Re: [PATCH] ocfs2: fix the oops problem when write cloned file

[Joseph Qi]

On 20/2/3 10:17, Gang He wrote:
> Hello Joseph, Changwei, Sunny and all,
> 
> Could you help to review this patch? 
> This patch will fix the oops problem caused by write ocfs2 clone files.
> The root cause is inode buffer head is NULL when calling ocfs2_refcount_cow.
> Secondly, we should use EX meta lock when calling ocfs2_refcount_cow.
> 
Before commit e74540b28556, we may also use NULL buffer head in case of
overwrite, so why there is no such issue before?

Thanks,
Joseph