linux-kernel - Re: [PATCH] BTT: Change nd_btt_arena_is

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Message-ID: <CAPcyv4iBk+DwHRBu=zAzSYrqD3Ni_cdK2630FuREtAhtDk5rdw@mail.gmail.com>
Date:	Fri, 18 Dec 2015 09:54:16 -0800
From:	Dan Williams <dan.j.williams@...el.com>
To:	Toshi Kani <toshi.kani@....com>
Cc:	Vishal Verma <vishal@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	micah.parrish@....com,
	"linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>
Subject: Re: [PATCH] BTT: Change nd_btt_arena_is_valid() to verify UUID

On Fri, Dec 18, 2015 at 7:15 AM, Toshi Kani <toshi.kani@....com> wrote:
> On Fri, 2015-12-18 at 01:34 -0700, Vishal Verma wrote:
>> Also, I wonder if this problem is solved by using libndctl to manage
>> BTTs.
>
> I have not tested with libndctl yet, but I think our bind/unbind scripts do
> the same procedures.

We loop through all combinations of sector size in our unit test.  If
you want to change the sector size the expectation is that the
namespace is destroyed and fully re-created, especially due to the
fact that changing sector size invalidates all data on the namespace.

See: https://github.com/pmem/ndctl/blob/master/lib/test-libndctl.c
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