Revision 9f141d6ef6258a3a37a045842d9ba7e68f368956 authored by Jan Kara on 19 October 2016, 12:34:31 UTC, committed by Dan Williams on 27 December 2016, 04:29:25 UTC
Currently ->iomap_begin() handler is called with entry lock held. If the filesystem held any locks between ->iomap_begin() and ->iomap_end() (such as ext4 which will want to hold transaction open), this would cause lock inversion with the iomap_apply() from standard IO path which first calls ->iomap_begin() and only then calls ->actor() callback which grabs entry locks for DAX (if it faults when copying from/to user provided buffers). Fix the problem by nesting grabbing of entry lock inside ->iomap_begin() - ->iomap_end() pair. Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
1 parent f449b93
File | Mode | Size |
---|---|---|
Kconfig | -rw-r--r-- | 5.7 KB |
Makefile | -rw-r--r-- | 528 bytes |
uio.c | -rw-r--r-- | 19.8 KB |
uio_aec.c | -rw-r--r-- | 4.0 KB |
uio_cif.c | -rw-r--r-- | 3.2 KB |
uio_dmem_genirq.c | -rw-r--r-- | 9.1 KB |
uio_fsl_elbc_gpcm.c | -rw-r--r-- | 12.5 KB |
uio_hv_generic.c | -rw-r--r-- | 5.2 KB |
uio_mf624.c | -rw-r--r-- | 6.1 KB |
uio_netx.c | -rw-r--r-- | 4.3 KB |
uio_pci_generic.c | -rw-r--r-- | 3.2 KB |
uio_pdrv_genirq.c | -rw-r--r-- | 7.4 KB |
uio_pruss.c | -rw-r--r-- | 6.6 KB |
uio_sercos3.c | -rw-r--r-- | 6.1 KB |
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...