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authorDan Williams <dan.j.williams@intel.com>2018-02-01 21:27:22 -0800
committerDan Williams <dan.j.williams@intel.com>2018-02-01 21:27:22 -0800
commitf2ba5a5baecf795c2150826bd0c95fc3f7f3d226 (patch)
tree50d1a64e01d13f5701b48da8a4a76b7fbc7d410a /include/uapi/linux
parent0fb5c8df609eaca3cb7c24e7f91470f8dd5984ec (diff)
libnvdimm, namespace: make min namespace size 4K
The arbitrary 4MB minimum namespace size turns out to be too large for some environments. Quoting Cheng-mean Liu: In the case of emulated NVDIMM devices in the VM environment, there are scenarios that NVDIMM device with much smaller sizes are desired, for example, we might use a single enumerated NVDIMM DAX device for representing each container layer, which in some cases could be just a few KBs size. PAGE_SIZE is the minimum where we can still support DAX of at least a single page. Cc: Matthew Wilcox <willy@infradead.org> Reported-by: Cheng-mean Liu <soccerl@microsoft.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/uapi/linux')
-rw-r--r--include/uapi/linux/ndctl.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/uapi/linux/ndctl.h b/include/uapi/linux/ndctl.h
index 30ef1236aafa..7e27070b9440 100644
--- a/include/uapi/linux/ndctl.h
+++ b/include/uapi/linux/ndctl.h
@@ -209,7 +209,7 @@ enum nd_driver_flags {
};
enum {
- ND_MIN_NAMESPACE_SIZE = 0x00400000,
+ ND_MIN_NAMESPACE_SIZE = PAGE_SIZE,
};
enum ars_masks {

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