From: Steve French <smfrench@gmail.com>
To: David Howells <dhowells@redhat.com>
Cc: Jeff Layton <jlayton@kernel.org>,
Latchesar Ionkov <lucho@ionkov.net>,
Konstantin Komarov <almaz.alexandrovich@paragon-software.com>,
"Rafael J . Wysocki" <rafael@kernel.org>,
"Darrick J. Wong" <djwong@kernel.org>,
Anders Larsen <al@alarsen.net>,
Carlos Llamas <cmllamas@google.com>,
Andrii Nakryiko <andrii@kernel.org>,
Mattia Dongili <malattia@linux.it>,
Hugh Dickins <hughd@google.com>,
John Johansen <john.johansen@canonical.com>,
Yonghong Song <yonghong.song@linux.dev>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Christoph Hellwig <hch@lst.de>,
Mike Marshall <hubcap@omnibond.com>,
Paulo Alcantara <pc@manguebit.com>,
linux-xfs@vger.kernel.org, Michael Ellerman <mpe@ellerman.id.au>,
James Morris <jmorris@namei.org>, Christophe Leroy <christoph>
Subject: Re: [PATCH 86/87] fs: switch timespec64 fields in inode to discrete integers
Date: Sat, 30 Sep 2023 09:50:41 -0500 [thread overview]
Message-ID: <CAH2r5ms14hPaz=Ex2a=Dj0Hz3XxYLRKFj_rHHekznTbNJ_wABQ@mail.gmail.com> (raw)
In-Reply-To: <636661.1695969129@warthog.procyon.org.uk>
On Fri, Sep 29, 2023 at 3:06 AM David Howells via samba-technical
<samba-technical@lists.samba.org> wrote:
>
>
> Jeff Layton <jlayton@kernel.org> wrote:
>
> > Correct. We'd lose some fidelity in currently stored timestamps, but as
> > Linus and Ted pointed out, anything below ~100ns granularity is
> > effectively just noise, as that's the floor overhead for calling into
> > the kernel. It's hard to argue that any application needs that sort of
> > timestamp resolution, at least with contemporary hardware.
>
> Albeit with the danger of making Steve French very happy;-), would it make
> sense to switch internally to Microsoft-style 64-bit timestamps with their
> 100ns granularity?
100ns granularity does seem to make sense and IIRC was used by various
DCE standards in the 90s and 2000s (not just used for SMB2/SMB3 protocol and
various Windows filesystems)
--
Thanks,
Steve
next prev parent reply other threads:[~2023-09-30 14:50 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-28 11:05 [PATCH 85/87] fs: rename i_atime and i_mtime fields to __i_atime and __i_mtime Jeff Layton
2023-09-28 11:05 ` [PATCH 86/87] fs: switch timespec64 fields in inode to discrete integers Jeff Layton
2023-09-28 15:48 ` Arnd Bergmann
2023-09-28 17:06 ` Jeff Layton
2023-09-28 17:19 ` Darrick J. Wong
2023-09-28 17:40 ` Jeff Layton
2023-09-28 20:21 ` Arnd Bergmann
2023-09-28 21:26 ` Theodore Ts'o
2023-09-29 0:18 ` Linus Torvalds
2023-09-29 3:50 ` Amir Goldstein
[not found] ` <CAOQ4uxg5ctY9yCjLOjN1nETAcEuNb2UERnYuDv7PoErdxX=WUw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2023-09-29 16:22 ` Linus Torvalds
2023-09-29 3:27 ` Amir Goldstein
[not found] ` <6a6f37d16b55a3003af3f3dbb7778a367f68cd8d.camel-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2023-09-29 6:32 ` David Howells
2023-09-30 14:50 ` Steve French [this message]
2023-10-01 5:01 ` [OT] " Gabriel Paubert
2023-09-29 9:44 ` Christian Brauner
2023-09-29 10:16 ` Jeff Layton
2023-09-28 17:09 ` Jeff Layton
2023-09-28 11:05 ` [PATCH 87/87] fs: move i_blocks up a few places in struct inode Jeff Layton
2023-09-28 11:35 ` Amir Goldstein
2023-09-28 12:01 ` Jeff Layton
2023-09-28 17:41 ` Linus Torvalds
2023-09-28 18:01 ` Jeff Layton
2023-09-29 9:32 ` Christian Brauner
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