Hi all:
I noticed that ND_MIN_NAMESPACE_SIZE is defined as 4MB.
nvdimm_namespace_common_probe(..){..
if (size < ND_MIN_NAMESPACE_SIZE) {
dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n",
&size, ND_MIN_NAMESPACE_SIZE);
return ERR_PTR(-ENODEV);
}...}
In our configuration, we have a host based software enumerated PMEM device that
could be much smaller than 4MB.Because of above failure, no PMEM device was
exposed.
I changed ND_MIN_NAMESPACE_SIZE to smaller size (such as 256 KB) and a smaller
size (<4MB) Persistent Memory starts working.Is there any reason that it cannot
be smaller?
Thanks
Cheng-mean
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