Messages in this thread | | | Date | Fri, 15 Sep 2017 18:12:38 -0400 | From | Theodore Ts'o <> | Subject | Re: [PATCH] vfs: introduce UMOUNT_WAIT which waits for umount completion |
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On Fri, Sep 15, 2017 at 11:44:33AM -0700, Jaegeuk Kim wrote: > > So, I digged it in more detail, and found, in drivers/android/binder.c [1], > - binder_ioctl() > - create a kernel thread > - zombie_cleanup_check() > - binder_defer_work() > - queue_work(..., &binder_deferred_work); > > - binder_deferred_func() > - binder_clear_zombies() > - binder_proc_clear_zombies() > - put_files_struct() > - close_files() > - filp_close() > - fput() > > It seems binder holds some proc files.
If binder was holding some files open, then umount should have failed with EBUSY, no?
Does Android use mount namespaces at all?
- Ted
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