From: Ingo Molnar <mingo@elte.hu>
To: viro@parcelfarce.linux.theplanet.co.uk
Cc: Linus Torvalds <torvalds@osdl.org>, Tridge <tridge@samba.org>,
Jamie Lokier <jamie@shareable.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: explicit dcache <-> user-space cache coherency, sys_mark_dir_clean(), O_CLEAN
Date: Sat, 21 Feb 2004 18:46:31 +0100 [thread overview]
Message-ID: <20040221174631.GA8728@elte.hu> (raw)
In-Reply-To: <20040221080426.GO31035@parcelfarce.linux.theplanet.co.uk>
* viro@parcelfarce.linux.theplanet.co.uk <viro@parcelfarce.linux.theplanet.co.uk> wrote:
> On Sat, Feb 21, 2004 at 08:58:53AM +0100, Ingo Molnar wrote:
> > filesystems that dont have 64-bit, monotonic timestamps will return
> > -ENOSYS. This should include even XFS at the moment, because the
> > timestamp is not guaranteed to be monotonic.
>
> > any other problems with this concept?
>
> If we are demanding specific filesystems, we could simply say "use JFS
> in case-insensitive mode" and be done with that. Which deals with all
> problems, since fs code will guarantee uniqueness, etc.
what i propose is a pretty generic feature that we need anyway (current
32-bit, 1-sec granular mtime in most filesystems is already problematic
for things like make dependencies), while "use JFS in case-insensitive
mode" is to degrade a filesystem to a non-POSIX mode. I dont think the
two approaches are equivalent. Having good, monotonic, finegrained
timestamps is a thing of the future - case-insensitive lowlevel
filesystems are a thing of the past.
Ingo
next prev parent reply other threads:[~2004-02-21 17:45 UTC|newest]
Thread overview: 123+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-17 4:12 UTF-8 and case-insensitivity tridge
2004-02-17 5:11 ` Linus Torvalds
2004-02-17 6:54 ` tridge
2004-02-17 8:33 ` Neil Brown
2004-02-17 22:48 ` tridge
2004-02-18 0:06 ` Neil Brown
2004-02-18 9:47 ` Helge Hafting
2004-02-17 15:13 ` Linus Torvalds
2004-02-17 16:57 ` Linus Torvalds
2004-02-17 19:44 ` viro
2004-02-17 20:10 ` Linus Torvalds
2004-02-17 20:17 ` viro
2004-02-17 20:23 ` Linus Torvalds
2004-02-17 21:08 ` Robin Rosenberg
2004-02-17 21:17 ` Linus Torvalds
2004-02-17 22:27 ` Robin Rosenberg
2004-02-18 3:02 ` tridge
2004-02-17 23:57 ` tridge
2004-02-17 23:20 ` tridge
2004-02-17 23:43 ` Linus Torvalds
2004-02-18 3:26 ` tridge
2004-02-18 5:33 ` H. Peter Anvin
2004-02-18 7:54 ` Marc Lehmann
2004-02-18 2:37 ` H. Peter Anvin
2004-02-18 3:03 ` Linus Torvalds
2004-02-18 3:14 ` H. Peter Anvin
2004-02-18 3:27 ` Linus Torvalds
2004-02-18 21:31 ` tridge
2004-02-18 22:23 ` Linus Torvalds
2004-02-18 22:28 ` Linus Torvalds
2004-02-18 22:50 ` tridge
2004-02-18 22:59 ` Linus Torvalds
2004-02-18 23:09 ` tridge
2004-02-18 23:16 ` Linus Torvalds
2004-02-19 8:10 ` Jamie Lokier
2004-02-19 16:09 ` Linus Torvalds
2004-02-19 16:38 ` Jamie Lokier
2004-02-19 16:54 ` Linus Torvalds
2004-02-19 18:29 ` Jamie Lokier
2004-02-19 19:48 ` Eureka! (was Re: UTF-8 and case-insensitivity) Linus Torvalds
2004-02-19 19:51 ` Linus Torvalds
2004-02-19 19:48 ` H. Peter Anvin
2004-02-19 20:04 ` Linus Torvalds
2004-02-19 20:05 ` viro
2004-02-19 20:23 ` Linus Torvalds
2004-02-19 20:32 ` Linus Torvalds
2004-02-19 20:45 ` viro
2004-02-19 21:26 ` Linus Torvalds
2004-02-19 21:38 ` Linus Torvalds
2004-02-19 21:45 ` Linus Torvalds
2004-02-19 21:43 ` viro
2004-02-19 21:53 ` Linus Torvalds
2004-02-19 22:21 ` David Lang
2004-02-19 20:48 ` Jamie Lokier
2004-02-19 21:30 ` Linus Torvalds
2004-02-20 0:00 ` Jamie Lokier
2004-02-20 0:17 ` Linus Torvalds
2004-02-20 0:24 ` Linus Torvalds
2004-02-20 0:30 ` Trond Myklebust
2004-02-20 0:54 ` Jamie Lokier
2004-02-20 0:57 ` tridge
2004-02-20 1:07 ` Paul Wagland
2004-02-20 13:31 ` Chris Wedgwood
2004-02-20 0:46 ` Jamie Lokier
2004-02-23 10:13 ` Tim Connors
2004-02-20 1:39 ` Junio C Hamano
2004-02-20 12:54 ` Jamie Lokier
2004-02-19 23:37 ` tridge
2004-02-20 0:02 ` Linus Torvalds
2004-02-20 0:16 ` tridge
2004-02-20 0:37 ` Linus Torvalds
2004-02-20 1:26 ` tridge
2004-02-20 1:07 ` H. Peter Anvin
2004-02-20 2:30 ` Theodore Ts'o
2004-02-20 12:04 ` explicit dcache <-> user-space cache coherency, sys_mark_dir_clean(), O_CLEAN Ingo Molnar
2004-02-20 13:19 ` Jamie Lokier
2004-02-20 13:37 ` Ingo Molnar
2004-02-20 14:00 ` Ingo Molnar
2004-02-20 16:31 ` Jamie Lokier
2004-02-20 13:23 ` [patch] " Ingo Molnar
2004-02-20 18:00 ` viro
2004-02-20 15:41 ` Linus Torvalds
2004-02-20 17:04 ` Ingo Molnar
2004-02-20 17:19 ` Linus Torvalds
2004-02-20 18:48 ` Ingo Molnar
2004-02-21 1:44 ` Jamie Lokier
2004-02-21 7:58 ` Ingo Molnar
2004-02-21 8:04 ` viro
2004-02-21 17:46 ` Ingo Molnar [this message]
2004-02-21 18:15 ` Linus Torvalds
2004-02-21 8:26 ` Keith Owens
2004-02-23 10:59 ` Pavel Machek
2004-02-23 13:55 ` Jamie Lokier
2004-02-23 16:45 ` Ingo Molnar
2004-02-23 17:32 ` Jamie Lokier
2004-02-20 23:00 ` tridge
2004-02-20 17:33 ` Jamie Lokier
2004-02-20 18:22 ` Linus Torvalds
2004-02-21 0:38 ` Jamie Lokier
2004-02-21 1:10 ` Linus Torvalds
2004-02-21 3:01 ` Jamie Lokier
2004-02-20 17:47 ` Jamie Lokier
2004-02-20 20:38 ` Christer Weinigel
2004-02-22 15:07 ` Jamie Lokier
2004-02-22 16:55 ` Miquel van Smoorenburg
2004-02-19 19:08 ` UTF-8 and case-insensitivity Helge Hafting
2004-02-18 4:08 ` tridge
2004-02-18 10:05 ` Robin Rosenberg
2004-02-18 11:43 ` tridge
2004-02-18 12:31 ` Robin Rosenberg
2004-02-18 16:48 ` H. Peter Anvin
2004-02-18 20:00 ` H. Peter Anvin
2004-02-19 2:53 ` Daniel Newby
2004-02-17 5:25 ` Tim Connors
2004-02-17 7:43 ` H. Peter Anvin
2004-02-17 8:05 ` H. Peter Anvin
2004-02-17 14:25 ` Dave Kleikamp
2004-02-18 0:16 ` Robert White
2004-02-18 0:20 ` Linus Torvalds
2004-02-18 1:03 ` Robert White
2004-02-18 21:48 ` Ville Herva
2004-02-18 2:48 ` tridge
2004-02-18 20:56 ` Robert White
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