linux-kernel - Re: [PATCH 7/7] libnvdimm/pfn: Fix 'start

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Message-ID: <x49a7inwxga.fsf@segfault.boston.devel.redhat.com>
Date:   Fri, 22 Feb 2019 12:21:41 -0500
From:   Jeff Moyer <jmoyer@...hat.com>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     linux-nvdimm <linux-nvdimm@...ts.01.org>,
        stable <stable@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Vishal L Verma <vishal.l.verma@...el.com>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Linux MM <linux-mm@...ck.org>
Subject: Re: [PATCH 7/7] libnvdimm/pfn: Fix 'start_pad' implementation

Dan Williams <dan.j.williams@...el.com> writes:

>> Great!  Now let's create another one.
>>
>> # ndctl create-namespace -m fsdax -s 132m
>> libndctl: ndctl_pfn_enable: pfn1.1: failed to enable
>>   Error: namespace1.2: failed to enable
>>
>> failed to create namespace: No such device or address
>>
>> (along with a kernel warning spew)
>
> I assume you're seeing this on the libnvdimm-pending branch?

Yes, but also on linus' master branch.  Things have been operating in
this manner for some time.

>> I understand the desire for expediency.  At some point, though, we have
>> to address the root of the problem.
>
> Well, you've defibrillated me back to reality. We've suffered the
> incomplete broken hacks for 2 years, what's another 10 weeks? I'll
> dust off the sub-section patches and take another run at it.

OK, thanks.  Let me know if I can help at all.

Cheers,
Jeff