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From: Andiry Xu <jix024@eng.ucsd.edu>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-nvdimm@lists.01.org
Cc: dan.j.williams@intel.com, andy.rudoff@intel.com,
	coughlan@redhat.com, swanson@cs.ucsd.edu, david@fromorbit.com,
	jack@suse.com, swhiteho@redhat.com, miklos@szeredi.hu,
	andiry.xu@gmail.com, Andiry Xu <jix024@cs.ucsd.edu>
Subject: [RFC v2 15/83] Add free list data structure.
Date: Sat, 10 Mar 2018 10:17:56 -0800
Message-ID: <1520705944-6723-16-git-send-email-jix024@eng.ucsd.edu> (raw)
In-Reply-To: <1520705944-6723-1-git-send-email-jix024@eng.ucsd.edu>

From: Andiry Xu <jix024@cs.ucsd.edu>

Free list is the data structure that NOVA uses to manage free pmem blocks.
Each CPU has its own free list to avoid contention.
Free list manages free pmem blocks (represented in range node) with red-black tree.

Signed-off-by: Andiry Xu <jix024@cs.ucsd.edu>
---
 fs/nova/Makefile |  2 +-
 fs/nova/balloc.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++
 fs/nova/balloc.h | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 fs/nova/nova.h   |  1 +
 fs/nova/super.c  | 11 ++++++++++
 fs/nova/super.h  |  4 ++++
 6 files changed, 141 insertions(+), 1 deletion(-)
 create mode 100644 fs/nova/balloc.c
 create mode 100644 fs/nova/balloc.h

diff --git a/fs/nova/Makefile b/fs/nova/Makefile
index 886356a..e2f7b07 100644
--- a/fs/nova/Makefile
+++ b/fs/nova/Makefile
@@ -4,4 +4,4 @@
 
 obj-$(CONFIG_NOVA_FS) += nova.o
 
-nova-y := bbuild.o inode.o rebuild.o stats.o super.o
+nova-y := balloc.o bbuild.o inode.o rebuild.o stats.o super.o
diff --git a/fs/nova/balloc.c b/fs/nova/balloc.c
new file mode 100644
index 0000000..450c942
--- /dev/null
+++ b/fs/nova/balloc.c
@@ -0,0 +1,58 @@
+/*
+ * NOVA persistent memory management
+ *
+ * Copyright 2015-2016 Regents of the University of California,
+ * UCSD Non-Volatile Systems Lab, Andiry Xu <jix024@cs.ucsd.edu>
+ * Copyright 2012-2013 Intel Corporation
+ * Copyright 2009-2011 Marco Stornelli <marco.stornelli@gmail.com>
+ * Copyright 2003 Sony Corporation
+ * Copyright 2003 Matsushita Electric Industrial Co., Ltd.
+ * 2003-2004 (c) MontaVista Software, Inc. , Steve Longerbeam
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/fs.h>
+#include <linux/bitops.h>
+#include "nova.h"
+#include "inode.h"
+
+int nova_alloc_block_free_lists(struct super_block *sb)
+{
+	struct nova_sb_info *sbi = NOVA_SB(sb);
+	struct free_list *free_list;
+	int i;
+
+	sbi->free_lists = kcalloc(sbi->cpus, sizeof(struct free_list),
+				  GFP_KERNEL);
+
+	if (!sbi->free_lists)
+		return -ENOMEM;
+
+	for (i = 0; i < sbi->cpus; i++) {
+		free_list = nova_get_free_list(sb, i);
+		free_list->block_free_tree = RB_ROOT;
+		spin_lock_init(&free_list->s_lock);
+		free_list->index = i;
+	}
+
+	return 0;
+}
+
+void nova_delete_free_lists(struct super_block *sb)
+{
+	struct nova_sb_info *sbi = NOVA_SB(sb);
+
+	/* Each tree is freed in save_blocknode_mappings */
+	kfree(sbi->free_lists);
+	sbi->free_lists = NULL;
+}
+
+
diff --git a/fs/nova/balloc.h b/fs/nova/balloc.h
new file mode 100644
index 0000000..e7c7a1d
--- /dev/null
+++ b/fs/nova/balloc.h
@@ -0,0 +1,66 @@
+#ifndef __BALLOC_H
+#define __BALLOC_H
+
+#include "inode.h"
+
+/* DRAM structure to hold a list of free PMEM blocks */
+struct free_list {
+	spinlock_t s_lock;
+	struct rb_root	block_free_tree;
+	struct nova_range_node *first_node; // lowest address free range
+	struct nova_range_node *last_node; // highest address free range
+
+	int		index; // Which CPU do I belong to?
+
+	/*
+	 * Start and end of allocatable range, inclusive.
+	 */
+	unsigned long	block_start;
+	unsigned long	block_end;
+
+	unsigned long	num_free_blocks;
+
+	/* How many nodes in the rb tree? */
+	unsigned long	num_blocknode;
+
+	u32		csum;		/* Protect integrity */
+
+	/* Statistics */
+	unsigned long	alloc_log_count;
+	unsigned long	alloc_data_count;
+	unsigned long	free_log_count;
+	unsigned long	free_data_count;
+	unsigned long	alloc_log_pages;
+	unsigned long	alloc_data_pages;
+	unsigned long	freed_log_pages;
+	unsigned long	freed_data_pages;
+
+	u64		padding[8];	/* Cache line break */
+};
+
+static inline
+struct free_list *nova_get_free_list(struct super_block *sb, int cpu)
+{
+	struct nova_sb_info *sbi = NOVA_SB(sb);
+
+	return &sbi->free_lists[cpu];
+}
+
+enum nova_alloc_direction {ALLOC_FROM_HEAD = 0,
+			   ALLOC_FROM_TAIL = 1};
+
+enum nova_alloc_init {ALLOC_NO_INIT = 0,
+		      ALLOC_INIT_ZERO = 1};
+
+enum alloc_type {
+	LOG = 1,
+	DATA,
+};
+
+
+
+
+int nova_alloc_block_free_lists(struct super_block *sb);
+void nova_delete_free_lists(struct super_block *sb);
+
+#endif
diff --git a/fs/nova/nova.h b/fs/nova/nova.h
index e0e85fb..c4abdd8 100644
--- a/fs/nova/nova.h
+++ b/fs/nova/nova.h
@@ -310,6 +310,7 @@ struct nova_range_node {
 };
 
 #include "bbuild.h"
+#include "balloc.h"
 
 /* ====================================================== */
 /* ==============  Function prototypes  ================= */
diff --git a/fs/nova/super.c b/fs/nova/super.c
index aec1cd3..43b24a7 100644
--- a/fs/nova/super.c
+++ b/fs/nova/super.c
@@ -545,6 +545,13 @@ static int nova_fill_super(struct super_block *sb, void *data, int silent)
 		goto out;
 	}
 
+	if (nova_alloc_block_free_lists(sb)) {
+		retval = -ENOMEM;
+		nova_err(sb, "%s: Failed to allocate block free lists.",
+			 __func__);
+		goto out;
+	}
+
 	/* Init a new nova instance */
 	if (sbi->s_mount_opt & NOVA_MOUNT_FORMAT) {
 		root_pi = nova_init(sb, sbi->initsize);
@@ -611,6 +618,8 @@ static int nova_fill_super(struct super_block *sb, void *data, int silent)
 	kfree(sbi->zeroed_page);
 	sbi->zeroed_page = NULL;
 
+	nova_delete_free_lists(sb);
+
 	kfree(sbi->nova_sb);
 	kfree(sbi);
 	nova_dbg("%s failed: return %d\n", __func__, retval);
@@ -679,6 +688,8 @@ static void nova_put_super(struct super_block *sb)
 		sbi->virt_addr = NULL;
 	}
 
+	nova_delete_free_lists(sb);
+
 	kfree(sbi->zeroed_page);
 	nova_dbgmask = 0;
 
diff --git a/fs/nova/super.h b/fs/nova/super.h
index b478080..dcafbd8 100644
--- a/fs/nova/super.h
+++ b/fs/nova/super.h
@@ -118,6 +118,10 @@ struct nova_sb_info {
 
 	/* ZEROED page for cache page initialized */
 	void *zeroed_page;
+
+	/* Per-CPU free block list */
+	struct free_list *free_lists;
+	unsigned long per_list_blocks;
 };
 
 static inline struct nova_sb_info *NOVA_SB(struct super_block *sb)
-- 
2.7.4

  parent reply index

Thread overview: 119+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-10 18:17 [RFC v2 00/83] NOVA: a new file system for persistent memory Andiry Xu
2018-03-10 18:17 ` [RFC v2 01/83] Introduction and documentation of NOVA filesystem Andiry Xu
2018-03-19 20:43   ` Randy Dunlap
2018-03-19 23:00     ` Andiry Xu
2018-04-22  8:05   ` Pavel Machek
2018-03-10 18:17 ` [RFC v2 02/83] Add nova_def.h Andiry Xu
2018-03-10 18:17 ` [RFC v2 03/83] Add super.h Andiry Xu
2018-03-15  4:54   ` Darrick J. Wong
2018-03-15  6:11     ` Andiry Xu
2018-03-15  9:05       ` Arnd Bergmann
2018-03-15 17:51         ` Andiry Xu
2018-03-15 20:04           ` Andreas Dilger
2018-03-15 20:38           ` Arnd Bergmann
2018-03-16  2:59             ` Theodore Y. Ts'o
2018-03-16  6:17               ` Andiry Xu
2018-03-16  6:30                 ` Darrick J. Wong
2018-03-16  9:19               ` Arnd Bergmann
2018-03-10 18:17 ` [RFC v2 04/83] NOVA inode definition Andiry Xu
2018-03-15  5:06   ` Darrick J. Wong
2018-03-15  6:16     ` Andiry Xu
2018-03-10 18:17 ` [RFC v2 05/83] Add NOVA filesystem definitions and useful helper routines Andiry Xu
2018-03-11 12:00   ` Nikolay Borisov
2018-03-11 19:22     ` Eric Biggers
2018-03-11 21:45       ` Andiry Xu
2018-03-19 19:39       ` Andiry Xu
2018-03-19 20:30         ` Eric Biggers
2018-03-19 21:59           ` Andiry Xu
2018-03-10 18:17 ` [RFC v2 06/83] Add inode get/read methods Andiry Xu
2018-04-23  6:12   ` Darrick J. Wong
2018-04-23 15:55     ` Andiry Xu
2018-03-10 18:17 ` [RFC v2 07/83] Initialize inode_info and rebuild inode information in nova_iget() Andiry Xu
2018-03-10 18:17 ` [RFC v2 08/83] NOVA superblock operations Andiry Xu
2018-03-10 18:17 ` [RFC v2 09/83] Add Kconfig and Makefile Andiry Xu
2018-03-11 12:15   ` Nikolay Borisov
2018-03-11 21:32     ` Andiry Xu
2018-03-10 18:17 ` [RFC v2 10/83] Add superblock integrity check Andiry Xu
2018-03-10 18:17 ` [RFC v2 11/83] Add timing and I/O statistics for performance analysis and profiling Andiry Xu
2018-03-10 18:17 ` [RFC v2 12/83] Add timing for mount and init Andiry Xu
2018-03-10 18:17 ` [RFC v2 13/83] Add remount_fs and show_options methods Andiry Xu
2018-03-10 18:17 ` [RFC v2 14/83] Add range node kmem cache Andiry Xu
2018-03-11 11:55   ` Nikolay Borisov
2018-03-11 21:31     ` Andiry Xu
2018-03-10 18:17 ` Andiry Xu [this message]
2018-03-10 18:17 ` [RFC v2 16/83] Initialize block map and free lists in nova_init() Andiry Xu
2018-03-11 12:12   ` Nikolay Borisov
2018-03-11 21:30     ` Andiry Xu
2018-03-10 18:17 ` [RFC v2 17/83] Add statfs support Andiry Xu
2018-03-10 18:17 ` [RFC v2 18/83] Add freelist statistics printing Andiry Xu
2018-03-10 18:18 ` [RFC v2 19/83] Add pmem block free routines Andiry Xu
2018-03-10 18:18 ` [RFC v2 20/83] Pmem block allocation routines Andiry Xu
2018-03-10 18:18 ` [RFC v2 21/83] Add log structure Andiry Xu
2018-03-10 18:18 ` [RFC v2 22/83] Inode log pages allocation and reclaimation Andiry Xu
2018-03-10 18:18 ` [RFC v2 23/83] Save allocator to pmem in put_super Andiry Xu
2018-03-10 18:18 ` [RFC v2 24/83] Initialize and allocate inode table Andiry Xu
2018-03-10 18:18 ` [RFC v2 25/83] Support get normal inode address and inode table extentsion Andiry Xu
2018-03-10 18:18 ` [RFC v2 26/83] Add inode_map to track inuse inodes Andiry Xu
2018-03-10 18:18 ` [RFC v2 27/83] Save the inode inuse list to pmem upon umount Andiry Xu
2018-03-10 18:18 ` [RFC v2 28/83] Add NOVA address space operations Andiry Xu
2018-03-10 18:18 ` [RFC v2 29/83] Add write_inode and dirty_inode routines Andiry Xu
2018-03-10 18:18 ` [RFC v2 30/83] New NOVA inode allocation Andiry Xu
2018-03-10 18:18 ` [RFC v2 31/83] Add new vfs " Andiry Xu
2018-03-10 18:18 ` [RFC v2 32/83] Add log entry definitions Andiry Xu
2018-03-10 18:18 ` [RFC v2 33/83] Inode log and entry printing for debug purpose Andiry Xu
2018-03-10 18:18 ` [RFC v2 34/83] Journal: NOVA light weight journal definitions Andiry Xu
2018-03-10 18:18 ` [RFC v2 35/83] Journal: Lite journal helper routines Andiry Xu
2018-03-10 18:18 ` [RFC v2 36/83] Journal: Lite journal recovery Andiry Xu
2018-03-10 18:18 ` [RFC v2 37/83] Journal: Lite journal create and commit Andiry Xu
2018-03-10 18:18 ` [RFC v2 38/83] Journal: NOVA lite journal initialization Andiry Xu
2018-03-10 18:18 ` [RFC v2 39/83] Log operation: dentry append Andiry Xu
2018-03-10 18:18 ` [RFC v2 40/83] Log operation: file write entry append Andiry Xu
2018-03-10 18:18 ` [RFC v2 41/83] Log operation: setattr " Andiry Xu
2018-03-10 18:18 ` [RFC v2 42/83] Log operation: link change append Andiry Xu
2018-03-10 18:18 ` [RFC v2 43/83] Log operation: in-place update log entry Andiry Xu
2018-03-10 18:18 ` [RFC v2 44/83] Log operation: invalidate log entries Andiry Xu
2018-03-10 18:18 ` [RFC v2 45/83] Log operation: file inode log lookup and assign Andiry Xu
2018-03-10 18:18 ` [RFC v2 46/83] Dir: Add Directory radix tree insert/remove methods Andiry Xu
2018-03-10 18:18 ` [RFC v2 47/83] Dir: Add initial dentries when initializing a directory inode log Andiry Xu
2018-03-10 18:18 ` [RFC v2 48/83] Dir: Readdir operation Andiry Xu
2018-03-10 18:18 ` [RFC v2 49/83] Dir: Append create/remove dentry Andiry Xu
2018-03-10 18:18 ` [RFC v2 50/83] Inode: Add nova_evict_inode Andiry Xu
2018-03-10 18:18 ` [RFC v2 51/83] Rebuild: directory inode Andiry Xu
2018-03-10 18:18 ` [RFC v2 52/83] Rebuild: file inode Andiry Xu
2018-03-10 18:18 ` [RFC v2 53/83] Namei: lookup Andiry Xu
2018-03-10 18:18 ` [RFC v2 54/83] Namei: create and mknod Andiry Xu
2018-03-10 18:18 ` [RFC v2 55/83] Namei: mkdir Andiry Xu
2018-03-10 18:18 ` [RFC v2 56/83] Namei: link and unlink Andiry Xu
2018-03-10 18:18 ` [RFC v2 57/83] Namei: rmdir Andiry Xu
2018-03-10 18:18 ` [RFC v2 58/83] Namei: rename Andiry Xu
2018-03-10 18:18 ` [RFC v2 59/83] Namei: setattr Andiry Xu
2018-03-10 18:18 ` [RFC v2 60/83] Add special inode operations Andiry Xu
2018-03-10 18:18 ` [RFC v2 61/83] Super: Add nova_export_ops Andiry Xu
2018-03-10 18:18 ` [RFC v2 62/83] File: getattr and file inode operations Andiry Xu
2018-03-10 18:18 ` [RFC v2 63/83] File operation: llseek Andiry Xu
2018-03-10 18:18 ` [RFC v2 64/83] File operation: open, fsync, flush Andiry Xu
2018-03-10 18:18 ` [RFC v2 65/83] File operation: read Andiry Xu
2018-03-10 18:18 ` [RFC v2 66/83] Super: Add file write item cache Andiry Xu
2018-03-10 18:18 ` [RFC v2 67/83] Dax: commit list of file write items to log Andiry Xu
2018-03-10 18:18 ` [RFC v2 68/83] File operation: copy-on-write write Andiry Xu
2018-03-10 18:18 ` [RFC v2 69/83] Super: Add module param inplace_data_updates Andiry Xu
2018-03-10 18:18 ` [RFC v2 70/83] File operation: Inplace write Andiry Xu
2018-03-10 18:18 ` [RFC v2 71/83] Symlink support Andiry Xu
2018-03-10 18:18 ` [RFC v2 72/83] File operation: fallocate Andiry Xu
2018-03-10 18:18 ` [RFC v2 73/83] Dax: Add iomap operations Andiry Xu
2018-03-10 18:18 ` [RFC v2 74/83] File operation: Mmap Andiry Xu
2018-03-10 18:18 ` [RFC v2 75/83] File operation: read/write iter Andiry Xu
2018-03-10 18:18 ` [RFC v2 76/83] Ioctl support Andiry Xu
2018-03-10 18:18 ` [RFC v2 77/83] GC: Fast garbage collection Andiry Xu
2018-03-10 18:18 ` [RFC v2 78/83] GC: Thorough " Andiry Xu
2018-03-10 18:19 ` [RFC v2 79/83] Normal recovery Andiry Xu
2018-03-10 18:19 ` [RFC v2 80/83] Failure recovery: bitmap operations Andiry Xu
2018-03-10 18:19 ` [RFC v2 81/83] Failure recovery: Inode pages recovery routines Andiry Xu
2018-03-10 18:19 ` [RFC v2 82/83] Failure recovery: Per-CPU recovery Andiry Xu
2018-03-10 18:19 ` [RFC v2 83/83] Sysfs support Andiry Xu
2018-03-15  0:33   ` Randy Dunlap
2018-03-15  6:07     ` Andiry Xu
2018-03-22 15:00   ` David Sterba
2018-03-23  0:31     ` Andiry Xu
2018-03-11  2:14 ` [RFC v2 00/83] NOVA: a new file system for persistent memory Theodore Y. Ts'o
2018-03-11  4:58   ` Andiry Xu

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