linux-kernel - Re: [RFC v2 09/83] Add Kconfig and Makefile

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Message-ID: <CAD4SzjunDkKhXMO5PvCnhqUebXt4_f7d7725qNs+Dz7Xv1vohg@mail.gmail.com>
Date:   Sun, 11 Mar 2018 14:32:09 -0700
From:   Andiry Xu <jix024@....ucsd.edu>
To:     Nikolay Borisov <n.borisov.lkml@...il.com>
Cc:     Linux FS Devel <linux-fsdevel@...r.kernel.org>,
        linux-kernel@...r.kernel.org,
        "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        Dan Williams <dan.j.williams@...el.com>,
        "Rudoff, Andy" <andy.rudoff@...el.com>, coughlan@...hat.com,
        Steven Swanson <swanson@...ucsd.edu>,
        Dave Chinner <david@...morbit.com>, jack@...e.com,
        swhiteho@...hat.com, miklos@...redi.hu,
        Jian Xu <andiry.xu@...il.com>, Andiry Xu <jix024@...ucsd.edu>
Subject: Re: [RFC v2 09/83] Add Kconfig and Makefile

On Sun, Mar 11, 2018 at 5:15 AM, Nikolay Borisov
<n.borisov.lkml@...il.com> wrote:
>
>
> On 10.03.2018 20:17, Andiry Xu wrote:
>> From: Andiry Xu <jix024@...ucsd.edu>
>>
>> Signed-off-by: Andiry Xu <jix024@...ucsd.edu>
>> ---
>>  fs/Kconfig       |  2 ++
>>  fs/Makefile      |  1 +
>>  fs/nova/Kconfig  | 15 +++++++++++++++
>>  fs/nova/Makefile |  7 +++++++
>>  4 files changed, 25 insertions(+)
>>  create mode 100644 fs/nova/Kconfig
>>  create mode 100644 fs/nova/Makefile
>>
>> diff --git a/fs/Kconfig b/fs/Kconfig
>> index bc821a8..5e9ff3e 100644
>> --- a/fs/Kconfig
>> +++ b/fs/Kconfig
>> @@ -58,6 +58,8 @@ config FS_DAX_PMD
>>       depends on ZONE_DEVICE
>>       depends on TRANSPARENT_HUGEPAGE
>>
>> +source "fs/nova/Kconfig"
>> +
>>  # Selected by DAX drivers that do not expect filesystem DAX to support
>>  # get_user_pages() of DAX mappings. I.e. "limited" indicates no support
>>  # for fork() of processes with MAP_SHARED mappings or support for
>> diff --git a/fs/Makefile b/fs/Makefile
>> index add789e..65ea619 100644
>> --- a/fs/Makefile
>> +++ b/fs/Makefile
>> @@ -113,6 +113,7 @@ obj-$(CONFIG_OMFS_FS)             += omfs/
>>  obj-$(CONFIG_JFS_FS)         += jfs/
>>  obj-$(CONFIG_XFS_FS)         += xfs/
>>  obj-$(CONFIG_9P_FS)          += 9p/
>> +obj-$(CONFIG_NOVA_FS)                += nova/
>>  obj-$(CONFIG_AFS_FS)         += afs/
>>  obj-$(CONFIG_NILFS2_FS)              += nilfs2/
>>  obj-$(CONFIG_BEFS_FS)                += befs/
>> diff --git a/fs/nova/Kconfig b/fs/nova/Kconfig
>> new file mode 100644
>> index 0000000..c1c692e
>> --- /dev/null
>> +++ b/fs/nova/Kconfig
>> @@ -0,0 +1,15 @@
>> +config NOVA_FS
>> +     tristate "NOVA: log-structured file system for non-volatile memories"
>> +     depends on FS_DAX
>> +     select CRC32
>
> What do you need crc32 for? Selecting libcrc32c is enough to do "the
> right thing"
>

I think this is the legacy of the removed NOVA-Fortis code. I will double check.

Thanks,
Andiry

>> +     select LIBCRC32C
>> +     help
>> +       If your system has a block of fast (comparable in access speed to
>> +       system memory) and non-volatile byte-addressable memory and you wish
>> +       to mount a light-weight filesystem with strong consistency support
>> +       over it, say Y here.
>> +
>> +       To compile this as a module, choose M here: the module will be
>> +       called nova.
>> +
>> +       If unsure, say N.
>> diff --git a/fs/nova/Makefile b/fs/nova/Makefile
>> new file mode 100644
>> index 0000000..eb19646
>> --- /dev/null
>> +++ b/fs/nova/Makefile
>> @@ -0,0 +1,7 @@
>> +#
>> +# Makefile for the linux NOVA filesystem routines.
>> +#
>> +
>> +obj-$(CONFIG_NOVA_FS) += nova.o
>> +
>> +nova-y := bbuild.o inode.o rebuild.o super.o
>>