AcoSail/kernel_optimize_test
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66af62ce75
kernel_optimize_test/fs
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majianpeng 66af62ce75 f2fs: add global mutex_lock to protect f2fs_stat_list 
There is an race condition between umounting f2fs and reading f2fs/status, which
results in oops.

Fox example:
Thread A			Thread B
umount f2fs 			cat f2fs/status

f2fs_destroy_stats() {		stat_show() {
				 list_for_each_entry_safe(&f2fs_stat_list)
 list_del(&si->stat_list);
 mutex_lock(&si->stat_lock);
 si->sbi = NULL;
 mutex_unlock(&si->stat_lock);
 kfree(sbi->stat_info);
} 				 mutex_lock(&si->stat_lock) <- si is gone.
				 ...
				}

Solution with a global lock: f2fs_stat_mutex:
Thread A			Thread B
umount f2fs 			cat f2fs/status

f2fs_destroy_stats() {		stat_show() {
 mutex_lock(&f2fs_stat_mutex);
 list_del(&si->stat_list);
 mutex_unlock(&f2fs_stat_mutex);
 kfree(sbi->stat_info);		 mutex_lock(&f2fs_stat_mutex);
}				 list_for_each_entry_safe(&f2fs_stat_list)
				 ...
				 mutex_unlock(&f2fs_stat_mutex);
				}

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
[jaegeuk.kim@samsung.com: fix typos, description, and remove the existing lock]
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-01-15 20:18:29 +09:00
..
9p
adfs adfs: drop vmtruncate 2012-12-20 14:00:01 -05:00
affs affs: drop vmtruncate 2012-12-20 14:00:01 -05:00
afs
autofs4 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2012-12-17 15:44:47 -08:00
befs
bfs bfs: drop vmtruncate 2012-12-20 14:00:01 -05:00
btrfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-12-20 18:14:31 -08:00
cachefiles FS-Cache: Mark cancellation of in-progress operation 2012-12-20 22:34:00 +00:00
ceph Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2012-12-20 14:00:13 -08:00
cifs cifs: eliminate cifsERROR variable 2012-12-20 11:27:17 -06:00
coda
configfs lseek: the "whence" argument is called "whence" 2012-12-17 17:15:12 -08:00
cramfs
debugfs
devpts
dlm dlm: fix lvb invalidation conditions 2012-11-16 11:20:42 -06:00
ecryptfs fs/ecryptfs/crypto.c: make ecryptfs_encode_for_filename() static 2012-12-18 10:10:13 -06:00
efs
exofs exofs: don't leak io_state and pages on read error 2012-12-14 12:17:32 +02:00
exportfs Merge branch 'for-3.8' of git://linux-nfs.org/~bfields/linux 2012-12-20 14:04:11 -08:00
ext2
ext3 lseek: the "whence" argument is called "whence" 2012-12-17 17:15:12 -08:00
ext4 Various bug fixes for ext4. Perhaps the most serious bug fixed is one 2013-01-02 09:57:34 -08:00
f2fs f2fs: add global mutex_lock to protect f2fs_stat_list 2013-01-15 20:18:29 +09:00
fat fat: fix incorrect function comment 2012-12-20 17:40:20 -08:00
freevxfs
fscache FS-Cache: Clear remaining page count on retrieval cancellation 2012-12-20 22:35:15 +00:00
fuse Merge branch 'akpm' (Andrew's patch-bomb) 2012-12-17 20:58:12 -08:00
gfs2 GFS2: Reset rd_last_alloc when it reaches the end of the rgrp 2013-01-02 10:05:27 +00:00
hfs hfs: drop vmtruncate 2012-12-20 14:00:01 -05:00
hfsplus Merge branch 'akpm' (Andrew's patch-bomb) 2012-12-20 20:00:43 -08:00
hostfs
hpfs hpfs: drop vmtruncate 2012-12-20 18:40:00 -05:00
hppfs pidns: Use task_active_pid_ns where appropriate 2012-11-19 05:59:09 -08:00
hugetlbfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
isofs
jbd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
jbd2 Various bug fixes for ext4. Perhaps the most serious bug fixed is one 2013-01-02 09:57:34 -08:00
jffs2 jffs2: hold erase_completion_lock on exit 2012-11-18 11:59:01 +02:00
jfs jfs: drop vmtruncate 2012-12-20 18:40:52 -05:00
lockd
logfs logfs: drop vmtruncate 2012-12-20 18:40:53 -05:00
minix minix: drop vmtruncate 2012-12-20 18:40:53 -05:00
ncpfs ncpfs: drop vmtruncate 2012-12-20 18:40:54 -05:00
nfs NFS: Kill fscache warnings when mounting without -ofsc 2012-12-21 08:32:09 -08:00
nfs_common
nfsd Revert "nfsd: warn on odd reply state in nfsd_vfs_read" 2012-12-21 17:07:45 -08:00
nilfs2 nilfs2: drop vmtruncate 2012-12-20 18:40:54 -05:00
nls
notify Merge branch 'for-next' of git://git.infradead.org/users/eparis/notify 2012-12-20 20:11:52 -08:00
ntfs ntfs: drop vmtruncate 2012-12-20 18:40:55 -05:00
ocfs2 ocfs2: drop vmtruncate 2012-12-20 14:00:01 -05:00
omfs omfs: drop vmtruncate 2012-12-20 14:00:01 -05:00
openpromfs
proc mempolicy: remove arg from mpol_parse_str, mpol_to_str 2013-01-02 09:27:10 -08:00
pstore lseek: the "whence" argument is called "whence" 2012-12-17 17:15:12 -08:00
qnx4
qnx6
quota quota: Use the pre-processor to compile out quotactl_cmd_write when !CONFIG_BLOCK 2012-12-13 16:33:24 +01:00
ramfs
reiserfs reiserfs: drop vmtruncate 2012-12-20 14:00:01 -05:00
romfs
squashfs
sysfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2012-12-17 15:44:47 -08:00
sysv sysv: drop vmtruncate 2012-12-20 14:00:01 -05:00
ubifs ubifs: use prandom_bytes 2012-12-17 17:15:26 -08:00
udf udf: remove un-needed variable from inode_getblk 2012-12-13 16:33:23 +01:00
ufs ufs: drop vmtruncate 2012-12-20 14:00:01 -05:00
xfs xfs: fix sparse reported log CRC endian issue 2012-12-03 12:10:59 -06:00
aio.c
anon_inodes.c
attr.c userns: Allow chown and setgid preservation 2012-11-20 04:17:24 -08:00
bad_inode.c lseek: the "whence" argument is called "whence" 2012-12-17 17:15:12 -08:00
binfmt_aout.c get rid of pt_regs argument of ->load_binary() 2012-11-28 21:53:38 -05:00
binfmt_elf_fdpic.c get rid of pt_regs argument of ->load_binary() 2012-11-28 21:53:38 -05:00
binfmt_elf.c binfmt_elf: fix corner case kfree of uninitialized data 2012-12-17 17:15:19 -08:00
binfmt_em86.c exec: use -ELOOP for max recursion depth 2012-12-17 17:15:23 -08:00
binfmt_flat.c get rid of pt_regs argument of ->load_binary() 2012-11-28 21:53:38 -05:00
binfmt_misc.c exec: do not leave bprm->interp on stack 2012-12-20 17:40:19 -08:00
binfmt_script.c exec: do not leave bprm->interp on stack 2012-12-20 17:40:19 -08:00
binfmt_som.c get rid of pt_regs argument of ->load_binary() 2012-11-28 21:53:38 -05:00
bio-integrity.c
bio.c
block_dev.c lseek: the "whence" argument is called "whence" 2012-12-17 17:15:12 -08:00
buffer.c fs/buffer.c: remove redundant initialization in alloc_page_buffers() 2012-12-12 17:38:35 -08:00
char_dev.c
compat_binfmt_elf.c
compat_ioctl.c
compat.c
coredump.c do_coredump(): get rid of pt_regs argument 2012-11-29 00:01:25 -05:00
coredump.h
dcache.c vfs: d_obtain_alias() needs to use "/" as default name. 2012-12-20 18:49:10 -05:00
dcookies.c
direct-io.c direct-io: don't read inode->i_blkbits multiple times 2012-11-29 12:38:44 -08:00
drop_caches.c
eventfd.c fs, eventfd: add procfs fdinfo helper 2012-12-17 17:15:27 -08:00
eventpoll.c epoll: prevent missed events on EPOLL_CTL_MOD 2013-01-02 09:16:43 -08:00
exec.c Merge branch 'akpm' (Andrew's patch-bomb) 2012-12-20 20:00:43 -08:00
fcntl.c
fhandle.c Merge branch 'for-3.8' of git://linux-nfs.org/~bfields/linux 2012-12-20 14:04:11 -08:00
fifo.c
file_table.c fs: Fix imbalance in freeze protection in mark_files_ro() 2012-12-20 13:57:36 -05:00
file.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2012-12-12 12:22:13 -08:00
filesystems.c
fs_struct.c kill daemonize() 2012-11-28 21:49:02 -05:00
fs-writeback.c writeback: fix a typo in comment 2012-12-12 17:38:34 -08:00
generic_acl.c
inode.c mm: redefine address_space.assoc_mapping 2012-12-11 17:22:26 -08:00
internal.h writeback: put unused inodes to LRU after writeback completion 2012-11-26 17:41:24 -08:00
ioctl.c
ioprio.c
Kconfig Introduce a new file system, Flash-Friendly File System (F2FS), to Linux 3.8. 2012-12-20 13:54:52 -08:00
Kconfig.binfmt
libfs.c vfs: drop vmtruncate 2012-12-20 18:46:29 -05:00
locks.c
Makefile f2fs: update Kconfig and Makefile 2012-12-11 13:43:42 +09:00
mbcache.c
mount.h proc: Usable inode numbers for the namespace file descriptors. 2012-11-20 04:19:49 -08:00
mpage.c
namei.c vfs: fix renameat to retry on ESTALE errors 2012-12-20 18:50:05 -05:00
namespace.c vfs, freeze: use ACCESS_ONCE() to guard access to ->mnt_flags 2012-12-20 13:36:18 -05:00
no-block.c
open.c vfs: make fchownat retry once on ESTALE errors 2012-12-20 18:50:07 -05:00
pipe.c
pnode.c
pnode.h vfs: Only support slave subtrees across different user namespaces 2012-11-19 05:59:20 -08:00
posix_acl.c
proc_namespace.c
read_write.c sendfile: allows bypassing of notifier events 2012-12-20 17:40:21 -08:00
read_write.h
readdir.c
select.c
seq_file.c lseek: the "whence" argument is called "whence" 2012-12-17 17:15:12 -08:00
signalfd.c fs, epoll: add procfs fdinfo helper 2012-12-17 17:15:27 -08:00
splice.c writeback: remove nr_pages_dirtied arg from balance_dirty_pages_ratelimited_nr() 2012-12-11 17:22:21 -08:00
stack.c
stat.c vfs: fix readlinkat to retry on ESTALE 2012-12-20 18:50:01 -05:00
statfs.c vfs: fix user_statfs to retry once on ESTALE errors 2012-12-20 18:50:07 -05:00
super.c
sync.c
timerfd.c
utimes.c vfs: allow utimensat() calls to retry once on an ESTALE error 2012-12-20 18:50:08 -05:00
xattr_acl.c
xattr.c vfs: make lremovexattr retry once on ESTALE error 2012-12-20 18:50:11 -05:00