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@xxxxxxxxxxxx>
---
fs/ext2/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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);
--
2.17.2
