From: Al Viro <viro@ZenIV.linux.org.uk>
To: Dave Chinner <david@fromorbit.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Linux 3.11-rc2
Date: Mon, 22 Jul 2013 05:06:01 +0100 [thread overview]
Message-ID: <20130722040601.GK4165@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20130722012517.GD11674@dastard>
On Mon, Jul 22, 2013 at 11:25:17AM +1000, Dave Chinner wrote:
> I'll just point out that it can make the whole thing worse, too.
> For example, for ext3/4, the tmpfile being created has to be added
> to the orphan inode list which is protected by a filesystem global
> mutex. Hence scalability of O_TMPFILE is massively limited on
> ext3/ext4 due to architectural issues within ext3/4. Other
> filesystems will be more efficient, but because they have more
> scalable/complex orphan inode handling it's going to take longer to
> implement O_TMPFILE support for them....
Um... You do realize that the same architectural issues there will
create exactly the same serialization when you are unlinking the
sucker? I.e. with the "pick the name, create and open, unlink" sequence
ext[34] will insert that inode into the same orphan list, creating
the same contention...
next prev parent reply other threads:[~2013-07-22 4:06 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-21 19:53 Linux 3.11-rc2 Linus Torvalds
2013-07-21 21:07 ` Tobias Klausmann
2013-07-22 13:08 ` Rafael J. Wysocki
2013-07-22 15:43 ` Tobias Klausmann
2013-07-21 23:08 ` James Hogan
2013-07-22 13:02 ` Rafael J. Wysocki
2013-07-22 13:15 ` Martin Steigerwald
2013-07-22 13:37 ` Rafael J. Wysocki
2013-07-22 18:46 ` Martin Steigerwald
2013-07-22 19:57 ` Rafael J. Wysocki
2013-07-24 5:10 ` Kalle Valo
2013-07-22 13:21 ` James Hogan
2013-07-22 18:11 ` Linus Torvalds
2013-07-22 19:54 ` Rafael J. Wysocki
2013-07-23 18:46 ` Linux 3.11-rc2 (acpi backlight) Kamal Mostafa
2013-07-24 0:05 ` Rafael J. Wysocki
2013-07-24 4:54 ` Steven Newbury
2013-07-24 6:49 ` James Hogan
2013-07-24 7:14 ` Mike Galbraith
2013-07-24 7:19 ` Igor Gnatenko
2013-07-24 7:19 ` Igor Gnatenko
2013-07-24 12:06 ` Rafael J. Wysocki
2013-07-24 11:45 ` Jörg Otte
2013-07-25 13:00 ` Linux 3.11-rc2 (acpi backlight, revert) Rafael J. Wysocki
2013-07-25 13:00 ` Rafael J. Wysocki
2013-07-25 14:13 ` Aaron Lu
2013-07-25 14:43 ` Kamal Mostafa
2013-07-25 14:46 ` Daniel Vetter
2013-07-25 14:46 ` Daniel Vetter
2013-07-25 14:59 ` Kamal Mostafa
2013-07-25 14:52 ` Jörg Otte
2013-07-25 14:52 ` Jörg Otte
2013-07-25 15:52 ` Jörg Otte
2013-07-25 15:52 ` Jörg Otte
2013-07-25 19:14 ` James Hogan
2013-07-25 19:14 ` James Hogan
2013-07-25 19:47 ` Rafael J. Wysocki
2013-07-25 19:47 ` Rafael J. Wysocki
2013-07-26 4:23 ` Joerg Platte
2013-07-26 11:22 ` Igor Gnatenko
2013-07-26 11:22 ` Igor Gnatenko
2013-07-26 7:43 ` Steven Newbury
2013-07-26 7:43 ` Steven Newbury
2013-07-26 12:09 ` Martin Steigerwald
2013-07-26 12:09 ` Martin Steigerwald
2013-07-26 12:40 ` Rafael J. Wysocki
2013-07-26 12:40 ` Rafael J. Wysocki
2013-08-04 19:33 ` Martin Steigerwald
2013-08-04 19:33 ` Martin Steigerwald
2013-08-04 22:15 ` Rafael J. Wysocki
2013-08-04 22:15 ` Rafael J. Wysocki
2013-07-27 5:34 ` Kalle Valo
2013-07-27 12:18 ` Rafael J. Wysocki
2013-07-27 12:18 ` Rafael J. Wysocki
2013-07-22 18:16 ` Linux 3.11-rc2 Matthew Garrett
2013-07-22 19:56 ` Rafael J. Wysocki
2013-07-23 17:47 ` Steven Newbury
2013-07-23 19:51 ` Matthew Garrett
2013-07-23 19:51 ` Matthew Garrett
2013-07-23 21:10 ` Steven Newbury
2013-07-23 21:24 ` Rafael J. Wysocki
2013-07-23 22:49 ` Steven Newbury
2013-07-22 1:25 ` Dave Chinner
2013-07-22 4:06 ` Al Viro [this message]
2013-07-24 3:22 ` Dave Chinner
2013-07-23 1:04 ` rydberg
2013-07-23 1:17 ` Myklebust, Trond
2013-07-23 18:31 ` Myklebust, Trond
2013-07-23 19:08 ` rydberg
2013-07-23 20:42 ` Linus Torvalds
2013-07-23 20:52 ` Myklebust, Trond
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