diff options
| author | Pankaj Gupta <pagupta@redhat.com> | 2019-07-05 19:33:24 +0530 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2019-07-05 15:19:10 -0700 |
| commit | fefc1d97fa4b5e016bbe15447dc3edcd9e1bcb9f (patch) | |
| tree | f18d110c2fdc771ca69ea6a83399f0c13f758664 /drivers/nvdimm | |
| parent | 6e84200c0a2994b991259d19450eee561029bf70 (diff) | |
| download | lwn-fefc1d97fa4b5e016bbe15447dc3edcd9e1bcb9f.tar.gz lwn-fefc1d97fa4b5e016bbe15447dc3edcd9e1bcb9f.zip | |
libnvdimm: add dax_dev sync flag
This patch adds 'DAXDEV_SYNC' flag which is set
for nd_region doing synchronous flush. This later
is used to disable MAP_SYNC functionality for
ext4 & xfs filesystem for devices don't support
synchronous flush.
Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
| -rw-r--r-- | drivers/nvdimm/pmem.c | 5 | ||||
| -rw-r--r-- | drivers/nvdimm/region_devs.c | 7 |
2 files changed, 11 insertions, 1 deletions
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 223da63d1bd7..8be868e2a18b 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -376,6 +376,7 @@ static int pmem_attach_disk(struct device *dev, struct gendisk *disk; void *addr; int rc; + unsigned long flags = 0UL; pmem = devm_kzalloc(dev, sizeof(*pmem), GFP_KERNEL); if (!pmem) @@ -474,7 +475,9 @@ static int pmem_attach_disk(struct device *dev, nvdimm_badblocks_populate(nd_region, &pmem->bb, &bb_res); disk->bb = &pmem->bb; - dax_dev = alloc_dax(pmem, disk->disk_name, &pmem_dax_ops); + if (is_nvdimm_sync(nd_region)) + flags = DAXDEV_F_SYNC; + dax_dev = alloc_dax(pmem, disk->disk_name, &pmem_dax_ops, flags); if (!dax_dev) { put_disk(disk); return -ENOMEM; diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index eca2e62af134..56f2227f192a 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -1211,6 +1211,13 @@ int nvdimm_has_cache(struct nd_region *nd_region) } EXPORT_SYMBOL_GPL(nvdimm_has_cache); +bool is_nvdimm_sync(struct nd_region *nd_region) +{ + return is_nd_pmem(&nd_region->dev) && + !test_bit(ND_REGION_ASYNC, &nd_region->flags); +} +EXPORT_SYMBOL_GPL(is_nvdimm_sync); + struct conflict_context { struct nd_region *nd_region; resource_size_t start, size; |