GMT Received: from ppma06ams.nl.ibm.com (66.31.33a9.ip4.static.sl-reverse.com [169.51.49.102]) by mx0b-001b2d01.pphosted.com (PPS) with ESMTPS id 3phvckgpf1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 25 Mar 2023 08:14:13 +0000 Received: from pps.filterd (ppma06ams.nl.ibm.com [127.0.0.1]) by ppma06ams.nl.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 32P2TNbY028881; Sat, 25 Mar 2023 08:14:12 GMT Received: from smtprelay05.fra02v.mail.ibm.com ([9.218.2.225]) by ppma06ams.nl.ibm.com (PPS) with ESMTPS id 3phr7fg902-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 25 Mar 2023 08:14:11 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay05.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 32P8E9R751773836 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 25 Mar 2023 08:14:09 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 54C6520043; Sat, 25 Mar 2023 08:14:09 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 47C3720040; Sat, 25 Mar 2023 08:14:07 +0000 (GMT) Received: from li-bb2b2a4c-3307-11b2-a85c-8fa5c3a69313.ibm.com (unknown [9.43.63.61]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Sat, 25 Mar 2023 08:14:07 +0000 (GMT) From: Ojaswin Mujoo To: linux-ext4@vger.kernel.org, "Theodore Ts'o" Cc: Ritesh Harjani , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Jan Kara , rookxu , Ritesh Harjani Subject: [PATCH v6 9/9] ext4: Remove the logic to trim inode PAs Date: Sat, 25 Mar 2023 13:43:42 +0530 Message-Id: X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: S8-Q27axJGmK-sV5o5Dx0SXTLlgwZX_R X-Proofpoint-GUID: nV6IozePmPsOLDEtr1TpLW-cckfn6pbb X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-24_11,2023-03-24_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 clxscore=1015 phishscore=0 mlxlogscore=999 spamscore=0 impostorscore=0 lowpriorityscore=0 suspectscore=0 mlxscore=0 adultscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2303250065 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Earlier, inode PAs were stored in a linked list. This caused a need to periodically trim the list down inorder to avoid growing it to a very large size, as this would severly affect performance during list iteration. Recent patches changed this list to an rbtree, and since the tree scales up much better, we no longer need to have the trim functionality, hence remove it. Signed-off-by: Ojaswin Mujoo Reviewed-by: Ritesh Harjani (IBM) Reviewed-by: Jan Kara --- Documentation/admin-guide/ext4.rst | 3 --- fs/ext4/ext4.h | 1 - fs/ext4/mballoc.c | 20 -------------------- fs/ext4/mballoc.h | 5 ----- fs/ext4/sysfs.c | 2 -- 5 files changed, 31 deletions(-) diff --git a/Documentation/admin-guide/ext4.rst b/Documentation/admin-guide= /ext4.rst index 4c559e08d11e..5740d85439ff 100644 --- a/Documentation/admin-guide/ext4.rst +++ b/Documentation/admin-guide/ext4.rst @@ -489,9 +489,6 @@ Files in /sys/fs/ext4/: multiple of this tuning parameter if the stripe size is not set in= the ext4 superblock =20 - mb_max_inode_prealloc - The maximum length of per-inode ext4_prealloc_space list. - mb_max_to_scan The maximum number of extents the multiblock allocator will search= to find the best extent. diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 8cf955b1dca5..993d3284b430 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1613,7 +1613,6 @@ struct ext4_sb_info { unsigned int s_mb_stats; unsigned int s_mb_order2_reqs; unsigned int s_mb_group_prealloc; - unsigned int s_mb_max_inode_prealloc; unsigned int s_max_dir_size_kb; /* where last allocation was done - for stream allocation */ unsigned long s_mb_last_group; diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index f7603dafb672..d5837c5acbc7 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -3417,7 +3417,6 @@ int ext4_mb_init(struct super_block *sb) sbi->s_mb_stats =3D MB_DEFAULT_STATS; sbi->s_mb_stream_request =3D MB_DEFAULT_STREAM_THRESHOLD; sbi->s_mb_order2_reqs =3D MB_DEFAULT_ORDER2_REQS; - sbi->s_mb_max_inode_prealloc =3D MB_DEFAULT_MAX_INODE_PREALLOC; /* * The default group preallocation is 512, which for 4k block * sizes translates to 2 megabytes. However for bigalloc file @@ -5600,29 +5599,11 @@ static void ext4_mb_add_n_trim(struct ext4_allocati= on_context *ac) return ; } =20 -/* - * if per-inode prealloc list is too long, trim some PA - */ -static void ext4_mb_trim_inode_pa(struct inode *inode) -{ - struct ext4_inode_info *ei =3D EXT4_I(inode); - struct ext4_sb_info *sbi =3D EXT4_SB(inode->i_sb); - int count, delta; - - count =3D atomic_read(&ei->i_prealloc_active); - delta =3D (sbi->s_mb_max_inode_prealloc >> 2) + 1; - if (count > sbi->s_mb_max_inode_prealloc + delta) { - count -=3D sbi->s_mb_max_inode_prealloc; - ext4_discard_preallocations(inode, count); - } -} - /* * release all resource we used in allocation */ static int ext4_mb_release_context(struct ext4_allocation_context *ac) { - struct inode *inode =3D ac->ac_inode; struct ext4_sb_info *sbi =3D EXT4_SB(ac->ac_sb); struct ext4_prealloc_space *pa =3D ac->ac_pa; if (pa) { @@ -5658,7 +5639,6 @@ static int ext4_mb_release_context(struct ext4_alloca= tion_context *ac) if (ac->ac_flags & EXT4_MB_HINT_GROUP_ALLOC) mutex_unlock(&ac->ac_lg->lg_mutex); ext4_mb_collect_stats(ac); - ext4_mb_trim_inode_pa(inode); return 0; } =20 diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h index f8e8ee493867..6d85ee8674a6 100644 --- a/fs/ext4/mballoc.h +++ b/fs/ext4/mballoc.h @@ -73,11 +73,6 @@ */ #define MB_DEFAULT_GROUP_PREALLOC 512 =20 -/* - * maximum length of inode prealloc list - */ -#define MB_DEFAULT_MAX_INODE_PREALLOC 512 - /* * Number of groups to search linearly before performing group scanning * optimization. diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c index 12d6252e3e22..3042bc605bbf 100644 --- a/fs/ext4/sysfs.c +++ b/fs/ext4/sysfs.c @@ -214,7 +214,6 @@ EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); -EXT4_RW_ATTR_SBI_UI(mb_max_inode_prealloc, s_mb_max_inode_prealloc); EXT4_RW_ATTR_SBI_UI(mb_max_linear_groups, s_mb_max_linear_groups); EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); EXT4_ATTR(trigger_fs_error, 0200, trigger_test_error); @@ -264,7 +263,6 @@ static struct attribute *ext4_attrs[] =3D { ATTR_LIST(mb_order2_req), ATTR_LIST(mb_stream_req), ATTR_LIST(mb_group_prealloc), - ATTR_LIST(mb_max_inode_prealloc), ATTR_LIST(mb_max_linear_groups), ATTR_LIST(max_writeback_mb_bump), ATTR_LIST(extent_max_zeroout_kb), --=20 2.31.1