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From: Linda Knippers <linda.knippers@hpe.com>
To: Dan Williams <dan.j.williams@intel.com>
Cc: "linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>
Subject: ndctl: 10G not a multiple of 2M?
Date: Wed, 26 Jul 2017 14:47:47 -0400	[thread overview]
Message-ID: <5978E3D3.5020307@hpe.com> (raw)

Hi Dan,

I was creating a namespace on a 4-way interleave set and got an error
I didn't expect:

$ sudo ndctl create-namespace -m sector -s 10G -n number2
  Error: '--size=' must align to interleave-width: 4 and alignment: 2097152
  did you intend --size=12G?

I think there's a bug in validate_namespace_options().

What's happening is that since I specified my size in units of G,
the function wants the namespace to be 1G * 4 aligned rather than
2M * 4 aligned.  I suspect if I specified my size in M, it would
have worked but I can't test that at the moment.

>  size_align = max(units, size_align) * ways;

Why is units part of the equation?

-- ljk
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             reply	other threads:[~2017-07-26 18:46 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-26 18:47 Linda Knippers [this message]
2017-07-26 19:46 ` ndctl: 10G not a multiple of 2M? Dan Williams

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