| Message ID | 20200622012526.4688-1-cgxu519@mykernel.net |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | ext2: delay discarding block reservation | expand |
diff --git a/fs/ext2/file.c b/fs/ext2/file.c index 60378ddf1424..28eaf429138b 100644 --- a/fs/ext2/file.c +++ b/fs/ext2/file.c @@ -139,7 +139,7 @@ static int ext2_file_mmap(struct file *file, struct vm_area_struct *vma) */ static int ext2_release_file (struct inode * inode, struct file * filp) { - if (filp->f_mode & FMODE_WRITE) { + if ((filp->f_mode & FMODE_WRITE) && (atomic_read(&inode->i_writecount) == 1)) { mutex_lock(&EXT2_I(inode)->truncate_mutex); ext2_discard_reservation(inode); mutex_unlock(&EXT2_I(inode)->truncate_mutex);
Currently block reservation will be discard when a write mode file structure is released. It is not efficent for concurrent writing, so change to discard block reservation when last writer release file structure. Signed-off-by: Chengguang Xu <cgxu519@mykernel.net> --- fs/ext2/file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)