If we have enough aggressive DIO readers, truncate will wait
forever inside inode_dio_wait(). It is reasonable to disable
nonlock DIO read optimization during truncate.
Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
---
fs/ext4/inode.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 709ec5a..5a75908 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4354,7 +4354,9 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
if (attr->ia_valid & ATTR_SIZE) {
if (attr->ia_size != i_size_read(inode))
truncate_setsize(inode, attr->ia_size);
+ ext4_set_inode_state(inode, EXT4_STATE_DIOREAD_LOCK);
inode_dio_wait(inode);
+ ext4_clear_inode_state(inode, EXT4_STATE_DIOREAD_LOCK);
ext4_truncate(inode);
}
--
1.7.7.6
--
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