From: Benjamin LaHaise <bcrl@redhat.com>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Jeff Dike <jdike@karaya.com>, Andrea Arcangeli <andrea@suse.de>,
Christoph Hellwig <hch@infradead.org>,
linux-kernel@vger.kernel.org, linux-aio@kvack.org
Subject: Re: async-io API registration for 2.5.29
Date: Tue, 30 Jul 2002 14:31:46 -0400 [thread overview]
Message-ID: <20020730143146.G10315@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.33.0207301114001.2534-100000@penguin.transmeta.com>; from torvalds@transmeta.com on Tue, Jul 30, 2002 at 11:15:26AM -0700
On Tue, Jul 30, 2002 at 11:15:26AM -0700, Linus Torvalds wrote:
> That still doesn't get the TLB advantages of a globally shared page at the
> same address.. It also has the overhead of mapping it, which you don't
> have if the thing is just always in the address space, and all processes
> just get created with that page mapped. That can be a big deal for process
> startup latency for small processes.
That might be a concern once glibc startup can occur with less than a few
dozen calls to grope through the local files. ;-) Hmmm, it would be possible
to make the vsyscall page mapped by default and leave the global bit enabled
until UML forcibly unmapped it (and then clear the global bit and do a global
invalidate). Would that be acceptible?
-ben
--
"You will be reincarnated as a toad; and you will be much happier."
next prev parent reply other threads:[~2002-07-30 18:28 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-30 5:41 async-io API registration for 2.5.29 Andrea Arcangeli
2002-07-30 8:11 ` Christoph Hellwig
2002-07-30 13:40 ` Linus Torvalds
2002-07-30 13:52 ` Benjamin LaHaise
2002-07-30 16:43 ` Andrea Arcangeli
2002-07-30 16:59 ` Benjamin LaHaise
2002-07-30 19:10 ` Jeff Dike
2002-07-30 18:09 ` Benjamin LaHaise
2002-07-30 18:15 ` Linus Torvalds
2002-07-30 18:31 ` Benjamin LaHaise [this message]
2002-07-30 20:57 ` Jeff Dike
2002-07-30 20:47 ` Jeff Dike
2002-07-30 21:26 ` Andrea Arcangeli
2002-07-30 10:50 ` Rik van Riel
2002-07-30 12:49 ` Benjamin LaHaise
2002-07-30 13:29 ` Suparna Bhattacharya
2002-07-30 21:41 ` Andrea Arcangeli
2002-07-30 21:54 ` [rfc] aio-core for 2.5.29 (Re: async-io API registration for 2.5.29) Benjamin LaHaise
2002-07-31 0:44 ` Andrea Arcangeli
2002-07-31 14:46 ` Benjamin LaHaise
2002-07-31 16:31 ` Charles 'Buck' Krasic
2002-08-01 10:30 ` Pavel Machek
2002-08-01 14:47 ` Benjamin LaHaise
2002-08-01 15:00 ` Chris Friesen
2002-08-01 16:09 ` Linus Torvalds
2002-08-01 17:30 ` Alan Cox
2002-08-01 16:30 ` Linus Torvalds
2002-08-01 16:41 ` [rfc] aio-core for 2.5.29 (Re: async-io API registration for2.5.29) Chris Friesen
2002-08-01 18:01 ` [rfc] aio-core for 2.5.29 (Re: async-io API registration for 2.5.29) Benjamin LaHaise
2002-08-15 23:54 ` aio-core why not using SuS? [Re: [rfc] aio-core for 2.5.29 (Re: async-io API registration for 2.5.29)] Andrea Arcangeli
2002-08-16 1:42 ` Benjamin LaHaise
2002-08-16 1:57 ` Andrea Arcangeli
2002-08-16 2:00 ` Benjamin LaHaise
2002-08-16 2:08 ` Linus Torvalds
2002-08-16 2:16 ` Benjamin LaHaise
2002-08-16 2:40 ` Andrea Arcangeli
2002-08-16 3:43 ` Linus Torvalds
2002-08-16 3:50 ` Linus Torvalds
2002-08-16 4:47 ` William Lee Irwin III
2002-08-17 3:46 ` Martin J. Bligh
2002-08-17 4:00 ` Linus Torvalds
2002-08-17 4:15 ` Martin J. Bligh
2002-08-17 4:46 ` Linus Torvalds
2001-11-02 5:12 ` Pavel Machek
2002-08-17 5:04 ` Linus Torvalds
2002-08-17 5:24 ` lots of mem on 32 bit machines (was: aio-core why not using SuS?) Martin J. Bligh
2002-08-17 5:12 ` aio-core why not using SuS? [Re: [rfc] aio-core for 2.5.29 (Re: async-io API registration for 2.5.29)] Martin J. Bligh
2002-08-17 17:02 ` Linus Torvalds
2002-08-17 21:27 ` 32 bit arch with lots of RAM Martin J. Bligh
2002-08-22 16:30 ` Andrea Arcangeli
2002-08-22 16:36 ` Martin J. Bligh
2002-08-22 16:15 ` aio-core why not using SuS? [Re: [rfc] aio-core for 2.5.29 (Re: async-io API registration for 2.5.29)] Andrea Arcangeli
2002-08-22 16:12 ` Andrea Arcangeli
2002-08-20 0:35 ` Ingo Molnar
2002-08-17 4:36 ` William Lee Irwin III
2002-08-16 2:32 ` Rik van Riel
2002-08-16 2:32 ` Andrea Arcangeli
2002-08-16 9:39 ` Suparna Bhattacharya
2002-08-16 10:03 ` Andrea Arcangeli
2002-08-16 11:23 ` Suparna Bhattacharya
2002-08-16 11:28 ` Suparna Bhattacharya
2002-08-16 13:49 ` Dan Kegel
2002-09-02 18:40 ` Andrea Arcangeli
2002-09-03 12:04 ` aio-core in 2.5 - io_queue_wait and io_getevents Suparna Bhattacharya
2002-09-05 5:21 ` aio-core why not using SuS? [Re: [rfc] aio-core for 2.5.29 (Re: async-io API registration for 2.5.29)] Benjamin LaHaise
2002-08-16 13:43 ` Dan Kegel
2002-08-16 14:21 ` Jamie Lokier
2002-08-16 14:42 ` Benjamin LaHaise
2002-08-16 15:40 ` John Gardiner Myers
2002-08-23 16:11 ` aio-core why not using SuS? [Re: [rfc] aio-core for 2.5.29 (Re:async-io " Dan Kegel
2002-08-16 1:53 ` aio-core why not using SuS? [Re: [rfc] aio-core for 2.5.29 (Re: async-io " Dan Kegel
2002-08-01 19:18 ` [rfc] aio-core for 2.5.29 (Re: async-io API registration for 2.5.29) Chris Wedgwood
2002-08-01 19:25 ` Linus Torvalds
2002-08-01 19:31 ` Chris Wedgwood
2002-08-02 8:24 ` Pavel Machek
2002-08-02 11:59 ` Alan Cox
2002-08-02 15:56 ` Linus Torvalds
2002-07-31 1:20 ` async-io API registration for 2.5.29 Rik van Riel
2002-07-31 1:32 ` Andrea Arcangeli
2002-07-31 8:25 ` Christoph Hellwig
2002-07-31 13:19 ` Andrea Arcangeli
2002-07-30 13:34 ` Linus Torvalds
2002-07-30 16:49 ` Andrea Arcangeli
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