linux-kernel - Re: [PATCH 3/3] btrfs: use timespec64 for i

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Message-ID: <CAK8P3a01n5shWS9x6q8Camd0WyuSfSRftthmUBQHYgPLOBUTWQ@mail.gmail.com>
Date:   Wed, 20 Jun 2018 21:41:44 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Nikolay Borisov <nborisov@...e.com>
Cc:     David Sterba <dsterba@...e.cz>, Chris Mason <clm@...com>,
        Josef Bacik <jbacik@...com>, David Sterba <dsterba@...e.com>,
        y2038 Mailman List <y2038@...ts.linaro.org>,
        Omar Sandoval <osandov@...com>, Liu Bo <bo.li.liu@...cle.com>,
        linux-btrfs <linux-btrfs@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] btrfs: use timespec64 for i_otime

On Wed, Jun 20, 2018 at 9:34 PM, Nikolay Borisov <nborisov@...e.com> wrote:
>
>
> On 20.06.2018 19:38, David Sterba wrote:
>> On Wed, Jun 20, 2018 at 04:34:34PM +0200, Arnd Bergmann wrote:
>>> While the regular inode timestamps all use timespec64 now, the
>>> i_otime field is btrfs specific and still needs to be converted
>>> to correctly represent times beyond 2038.
>>>
>>> Signed-off-by: Arnd Bergmann <arnd@...db.de>
>>
>> This patch addresses the remaining type conversions, so I'm going to
>> merge it, thanks.
>>
>
> Actually for the sake of consistency we might want to merge this series
> altogether. As it stands we now use ktime_get_seconds and
> ktime_get_real_seconds (from Allen's patch). I haven't dug to see what's
> the difference (if any) between the two .

I just checked again and see that Allen's patch addresses the first two
of my three patches, but he picked a different approach for
transaction_kthread(): My patch moved to CLOCK_MONOTONIC,
while his version only changed the to time64_t but kept the
CLOCK_REALTIME behavior. It's a small difference, but I think
my version is slightly better. My patch 2/3 is identical to his version.

If you like, I can also rebase my patch 1/3 on top of his patch and
change it to CLOCK_MONOTONIC.

         Arnd