Files
odroid-linux/include/linux
Dan Williams 2361db89aa libnvdimm: Notify disk drivers to revalidate region read-only
Previous kernels allowed the BLKROSET to override the disk's read-only
status. With that situation fixed the pmem driver needs to rely on
notification events to reevaluate the disk read-only status after the
host region has been marked read-write.

Recall that when libnvdimm determines that the persistent memory has
lost persistence (for example lack of energy to flush from DRAM to FLASH
on an NVDIMM-N device) it marks the region read-only, but that state can
be overridden by the user via:

   echo 0 > /sys/bus/nd/devices/regionX/read_only

...to date there is no notification that the region has restored
persistence, so the user override is the only recovery.

Fixes: 52f019d43c ("block: add a hard-readonly flag to struct gendisk")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Vishal Verma <vishal.l.verma@intel.com>
Tested-by: Vishal Verma <vishal.l.verma@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Jens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/r/161534060720.528671.2341213328968989192.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2021-04-08 22:18:36 -07:00
..
2021-02-02 00:16:57 +01:00
2020-12-09 19:26:02 -06:00
2021-01-23 14:57:21 +01:00
2020-11-06 08:08:37 -08:00
2021-03-18 00:22:51 +01:00
2020-09-21 15:00:40 -07:00
2020-12-02 09:46:55 -07:00
2021-01-24 14:27:17 +01:00
2021-02-26 09:41:03 -08:00
2021-02-17 14:07:48 +01:00
2020-12-19 11:18:38 -08:00
2021-01-21 14:06:00 -07:00
2020-10-16 17:21:51 +02:00
2021-01-16 15:12:06 -05:00
2021-01-18 14:26:51 +01:00
2021-02-08 12:28:07 +01:00
2020-12-10 12:42:59 -06:00
2020-11-16 16:31:41 +01:00
2020-11-16 15:20:01 +01:00
2020-11-16 08:14:30 -07:00
2021-02-11 13:24:44 -08:00
2020-12-02 22:10:35 -08:00
2020-11-23 14:16:55 +00:00
2021-01-27 12:27:36 +01:00
2020-09-16 08:54:53 -05:00
2020-11-24 16:47:48 +01:00
2020-12-15 16:19:31 +01:00
2021-02-26 09:41:03 -08:00
2020-12-15 16:19:31 +01:00
2021-02-17 14:12:42 +01:00
2021-01-21 16:16:10 +00:00
2021-02-26 09:41:02 -08:00
2021-02-26 09:41:03 -08:00
2020-09-04 09:25:20 -07:00
2021-01-22 15:09:42 +01:00
2021-01-14 11:20:17 +01:00
2021-02-26 09:41:03 -08:00
2021-03-13 11:27:30 -08:00
2020-09-04 12:46:07 +01:00
2021-01-04 11:42:21 -05:00
2021-02-16 16:11:14 -05:00
2021-02-02 10:26:12 +01:00
2021-02-17 13:17:49 -08:00
2021-02-26 09:40:59 -08:00
2021-01-21 14:06:00 -07:00
2021-02-03 19:05:50 +01:00
2020-08-31 12:52:33 -07:00
2020-10-18 09:27:10 -07:00
2021-01-24 14:27:17 +01:00
2021-01-24 14:27:20 +01:00
2021-02-26 09:41:03 -08:00
2020-12-03 11:20:52 +01:00
2020-08-18 17:06:15 +02:00
2021-01-16 23:19:26 +01:00
2020-12-07 17:12:49 -07:00
2020-11-06 10:05:18 -08:00
2020-12-10 16:17:15 +01:00
2021-01-28 00:35:03 +01:00
2020-11-24 16:47:49 +01:00
2020-12-10 10:45:36 +01:00
2020-09-26 22:55:05 -04:00
2021-03-02 17:25:46 -07:00
2021-02-20 10:13:32 -05:00
2020-10-30 21:57:04 +01:00
2021-01-06 16:24:59 -08:00
2021-02-09 12:27:29 -05:00
2020-12-04 16:54:35 +01:00
2021-02-13 17:17:53 +01:00
2020-11-09 18:39:36 +01:00
2020-09-10 14:03:31 -07:00
2020-08-19 14:13:20 +02:00
2021-01-21 16:16:10 +00:00
2021-02-01 13:20:07 -07:00
2021-01-18 10:52:41 +01:00
2021-02-09 12:15:07 +01:00
2021-01-21 14:06:00 -07:00
2021-03-30 13:42:33 -04:00
2021-01-24 14:27:17 +01:00
2021-02-08 22:58:55 +01:00