Messages in this thread | | | From | Linus Torvalds <> | Date | Wed, 12 Feb 2020 12:35:04 -0800 | Subject | Re: [PATCH v8 07/11] proc: flush task dcache entries from all procfs instances |
| |
On Wed, Feb 12, 2020 at 12:03 PM Al Viro <viro@zeniv.linux.org.uk> wrote: > > What's to prevent racing with fs shutdown while you are doing the second part?
I was thinking that only the proc_flush_task() code would do this.
And that holds a ref to the vfsmount through upid->ns.
So I wasn't suggesting doing this in general - just splitting up the implementation of d_invalidate() so that proc_flush_task_mnt() could delay the complex part to after having traversed the RCU-protected list.
But hey - I missed this part of the problem originally, so maybe I'm just missing something else this time. Wouldn't be the first time.
Linus
| |