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authorChao Yu <yuchao0@huawei.com>2020-02-27 12:30:03 +0100
committerJaegeuk Kim <jaegeuk@kernel.org>2020-03-10 17:18:32 +0100
commitc10c98203222f4baef78a641bbb525a00eeebd2f (patch)
treec38e40b88d49fbf7f233ca44a25cb827c8e44b48 /fs
parentf2fs: fix to check i_compr_blocks correctly (diff)
downloadlinux-c10c98203222f4baef78a641bbb525a00eeebd2f.tar.xz
linux-c10c98203222f4baef78a641bbb525a00eeebd2f.zip
f2fs: cover last_disk_size update with spinlock
This change solves below hangtask issue: INFO: task kworker/u16:1:58 blocked for more than 122 seconds. Not tainted 5.6.0-rc2-00590-g9983bdae4974e #11 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u16:1 D 0 58 2 0x00000000 Workqueue: writeback wb_workfn (flush-179:0) Backtrace: (__schedule) from [<c0913234>] (schedule+0x78/0xf4) (schedule) from [<c017ec74>] (rwsem_down_write_slowpath+0x24c/0x4c0) (rwsem_down_write_slowpath) from [<c0915f2c>] (down_write+0x6c/0x70) (down_write) from [<c0435b80>] (f2fs_write_single_data_page+0x608/0x7ac) (f2fs_write_single_data_page) from [<c0435fd8>] (f2fs_write_cache_pages+0x2b4/0x7c4) (f2fs_write_cache_pages) from [<c043682c>] (f2fs_write_data_pages+0x344/0x35c) (f2fs_write_data_pages) from [<c0267ee8>] (do_writepages+0x3c/0xd4) (do_writepages) from [<c0310cbc>] (__writeback_single_inode+0x44/0x454) (__writeback_single_inode) from [<c03112d0>] (writeback_sb_inodes+0x204/0x4b0) (writeback_sb_inodes) from [<c03115cc>] (__writeback_inodes_wb+0x50/0xe4) (__writeback_inodes_wb) from [<c03118f4>] (wb_writeback+0x294/0x338) (wb_writeback) from [<c0312dac>] (wb_workfn+0x35c/0x54c) (wb_workfn) from [<c014f2b8>] (process_one_work+0x214/0x544) (process_one_work) from [<c014f634>] (worker_thread+0x4c/0x574) (worker_thread) from [<c01564fc>] (kthread+0x144/0x170) (kthread) from [<c01010e8>] (ret_from_fork+0x14/0x2c) Reported-and-tested-by: Ondřej Jirman <megi@xff.cz> Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/f2fs/compress.c4
-rw-r--r--fs/f2fs/data.c4
-rw-r--r--fs/f2fs/f2fs.h5
-rw-r--r--fs/f2fs/file.c4
-rw-r--r--fs/f2fs/super.c1
5 files changed, 10 insertions, 8 deletions
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 6da33ba2b2db..25bc6154c31c 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -898,10 +898,10 @@ unlock_continue:
f2fs_put_dnode(&dn);
f2fs_unlock_op(sbi);
- down_write(&fi->i_sem);
+ spin_lock(&fi->i_size_lock);
if (fi->last_disk_size < psize)
fi->last_disk_size = psize;
- up_write(&fi->i_sem);
+ spin_unlock(&fi->i_size_lock);
f2fs_put_rpages(cc);
f2fs_destroy_compress_ctx(cc);
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index b27b72107911..e5dc1ebb5305 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -2647,10 +2647,10 @@ write:
if (err) {
file_set_keep_isize(inode);
} else {
- down_write(&F2FS_I(inode)->i_sem);
+ spin_lock(&F2FS_I(inode)->i_size_lock);
if (F2FS_I(inode)->last_disk_size < psize)
F2FS_I(inode)->last_disk_size = psize;
- up_write(&F2FS_I(inode)->i_sem);
+ spin_unlock(&F2FS_I(inode)->i_size_lock);
}
done:
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index a5656dd00bc2..43900c1e34fc 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -696,6 +696,7 @@ struct f2fs_inode_info {
struct task_struct *cp_task; /* separate cp/wb IO stats*/
nid_t i_xattr_nid; /* node id that contains xattrs */
loff_t last_disk_size; /* lastly written file size */
+ spinlock_t i_size_lock; /* protect last_disk_size */
#ifdef CONFIG_QUOTA
struct dquot *i_dquot[MAXQUOTAS];
@@ -2855,9 +2856,9 @@ static inline bool f2fs_skip_inode_update(struct inode *inode, int dsync)
if (!f2fs_is_time_consistent(inode))
return false;
- down_read(&F2FS_I(inode)->i_sem);
+ spin_lock(&F2FS_I(inode)->i_size_lock);
ret = F2FS_I(inode)->last_disk_size == i_size_read(inode);
- up_read(&F2FS_I(inode)->i_sem);
+ spin_unlock(&F2FS_I(inode)->i_size_lock);
return ret;
}
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 0d4da644df3b..867bd6e444e7 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -929,10 +929,10 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
if (err)
return err;
- down_write(&F2FS_I(inode)->i_sem);
+ spin_lock(&F2FS_I(inode)->i_size_lock);
inode->i_mtime = inode->i_ctime = current_time(inode);
F2FS_I(inode)->last_disk_size = i_size_read(inode);
- up_write(&F2FS_I(inode)->i_sem);
+ spin_unlock(&F2FS_I(inode)->i_size_lock);
}
__setattr_copy(inode, attr);
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 686f5402660e..ca34c214cc88 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -960,6 +960,7 @@ static struct inode *f2fs_alloc_inode(struct super_block *sb)
/* Initialize f2fs-specific inode info */
atomic_set(&fi->dirty_pages, 0);
init_rwsem(&fi->i_sem);
+ spin_lock_init(&fi->i_size_lock);
INIT_LIST_HEAD(&fi->dirty_list);
INIT_LIST_HEAD(&fi->gdirty_list);
INIT_LIST_HEAD(&fi->inmem_ilist);