If we fallocate past i_size with KEEP_SIZE, extend the file to use some but not
all of this space, and then truncate(i_size) we won't trim the excess
preallocated space. We decided at LSF that we want to truncate the fallocated
bit past i_size when we truncate to i_size, which is what this patch does.
Thanks,
Signed-off-by: Josef Bacik <jbacik@xxxxxx>
---
mm/shmem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/shmem.c b/mm/shmem.c
index de98137..089afde 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -569,7 +569,7 @@ static int shmem_setattr(struct dentry *dentry, struct iattr *attr)
i_size_write(inode, newsize);
inode->i_ctime = inode->i_mtime = CURRENT_TIME;
}
- if (newsize < oldsize) {
+ if (newsize <= oldsize) {
loff_t holebegin = round_up(newsize, PAGE_SIZE);
unmap_mapping_range(inode->i_mapping, holebegin, 0, 1);
shmem_truncate_range(inode, newsize, (loff_t)-1);
--
1.8.3.1
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