linux-kernel - Re: [PATCH v2 0/4] libnvdimm: Cross-arch compatible namespace alignment

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Message-ID: <x49blq0dgp8.fsf@segfault.boston.devel.redhat.com>
Date:   Fri, 14 Feb 2020 16:03:47 -0500
From:   Jeff Moyer <jmoyer@...hat.com>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     linux-nvdimm@...ts.01.org, Oliver O'Halloran <oohall@...il.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v2 0/4] libnvdimm: Cross-arch compatible namespace alignment

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

> ---
>
> Explicit review requests, but any other feedback is of course
> appreciated:
>
> Patch1 needs an ack from ppc arch maintainers, and I'd like a tested-by
> from Aneesh that this still works to solve the ppc issue. Jeff, does
> this look good to you?

OK, I've reviewed everything.  Testing looks good with the change I
mentioned (memremap_compat_align returning PAGE_SIZE).  I made sure a
4k-aligned namespace created under an unpatched kernel would be
accessible under a patched kernel.  I also made sure that manually
setting align would allow for creating of poorly aligned namespaces, and
that those namespaces were then accessible on the unpatched kernel.

Thanks, Dan!

-Jeff