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Message-Id: <20210114220521.3578185-1-jaegeuk@kernel.org>
Date: Thu, 14 Jan 2021 14:05:21 -0800
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: linux-kernel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com
Cc: Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH] f2fs: deprecate f2fs_trace_io
This patch deprecates f2fs_trace_io, since f2fs uses page->private more broadly,
resulting in more buggy cases.
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
fs/f2fs/Kconfig | 10 ---
fs/f2fs/Makefile | 1 -
fs/f2fs/checkpoint.c | 3 -
fs/f2fs/data.c | 4 --
fs/f2fs/file.c | 2 -
fs/f2fs/node.c | 2 -
fs/f2fs/segment.c | 3 -
fs/f2fs/super.c | 6 --
fs/f2fs/trace.c | 165 -------------------------------------------
fs/f2fs/trace.h | 43 -----------
10 files changed, 239 deletions(-)
delete mode 100644 fs/f2fs/trace.c
delete mode 100644 fs/f2fs/trace.h
diff --git a/fs/f2fs/Kconfig b/fs/f2fs/Kconfig
index 63c1fc1a0e3b..62e638a49bbf 100644
--- a/fs/f2fs/Kconfig
+++ b/fs/f2fs/Kconfig
@@ -76,16 +76,6 @@ config F2FS_CHECK_FS
If you want to improve the performance, say N.
-config F2FS_IO_TRACE
- bool "F2FS IO tracer"
- depends on F2FS_FS
- depends on FUNCTION_TRACER
- help
- F2FS IO trace is based on a function trace, which gathers process
- information and block IO patterns in the filesystem level.
-
- If unsure, say N.
-
config F2FS_FAULT_INJECTION
bool "F2FS fault injection facility"
depends on F2FS_FS
diff --git a/fs/f2fs/Makefile b/fs/f2fs/Makefile
index ee7316b42f69..e5295746208b 100644
--- a/fs/f2fs/Makefile
+++ b/fs/f2fs/Makefile
@@ -7,6 +7,5 @@ f2fs-y += shrinker.o extent_cache.o sysfs.o
f2fs-$(CONFIG_F2FS_STAT_FS) += debug.o
f2fs-$(CONFIG_F2FS_FS_XATTR) += xattr.o
f2fs-$(CONFIG_F2FS_FS_POSIX_ACL) += acl.o
-f2fs-$(CONFIG_F2FS_IO_TRACE) += trace.o
f2fs-$(CONFIG_FS_VERITY) += verity.o
f2fs-$(CONFIG_F2FS_FS_COMPRESSION) += compress.o
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 897edb7c951a..8c79ba0566b1 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -17,7 +17,6 @@
#include "f2fs.h"
#include "node.h"
#include "segment.h"
-#include "trace.h"
#include <trace/events/f2fs.h>
static struct kmem_cache *ino_entry_slab;
@@ -443,7 +442,6 @@ static int f2fs_set_meta_page_dirty(struct page *page)
__set_page_dirty_nobuffers(page);
inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
f2fs_set_page_private(page, 0);
- f2fs_trace_pid(page);
return 1;
}
return 0;
@@ -1017,7 +1015,6 @@ void f2fs_update_dirty_page(struct inode *inode, struct page *page)
spin_unlock(&sbi->inode_lock[type]);
f2fs_set_page_private(page, 0);
- f2fs_trace_pid(page);
}
void f2fs_remove_dirty_inode(struct inode *inode)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index d9a063d8a63d..38476d0d3916 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -25,7 +25,6 @@
#include "f2fs.h"
#include "node.h"
#include "segment.h"
-#include "trace.h"
#include <trace/events/f2fs.h>
#define NUM_PREALLOC_POST_READ_CTXS 128
@@ -679,7 +678,6 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
return -EFSCORRUPTED;
trace_f2fs_submit_page_bio(page, fio);
- f2fs_trace_ios(fio, 0);
/* Allocate a new bio */
bio = __bio_alloc(fio, 1);
@@ -884,7 +882,6 @@ int f2fs_merge_page_bio(struct f2fs_io_info *fio)
return -EFSCORRUPTED;
trace_f2fs_submit_page_bio(page, fio);
- f2fs_trace_ios(fio, 0);
if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block,
fio->new_blkaddr))
@@ -981,7 +978,6 @@ void f2fs_submit_page_write(struct f2fs_io_info *fio)
wbc_account_cgroup_owner(fio->io_wbc, bio_page, PAGE_SIZE);
io->last_block_in_bio = fio->new_blkaddr;
- f2fs_trace_ios(fio, 0);
trace_f2fs_submit_page_write(fio->page, fio);
skip:
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index e768371c6575..7db27c81d034 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -29,7 +29,6 @@
#include "xattr.h"
#include "acl.h"
#include "gc.h"
-#include "trace.h"
#include <trace/events/f2fs.h>
#include <uapi/linux/f2fs.h>
@@ -369,7 +368,6 @@ static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
f2fs_update_time(sbi, REQ_TIME);
out:
trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
- f2fs_trace_ios(NULL, 1);
return ret;
}
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 5e3fabacefb5..a8a0fb890e8d 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -17,7 +17,6 @@
#include "node.h"
#include "segment.h"
#include "xattr.h"
-#include "trace.h"
#include <trace/events/f2fs.h>
#define on_f2fs_build_free_nids(nmi) mutex_is_locked(&(nm_i)->build_lock)
@@ -2089,7 +2088,6 @@ static int f2fs_set_node_page_dirty(struct page *page)
__set_page_dirty_nobuffers(page);
inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_NODES);
f2fs_set_page_private(page, 0);
- f2fs_trace_pid(page);
return 1;
}
return 0;
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index deca74cb17df..7d34f1cacdee 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -20,7 +20,6 @@
#include "segment.h"
#include "node.h"
#include "gc.h"
-#include "trace.h"
#include <trace/events/f2fs.h>
#define __reverse_ffz(x) __reverse_ffs(~(x))
@@ -187,8 +186,6 @@ void f2fs_register_inmem_page(struct inode *inode, struct page *page)
{
struct inmem_pages *new;
- f2fs_trace_pid(page);
-
f2fs_set_page_private(page, ATOMIC_WRITTEN_PAGE);
new = f2fs_kmem_cache_alloc(inmem_entry_slab, GFP_NOFS);
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index eaaa8d0f3903..1d1e356d1165 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -33,7 +33,6 @@
#include "segment.h"
#include "xattr.h"
#include "gc.h"
-#include "trace.h"
#define CREATE_TRACE_POINTS
#include <trace/events/f2fs.h>
@@ -1430,8 +1429,6 @@ int f2fs_sync_fs(struct super_block *sb, int sync)
err = f2fs_write_checkpoint(sbi, &cpc);
up_write(&sbi->gc_lock);
}
- f2fs_trace_ios(NULL, 1);
-
return err;
}
@@ -4109,8 +4106,6 @@ static int __init init_f2fs_fs(void)
return -EINVAL;
}
- f2fs_build_trace_ios();
-
err = init_inodecache();
if (err)
goto fail;
@@ -4203,7 +4198,6 @@ static void __exit exit_f2fs_fs(void)
f2fs_destroy_segment_manager_caches();
f2fs_destroy_node_manager_caches();
destroy_inodecache();
- f2fs_destroy_trace_ios();
}
module_init(init_f2fs_fs)
diff --git a/fs/f2fs/trace.c b/fs/f2fs/trace.c
deleted file mode 100644
index d0ab533a9ce8..000000000000
--- a/fs/f2fs/trace.c
+++ /dev/null
@@ -1,165 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * f2fs IO tracer
- *
- * Copyright (c) 2014 Motorola Mobility
- * Copyright (c) 2014 Jaegeuk Kim <jaegeuk@...nel.org>
- */
-#include <linux/fs.h>
-#include <linux/f2fs_fs.h>
-#include <linux/sched.h>
-#include <linux/radix-tree.h>
-
-#include "f2fs.h"
-#include "trace.h"
-
-static RADIX_TREE(pids, GFP_ATOMIC);
-static spinlock_t pids_lock;
-static struct last_io_info last_io;
-
-static inline void __print_last_io(void)
-{
- if (!last_io.len)
- return;
-
- trace_printk("%3x:%3x %4x %-16s %2x %5x %5x %12x %4x\n",
- last_io.major, last_io.minor,
- last_io.pid, "----------------",
- last_io.type,
- last_io.fio.op, last_io.fio.op_flags,
- last_io.fio.new_blkaddr,
- last_io.len);
- memset(&last_io, 0, sizeof(last_io));
-}
-
-static int __file_type(struct inode *inode, pid_t pid)
-{
- if (f2fs_is_atomic_file(inode))
- return __ATOMIC_FILE;
- else if (f2fs_is_volatile_file(inode))
- return __VOLATILE_FILE;
- else if (S_ISDIR(inode->i_mode))
- return __DIR_FILE;
- else if (inode->i_ino == F2FS_NODE_INO(F2FS_I_SB(inode)))
- return __NODE_FILE;
- else if (inode->i_ino == F2FS_META_INO(F2FS_I_SB(inode)))
- return __META_FILE;
- else if (pid)
- return __NORMAL_FILE;
- else
- return __MISC_FILE;
-}
-
-void f2fs_trace_pid(struct page *page)
-{
- struct inode *inode = page->mapping->host;
- pid_t pid = task_pid_nr(current);
- void *p;
-
- set_page_private(page, (unsigned long)pid);
-
-retry:
- if (radix_tree_preload(GFP_NOFS))
- return;
-
- spin_lock(&pids_lock);
- p = radix_tree_lookup(&pids, pid);
- if (p == current)
- goto out;
- if (p)
- radix_tree_delete(&pids, pid);
-
- if (radix_tree_insert(&pids, pid, current)) {
- spin_unlock(&pids_lock);
- radix_tree_preload_end();
- cond_resched();
- goto retry;
- }
-
- trace_printk("%3x:%3x %4x %-16s\n",
- MAJOR(inode->i_sb->s_dev), MINOR(inode->i_sb->s_dev),
- pid, current->comm);
-out:
- spin_unlock(&pids_lock);
- radix_tree_preload_end();
-}
-
-void f2fs_trace_ios(struct f2fs_io_info *fio, int flush)
-{
- struct inode *inode;
- pid_t pid;
- int major, minor;
-
- if (flush) {
- __print_last_io();
- return;
- }
-
- inode = fio->page->mapping->host;
- pid = page_private(fio->page);
-
- major = MAJOR(inode->i_sb->s_dev);
- minor = MINOR(inode->i_sb->s_dev);
-
- if (last_io.major == major && last_io.minor == minor &&
- last_io.pid == pid &&
- last_io.type == __file_type(inode, pid) &&
- last_io.fio.op == fio->op &&
- last_io.fio.op_flags == fio->op_flags &&
- last_io.fio.new_blkaddr + last_io.len ==
- fio->new_blkaddr) {
- last_io.len++;
- return;
- }
-
- __print_last_io();
-
- last_io.major = major;
- last_io.minor = minor;
- last_io.pid = pid;
- last_io.type = __file_type(inode, pid);
- last_io.fio = *fio;
- last_io.len = 1;
- return;
-}
-
-void f2fs_build_trace_ios(void)
-{
- spin_lock_init(&pids_lock);
-}
-
-#define PIDVEC_SIZE 128
-static unsigned int gang_lookup_pids(pid_t *results, unsigned long first_index,
- unsigned int max_items)
-{
- struct radix_tree_iter iter;
- void **slot;
- unsigned int ret = 0;
-
- if (unlikely(!max_items))
- return 0;
-
- radix_tree_for_each_slot(slot, &pids, &iter, first_index) {
- results[ret] = iter.index;
- if (++ret == max_items)
- break;
- }
- return ret;
-}
-
-void f2fs_destroy_trace_ios(void)
-{
- pid_t pid[PIDVEC_SIZE];
- pid_t next_pid = 0;
- unsigned int found;
-
- spin_lock(&pids_lock);
- while ((found = gang_lookup_pids(pid, next_pid, PIDVEC_SIZE))) {
- unsigned idx;
-
- next_pid = pid[found - 1] + 1;
- for (idx = 0; idx < found; idx++)
- radix_tree_delete(&pids, pid[idx]);
- }
- spin_unlock(&pids_lock);
-}
diff --git a/fs/f2fs/trace.h b/fs/f2fs/trace.h
deleted file mode 100644
index 789f6aa727fc..000000000000
--- a/fs/f2fs/trace.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * f2fs IO tracer
- *
- * Copyright (c) 2014 Motorola Mobility
- * Copyright (c) 2014 Jaegeuk Kim <jaegeuk@...nel.org>
- */
-#ifndef __F2FS_TRACE_H__
-#define __F2FS_TRACE_H__
-
-#ifdef CONFIG_F2FS_IO_TRACE
-#include <trace/events/f2fs.h>
-
-enum file_type {
- __NORMAL_FILE,
- __DIR_FILE,
- __NODE_FILE,
- __META_FILE,
- __ATOMIC_FILE,
- __VOLATILE_FILE,
- __MISC_FILE,
-};
-
-struct last_io_info {
- int major, minor;
- pid_t pid;
- enum file_type type;
- struct f2fs_io_info fio;
- block_t len;
-};
-
-extern void f2fs_trace_pid(struct page *);
-extern void f2fs_trace_ios(struct f2fs_io_info *, int);
-extern void f2fs_build_trace_ios(void);
-extern void f2fs_destroy_trace_ios(void);
-#else
-#define f2fs_trace_pid(p)
-#define f2fs_trace_ios(i, n)
-#define f2fs_build_trace_ios()
-#define f2fs_destroy_trace_ios()
-
-#endif
-#endif /* __F2FS_TRACE_H__ */
--
2.30.0.284.gd98b1dd5eaa7-goog
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