Messages in this thread | | | Date | Tue, 14 Apr 2015 13:44:29 +0100 | From | Al Viro <> | Subject | Re: I_CLEAR bug while shrinking dcache |
| |
On Tue, Apr 14, 2015 at 10:12:54AM +0200, Samuel Thibault wrote:
> So it seems that shrink_dentry_list was trying to kill an inode which > already has I_CLEAR. I'll be trying the attached patch in the next > days.
That patch is just papering over the problem. What you have is a dentry with ->d_inode pointing to something with I_CLEAR set.
So either * dentry has already been through __dentry_kill() * or you have live dentry with ->d_inode somehow not contributing to refcount of ->d_inode * or you have an inode with positive refcount and I_CLEAR set.
The first variant can happen, but in that case it should have had DCACHE_DENTRY_KILLED set by said __dentry_kill() and skipped. The other two are clear inode refcounting bugs.
Do you have a reproducer for that?
| |