Hi, On Mon 13-08-18 11:10:23, Jia-Ju Bai wrote: > The kernel may sleep with holding a spinlock. > > The function call paths (from bottom to top) in Linux-4.16 are: > > [FUNC] schedule > fs/dax.c, 259: schedule in get_unlocked_mapping_entry > fs/dax.c, 450: get_unlocked_mapping_entry in __dax_invalidate_mapping_entry > fs/dax.c, 471: __dax_invalidate_mapping_entry in dax_delete_mapping_entry > mm/truncate.c, 97: dax_delete_mapping_entry in > truncate_exceptional_pvec_entries > mm/truncate.c, 82: spin_lock_irq in truncate_exceptional_pvec_entries > > I do not find a good way to fix, so I only report. > This is found by my static analysis tool (DSAC). Thanks for report but this is a false positive. Note that the lock is acquired only if we are not operating on DAX mapping but we can get to dax_delete_mapping_entry() only if we are operating on DAX mapping. Honza -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR
