From: Benjamin LaHaise <bcrl@redhat.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: John Gardiner Myers <jgmyers@netscape.com>,
"Charles 'Buck' Krasic" <krasic@acm.org>,
Davide Libenzi <davidel@xmailserver.org>,
Dan Kegel <dank@kegel.com>, Shailabh Nagar <nagar@watson.ibm.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-aio <linux-aio@kvack.org>, Andrew Morton <akpm@digeo.com>,
David Miller <davem@redhat.com>,
Linus Torvalds <torvalds@transmeta.com>,
Stephen Tweedie <sct@redhat.com>
Subject: Re: [PATCH] async poll for 2.5
Date: Mon, 21 Oct 2002 12:50:56 -0400 [thread overview]
Message-ID: <20021021125056.B27389@redhat.com> (raw)
In-Reply-To: <1035219498.27318.205.camel@irongate.swansea.linux.org.uk>; from alan@lxorguk.ukuu.org.uk on Mon, Oct 21, 2002 at 05:58:17PM +0100
On Mon, Oct 21, 2002 at 05:58:17PM +0100, Alan Cox wrote:
> I think a chunk of the poll scaling problem is better addressed by
> futexes. If I can say "this futex list for this fd for events X Y and Z"
> I can construct almost all the efficient stuff I need out of the futex
> interfaces, much like doing it with SIGIO setting flags but a lot less
> clocks
I've structured the aio userland structure so that this is possible, just
not implemented yet. There are fields for compatible and incompatible
features, as well as the length of the header. This way, the library can
implement a faster getevents call when futex support is added, but it
always has the option of falling back to the syscall should it not understand
any changes we make to the data structure.
-ben
--
"Do you seek knowledge in time travel?"
next prev parent reply other threads:[~2002-10-21 16:45 UTC|newest]
Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-14 22:36 [PATCH] async poll for 2.5 Shailabh Nagar
2002-10-14 22:54 ` John Myers
2002-10-15 15:05 ` Benjamin LaHaise
2002-10-15 17:06 ` Dan Kegel
2002-10-15 17:03 ` Benjamin LaHaise
2002-10-15 17:18 ` Dan Kegel
2002-10-16 2:11 ` Lincoln Dale
2002-10-15 18:09 ` Shailabh Nagar
2002-10-15 18:53 ` Dan Kegel
2002-10-15 18:57 ` Benjamin LaHaise
2002-10-15 20:25 ` John Gardiner Myers
2002-10-15 21:09 ` Dan Kegel
2002-10-15 21:50 ` John Myers
2002-10-15 22:33 ` Davide Libenzi
2002-10-15 22:56 ` John Gardiner Myers
2002-10-15 23:23 ` Davide Libenzi
2002-10-16 19:16 ` John Myers
2002-10-15 21:11 ` Davide Libenzi
2002-10-15 22:01 ` John Gardiner Myers
2002-10-15 22:27 ` Davide Libenzi
2002-10-15 22:36 ` John Gardiner Myers
2002-10-15 22:41 ` Benjamin LaHaise
2002-10-15 23:26 ` John Gardiner Myers
2002-10-15 23:05 ` Davide Libenzi
2002-10-15 23:33 ` John Gardiner Myers
2002-10-16 0:05 ` Davide Libenzi
2002-10-16 0:15 ` John Myers
2002-10-16 14:25 ` Davide Libenzi
2002-10-16 18:15 ` John Gardiner Myers
2002-10-16 19:20 ` Davide Libenzi
2002-10-16 23:31 ` epoll (was Re: [PATCH] async poll for 2.5) John Gardiner Myers
2002-10-16 23:51 ` Davide Libenzi
2002-10-17 18:06 ` John Gardiner Myers
2002-10-17 18:33 ` Davide Libenzi
2002-10-18 19:02 ` John Gardiner Myers
2002-10-18 19:52 ` Davide Libenzi
2002-10-19 0:55 ` John Myers
2002-10-19 5:40 ` Davide Libenzi
2002-10-19 6:59 ` Mark Mielke
2002-10-19 17:26 ` Davide Libenzi
2002-10-19 17:48 ` Dan Kegel
2002-10-19 18:52 ` Charles 'Buck' Krasic
2002-10-19 20:18 ` Charles 'Buck' Krasic
2002-10-19 21:08 ` Dan Kegel
2002-10-22 19:35 ` John Gardiner Myers
2002-10-22 20:06 ` Davide Libenzi
2002-10-22 21:54 ` Erich Nahum
2002-10-22 22:17 ` Dan Kegel
2002-10-22 22:25 ` Davide Libenzi
2002-10-18 21:01 ` Charles 'Buck' Krasic
2002-10-18 21:33 ` Davide Libenzi
2002-10-19 1:05 ` John Myers
2002-10-19 1:27 ` Tervel Atanassov
2002-10-19 18:52 ` John G. Myers
2002-10-19 4:07 ` Charles 'Buck' Krasic
2002-10-16 20:06 ` [PATCH] async poll for 2.5 Mark Mielke
2002-10-16 23:48 ` epoll (was Re: [PATCH] async poll for 2.5) John Gardiner Myers
2002-10-17 0:23 ` Davide Libenzi
2002-10-17 17:45 ` John Myers
2002-10-16 2:45 ` [PATCH] async poll for 2.5 Charles 'Buck' Krasic
2002-10-16 14:28 ` Davide Libenzi
2002-10-17 18:47 ` Charles 'Buck' Krasic
2002-10-17 19:20 ` Davide Libenzi
2002-10-18 3:30 ` Dan Kegel
2002-10-16 18:29 ` John Gardiner Myers
2002-10-16 20:39 ` Charles 'Buck' Krasic
2002-10-17 17:59 ` epoll (was Re: [PATCH] async poll for 2.5) John Gardiner Myers
2002-10-21 16:58 ` [PATCH] async poll for 2.5 Alan Cox
2002-10-21 16:50 ` Benjamin LaHaise [this message]
2002-10-16 19:59 ` Dan Kegel
2002-10-16 20:03 ` Dan Kegel
2002-10-17 17:43 ` epoll (was Re: [PATCH] async poll for 2.5) John Myers
2002-10-18 17:00 ` Mark Mielke
2002-10-18 17:28 ` Dan Kegel
2002-10-18 17:41 ` Davide Libenzi
2002-10-18 18:55 ` Mark Mielke
2002-10-18 19:16 ` Davide Libenzi
2002-10-19 6:56 ` Mark Mielke
2002-10-19 16:10 ` Charles 'Buck' Krasic
2002-10-22 17:22 ` Mark Mielke
2002-10-22 17:46 ` Dan Kegel
2002-10-22 17:47 ` Davide Libenzi
2002-10-22 18:13 ` Alan Cox
2002-10-22 18:18 ` Davide Libenzi
2002-10-22 18:37 ` Benjamin LaHaise
2002-10-22 19:49 ` Davide Libenzi
2002-10-22 19:22 ` John Gardiner Myers
2002-10-22 19:28 ` Benjamin LaHaise
2002-10-22 19:50 ` John Gardiner Myers
2002-10-22 20:00 ` Benjamin LaHaise
2002-10-23 11:10 ` Latest aio code " Suparna Bhattacharya
2002-10-22 20:23 ` async poll John Myers
2002-10-22 18:42 ` epoll (was Re: [PATCH] async poll for 2.5) Charles 'Buck' Krasic
2002-10-22 19:35 ` Davide Libenzi
2002-10-23 16:49 ` Dan Kegel
2002-10-23 17:39 ` Benjamin LaHaise
2002-10-23 18:47 ` Davide Libenzi
2002-10-23 21:18 ` Benjamin LaHaise
2002-10-23 21:35 ` Davide Libenzi
2002-10-23 21:39 ` John Gardiner Myers
2002-10-23 21:54 ` Davide Libenzi
2002-10-23 17:49 ` Charles 'Buck' Krasic
2002-10-23 18:14 ` Davide Libenzi
2002-10-23 18:32 ` Charles 'Buck' Krasic
2002-10-23 20:36 ` async poll John Myers
2002-10-23 20:57 ` Dan Kegel
2002-10-23 21:13 ` Charles 'Buck' Krasic
2002-10-23 21:23 ` John Gardiner Myers
2002-10-23 21:51 ` Davide Libenzi
2002-10-23 21:51 ` bert hubert
2002-10-23 22:10 ` Davide Libenzi
2002-10-23 21:54 ` John Gardiner Myers
2002-10-23 22:22 ` Davide Libenzi
2002-10-23 22:29 ` John Gardiner Myers
2002-10-23 22:50 ` Davide Libenzi
2002-10-24 7:32 ` Eduardo Pérez
2002-10-24 15:05 ` Charles 'Buck' Krasic
2002-10-23 22:24 ` Dan Kegel
2002-10-23 22:30 ` Davide Libenzi
2002-10-23 22:53 ` Davide Libenzi
2002-10-19 17:19 ` epoll (was Re: [PATCH] async poll for 2.5) Davide Libenzi
2002-10-18 18:55 ` Chris Friesen
2002-10-18 19:00 ` Mark Mielke
2002-10-15 17:38 ` [PATCH] async poll for 2.5 Shailabh Nagar
2002-10-15 17:50 ` Benjamin LaHaise
2002-10-15 18:16 ` Davide Libenzi
2002-10-15 18:18 ` Shailabh Nagar
2002-10-15 19:00 ` Davide Libenzi
2002-10-15 19:02 ` Benjamin LaHaise
2002-10-15 18:59 ` Shailabh Nagar
2002-10-15 19:16 ` Davide Libenzi
2002-10-15 19:12 ` Benjamin LaHaise
2002-10-15 19:31 ` Davide Libenzi
2002-10-15 19:38 ` Dan Kegel
2002-10-15 19:55 ` Davide Libenzi
2002-10-15 20:36 ` John Gardiner Myers
2002-10-15 20:39 ` Benjamin LaHaise
2002-10-15 19:02 ` Davide Libenzi
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