From patchwork Wed Jan 22 21:10:17 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jaegeuk Kim X-Patchwork-Id: 13947666 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 84044C0218C for ; Wed, 22 Jan 2025 21:13:49 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-2.v29.lw.sourceforge.com) by sfs-ml-2.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1tai2n-0001Qn-52; Wed, 22 Jan 2025 21:13:49 +0000 Received: from [172.30.29.66] (helo=mx.sourceforge.net) by sfs-ml-2.v29.lw.sourceforge.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1tai2l-0001Qh-GZ for linux-f2fs-devel@lists.sourceforge.net; Wed, 22 Jan 2025 21:13:47 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=NoEmlrehsD0ZTjs0tDeVYR7uR34B7qVwtizQGy+0WL8=; b=SQL9tuMeqSvBot99ArpWM9e5sG 82rSmsbwC6ITa9jCImkMrs8ygV6sXaCpr082W5o9FSEw8Zo1kod2qe+ER3gKo4f5WF7LR24swTsux y+OgZVHJ5h3/c4ZEsEz8dAIuCpSkJZIHe5HY9U8dnate7S2h0Kmb1iTSdRlrYVw204zs=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID: Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=NoEmlrehsD0ZTjs0tDeVYR7uR34B7qVwtizQGy+0WL8=; b=hdAYdyb1jklDiiWgs1buGGOHvK iU/4zrwzY5q2OpBtPjIRw8Bk2/rEZG7dYiWooR5oSxJ3/JbRcm3DPLNz3t5I6fE7o85/X1NDbAN/S u4uo27sUF2DdcNvuW3WXgI9x8qDZJsouITGDVlDhgIn7OpOTWdCot6o6YpQ9PO90n1wE=; Received: from nyc.source.kernel.org ([147.75.193.91]) by sfi-mx-2.v28.lw.sourceforge.com with esmtps (TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.95) id 1tai2k-0004zn-MG for linux-f2fs-devel@lists.sourceforge.net; Wed, 22 Jan 2025 21:13:47 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 8D027A41DC0 for ; Wed, 22 Jan 2025 21:11:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9828AC4CED3; Wed, 22 Jan 2025 21:13:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737580415; bh=22nq4pZtyV2CDGIp3PeViZF/j86FmzUbZKeKhn7TyEg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lxA251l1/o6ciH8Wi84JKzy3bAekHYGGm4Pz/pPWTCX/lUg+RwL5teE4gK6fJKGUY smul0VoM2N28XU82T7N1ssEa2ZyK6/3WtrdPVJXpwZms1mP4YeJizo0gxu9PEfp3wS cHXM3puMG52YCzMRzUMSDX/zuu4UC6dYsjs5D+Vr0swCNt3xWL89/l4aDoB2MnWAif 3rm7oDxMK5Q2K7CRp7DKhkBhtaSG6MvgHlCwyjLux7ekVZB2o2LEe2yeYlz31ty9zO 8t0LqEhY5Qn4hyxSPuw8Lpgrvs+KFnIYl7uxOlxW+2GYbuFq5ncyH8VedbQjdg2xjL 48Q2eAK0q4YIQ== To: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Date: Wed, 22 Jan 2025 21:10:17 +0000 Message-ID: <20250122211323.3835557-3-jaegeuk@kernel.org> X-Mailer: git-send-email 2.48.1.262.g85cc9f2d1e-goog In-Reply-To: <20250122211323.3835557-1-jaegeuk@kernel.org> References: <20250122211323.3835557-1-jaegeuk@kernel.org> MIME-Version: 1.0 X-Headers-End: 1tai2k-0004zn-MG Subject: [f2fs-dev] [PATCH 2/2] f2fs: add a sysfs entry to request donate file-backed pages 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: , X-Patchwork-Original-From: Jaegeuk Kim via Linux-f2fs-devel From: Jaegeuk Kim Reply-To: Jaegeuk Kim Cc: Jaegeuk Kim Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net 1. ioctl(fd1, F2FS_IOC_DONATE_RANGE, {0,3}); 2. ioctl(fd2, F2FS_IOC_DONATE_RANGE, {1,2}); 3. ioctl(fd3, F2FS_IOC_DONATE_RANGE, {3,1}); 4. echo 1024 > /sys/fs/f2fs/blk/reclaim_caches_kb will reclaim 4MB page cache ranges, registered by #1, #2, and #3. Signed-off-by: Jaegeuk Kim Reviewed-by: Chao Yu --- Documentation/ABI/testing/sysfs-fs-f2fs | 7 ++++++ fs/f2fs/f2fs.h | 2 ++ fs/f2fs/shrinker.c | 33 +++++++++++++++++++++++++ fs/f2fs/sysfs.c | 8 ++++++ 4 files changed, 50 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 3e1630c70d8a..0455d06a4b27 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -828,3 +828,10 @@ Date: November 2024 Contact: "Chao Yu" Description: It controls max read extent count for per-inode, the value of threshold is 10240 by default. + +What: /sys/fs/f2fs//reclaim_caches_kb +Date: December 2024 +Contact: "Jaegeuk Kim" +Description: It reclaims the given KBs of file-backed pages registered by + ioctl(F2FS_IOC_DONATE_RANGE). + For example, writing N tries to drop N KBs spaces in LRU. diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 9bed1a3a60fb..62b7fed1514a 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1637,6 +1637,7 @@ struct f2fs_sb_info { /* control donate caches */ unsigned int donate_files; + unsigned int reclaim_caches_kb; /* basic filesystem units */ unsigned int log_sectors_per_block; /* log2 sectors per block */ @@ -4259,6 +4260,7 @@ unsigned long f2fs_shrink_count(struct shrinker *shrink, struct shrink_control *sc); unsigned long f2fs_shrink_scan(struct shrinker *shrink, struct shrink_control *sc); +void f2fs_reclaim_caches(struct f2fs_sb_info *sbi); void f2fs_join_shrinker(struct f2fs_sb_info *sbi); void f2fs_leave_shrinker(struct f2fs_sb_info *sbi); diff --git a/fs/f2fs/shrinker.c b/fs/f2fs/shrinker.c index 83d6fb97dcae..759a6e8a49c0 100644 --- a/fs/f2fs/shrinker.c +++ b/fs/f2fs/shrinker.c @@ -130,6 +130,39 @@ unsigned long f2fs_shrink_scan(struct shrinker *shrink, return freed; } +void f2fs_reclaim_caches(struct f2fs_sb_info *sbi) +{ + struct inode *inode; + struct f2fs_inode_info *fi; + unsigned int nfiles = sbi->donate_files; + pgoff_t npages = sbi->reclaim_caches_kb >> (PAGE_SHIFT - 10); + + while (npages && nfiles--) { + pgoff_t len; + + spin_lock(&sbi->inode_lock[DONATE_INODE]); + if (list_empty(&sbi->inode_list[DONATE_INODE])) { + spin_unlock(&sbi->inode_lock[DONATE_INODE]); + break; + } + fi = list_first_entry(&sbi->inode_list[DONATE_INODE], + struct f2fs_inode_info, gdonate_list); + list_move_tail(&fi->gdonate_list, &sbi->inode_list[DONATE_INODE]); + inode = igrab(&fi->vfs_inode); + spin_unlock(&sbi->inode_lock[DONATE_INODE]); + + if (!inode) + continue; + + len = fi->donate_end - fi->donate_start + 1; + npages = npages < len ? 0 : npages - len; + invalidate_inode_pages2_range(inode->i_mapping, + fi->donate_start, fi->donate_end); + iput(inode); + cond_resched(); + } +} + void f2fs_join_shrinker(struct f2fs_sb_info *sbi) { spin_lock(&f2fs_list_lock); diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index d15c68b28952..d11726aaf5ae 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -811,6 +811,12 @@ static ssize_t __sbi_store(struct f2fs_attr *a, return count; } + if (!strcmp(a->attr.name, "reclaim_caches_kb")) { + sbi->reclaim_caches_kb = t; + f2fs_reclaim_caches(sbi); + return count; + } + *ui = (unsigned int)t; return count; @@ -1030,6 +1036,7 @@ F2FS_SBI_GENERAL_RW_ATTR(max_victim_search); F2FS_SBI_GENERAL_RW_ATTR(migration_granularity); F2FS_SBI_GENERAL_RW_ATTR(migration_window_granularity); F2FS_SBI_GENERAL_RW_ATTR(dir_level); +F2FS_SBI_GENERAL_RW_ATTR(reclaim_caches_kb); #ifdef CONFIG_F2FS_IOSTAT F2FS_SBI_GENERAL_RW_ATTR(iostat_enable); F2FS_SBI_GENERAL_RW_ATTR(iostat_period_ms); @@ -1178,6 +1185,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(migration_granularity), ATTR_LIST(migration_window_granularity), ATTR_LIST(dir_level), + ATTR_LIST(reclaim_caches_kb), ATTR_LIST(ram_thresh), ATTR_LIST(ra_nid_pages), ATTR_LIST(dirty_nats_ratio),