From: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
To: Andrew Morton <akpm@osdl.org>
Cc: lkml <linux-kernel@vger.kernel.org>,
David Miller <davem@davemloft.net>,
Ulrich Drepper <drepper@redhat.com>,
netdev <netdev@vger.kernel.org>,
Zach Brown <zach.brown@oracle.com>
Subject: Re: [take6 1/3] kevent: Core files.
Date: Thu, 10 Aug 2006 12:22:35 +0400 [thread overview]
Message-ID: <20060810082235.GA21025@2ka.mipt.ru> (raw)
In-Reply-To: <20060810010254.3b52682f.akpm@osdl.org>
On Thu, Aug 10, 2006 at 01:02:54AM -0700, Andrew Morton (akpm@osdl.org) wrote:
> > > Afaict this mmap function gives a user a free way of getting pinned memory.
> > > What is the upper bound on the amount of memory which a user can thus
> > > obtain?
> >
> > it is limited by maximum queue length which is 4k entries right now, so
> > maximum number of paged here is 4k*40/page_size, i.e. about 40 pages on
> > x86.
>
> Is that per user or per fd? If the latter that is, with the usual
> RLIMIT_NOFILE, 160MBytes. 2GB with 64k pagesize. Problem ;)
Per kevent fd.
I have some ideas about better mmap ring implementation, which would
dinamically grow it's buffer when events are added and reuse the same
place for next events, but there are some nitpics unresolved yet.
Let's not see there in next releases (no merge of course), until better
solution is ready. I will change that area when other things are ready.
--
Evgeniy Polyakov
next prev parent reply other threads:[~2006-08-10 8:23 UTC|newest]
Thread overview: 180+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-09 13:24 [RFC 1/4] kevent: core files Evgeniy Polyakov
2006-07-09 14:59 ` Pekka Enberg
2006-07-09 15:08 ` Evgeniy Polyakov
2006-07-25 6:17 ` David Miller
2006-07-25 6:26 ` Evgeniy Polyakov
2006-07-27 19:18 ` Zach Brown
2006-07-27 20:06 ` Evgeniy Polyakov
2006-07-27 21:32 ` Zach Brown
2006-07-28 5:23 ` Evgeniy Polyakov
2006-07-28 18:33 ` Zach Brown
2006-07-28 18:44 ` Evgeniy Polyakov
2006-07-28 19:10 ` Zach Brown
2006-07-29 3:38 ` Ulrich Drepper
2006-07-29 4:32 ` Nicholas Miell
2006-07-29 15:48 ` Evgeniy Polyakov
2006-07-29 20:54 ` Nicholas Miell
2006-07-30 8:08 ` Ulrich Drepper
2006-07-29 15:44 ` Evgeniy Polyakov
2006-07-29 16:18 ` Ulrich Drepper
2006-07-29 16:36 ` Hans Henrik Happe
2006-07-31 10:33 ` Evgeniy Polyakov
2006-07-31 10:35 ` Herbert Xu
2006-07-31 10:50 ` Evgeniy Polyakov
2006-07-31 10:57 ` David Miller
2006-07-31 10:59 ` Herbert Xu
2006-08-01 7:53 ` Ulrich Drepper
2006-08-01 7:58 ` David Miller
2006-07-31 19:41 ` Evgeniy Polyakov
2006-07-31 22:00 ` David Miller
2006-07-31 22:16 ` Brent Cook
2006-07-31 22:20 ` David Miller
2006-08-01 6:24 ` Evgeniy Polyakov
2006-07-31 22:46 ` Zach Brown
2006-08-01 9:34 ` [take2 0/4] kevent: introduction Evgeniy Polyakov
2006-08-01 9:34 ` [take2 1/4] kevent: core files Evgeniy Polyakov
2006-08-01 9:34 ` [take2 2/4] kevent: network AIO, socket notifications Evgeniy Polyakov
2006-08-01 9:34 ` [take2 4/4] kevent: poll/select() notifications. Timer notifications Evgeniy Polyakov
2006-08-01 9:34 ` [take2 3/4] kevent: AIO, aio_sendfile() implementation Evgeniy Polyakov
2006-08-01 13:46 ` [take2 1/4] kevent: core files James Morris
2006-08-01 13:55 ` Evgeniy Polyakov
2006-08-01 14:27 ` James Morris
2006-08-01 14:34 ` Evgeniy Polyakov
2006-08-01 23:56 ` Zach Brown
2006-08-02 0:01 ` David Miller
2006-08-02 6:43 ` Evgeniy Polyakov
2006-08-02 6:39 ` Evgeniy Polyakov
2006-08-02 7:25 ` David Miller
2006-08-02 7:46 ` Evgeniy Polyakov
2006-08-03 9:45 ` [take3 0/4] kevent: Generic event handling mechanism Evgeniy Polyakov
2006-08-03 9:40 ` Evgeniy Polyakov
2006-08-03 9:46 ` [take3 1/4] kevent: Core files Evgeniy Polyakov
2006-08-03 9:46 ` [take3 2/4] kevent: AIO, aio_sendfile() implementation Evgeniy Polyakov
2006-08-03 9:46 ` [take3 3/4] kevent: Network AIO, socket notifications Evgeniy Polyakov
2006-08-03 9:46 ` [take3 4/4] kevent: poll/select() notifications. Timer notifications Evgeniy Polyakov
2006-08-03 9:43 ` Eric Dumazet
2006-08-03 9:48 ` Evgeniy Polyakov
2006-08-03 9:54 ` [take3 3/4] kevent: Network AIO, socket notifications Eric Dumazet
2006-08-03 10:13 ` Evgeniy Polyakov
2006-08-03 17:04 ` [take3 2/4] kevent: AIO, aio_sendfile() implementation Badari Pulavarty
2006-08-03 17:13 ` Evgeniy Polyakov
2006-08-03 14:40 ` [take3 1/4] kevent: Core files Eric Dumazet
2006-08-03 14:55 ` Evgeniy Polyakov
2006-08-03 15:11 ` Eric Dumazet
2006-08-03 15:21 ` Evgeniy Polyakov
2006-08-03 21:37 ` David Miller
2006-08-05 13:02 ` [take4 0/4] kevent: Generic event handling mechanism Evgeniy Polyakov
2006-08-05 13:02 ` [take4 1/4] kevent: Core files Evgeniy Polyakov
2006-08-05 13:02 ` [take4 2/4] kevent: AIO, aio_sendfile() implementation Evgeniy Polyakov
2006-08-05 13:02 ` [take4 3/4] kevent: Network AIO, socket notifications Evgeniy Polyakov
2006-08-05 13:02 ` [take4 4/4] kevent: poll/select() notifications. Timer notifications Evgeniy Polyakov
2006-08-05 17:57 ` [take4 1/4] kevent: Core files Greg KH
2006-08-05 18:10 ` Evgeniy Polyakov
2006-08-08 7:44 ` [take5 0/4] kevent: Generic event handling mechanism Evgeniy Polyakov
2006-08-08 7:44 ` [take5 1/4] kevent: Core files Evgeniy Polyakov
2006-08-08 7:44 ` [take5 2/4] kevent: AIO, aio_sendfile() implementation Evgeniy Polyakov
2006-08-08 7:44 ` [take5 3/4] kevent: Network AIO, socket notifications Evgeniy Polyakov
2006-08-08 7:44 ` [take5 4/4] kevent: poll/select() notifications. Timer notifications Evgeniy Polyakov
2006-08-08 9:52 ` [take5 3/4] kevent: Network AIO, socket notifications Eric Dumazet
2006-08-08 10:02 ` Evgeniy Polyakov
2006-08-08 22:02 ` [take5 1/4] kevent: Core files Zach Brown
2006-08-09 5:22 ` Evgeniy Polyakov
2006-08-08 21:32 ` [take5 0/4] kevent: Generic event handling mechanism Zach Brown
2006-08-09 5:31 ` Evgeniy Polyakov
2006-08-09 5:52 ` David Miller
2006-08-09 6:11 ` Evgeniy Polyakov
2006-08-09 6:25 ` Evgeniy Polyakov
2006-08-09 6:31 ` David Miller
2006-08-09 6:49 ` Evgeniy Polyakov
2006-08-09 6:57 ` Ulrich Drepper
2006-08-09 7:00 ` David Miller
2006-08-09 7:00 ` Evgeniy Polyakov
2006-08-09 8:34 ` Christoph Hellwig
2006-08-09 8:45 ` Andrew Morton
2006-08-09 8:02 ` [take6 0/3] " Evgeniy Polyakov
2006-08-09 7:58 ` David Miller
2006-08-09 8:07 ` Evgeniy Polyakov
2006-08-09 8:20 ` David Miller
2006-08-09 8:24 ` Evgeniy Polyakov
2006-08-09 8:02 ` [take6 1/3] kevent: Core files Evgeniy Polyakov
2006-08-09 8:02 ` [take6 3/3] kevent: Network AIO, socket notifications Evgeniy Polyakov
2006-08-09 8:02 ` [take6 2/3] kevent: poll/select() notifications. Timer notifications Evgeniy Polyakov
2006-08-09 17:47 ` [take6 1/3] kevent: Core files Stephen Hemminger
2006-08-09 19:17 ` Evgeniy Polyakov
2006-08-10 0:04 ` David Miller
2006-08-09 22:21 ` Andrew Morton
2006-08-10 6:14 ` Evgeniy Polyakov
2006-08-10 6:42 ` David Miller
2006-08-10 6:48 ` Evgeniy Polyakov
2006-08-10 7:18 ` Andrew Morton
2006-08-10 7:50 ` Evgeniy Polyakov
2006-08-10 8:02 ` Andrew Morton
2006-08-10 8:22 ` Evgeniy Polyakov [this message]
2006-08-11 0:56 ` Andrew Morton
2006-08-11 6:15 ` Evgeniy Polyakov
2006-08-11 6:23 ` Andrew Morton
2006-08-11 6:30 ` Evgeniy Polyakov
2006-08-11 7:04 ` Andrew Morton
2006-08-11 7:27 ` Evgeniy Polyakov
2006-08-11 6:25 ` Ulrich Drepper
2006-08-11 6:33 ` Evgeniy Polyakov
2006-08-11 6:38 ` David Miller
2006-08-11 6:55 ` Evgeniy Polyakov
2006-08-10 12:12 ` [take7 0/1] kevent: generic event handling mechanism Evgeniy Polyakov
2006-08-10 12:16 ` [take7 1/1] kevent: core files and timer/poll notifications Evgeniy Polyakov
2006-08-10 12:22 ` Evgeniy Polyakov
2006-08-11 8:40 ` [take8 0/2] kevent: Generic event handling mechanism Evgeniy Polyakov
2006-08-11 8:40 ` [take8 1/2] kevent: Core files Evgeniy Polyakov
2006-08-11 8:40 ` [take8 2/2] kevent: poll/select() notifications. Timer notifications Evgeniy Polyakov
2006-08-11 15:45 ` Andrew Morton
2006-08-12 8:18 ` Evgeniy Polyakov
2006-08-12 8:38 ` Andrew Morton
2006-08-12 8:55 ` Evgeniy Polyakov
2006-08-13 0:51 ` [take8 1/2] kevent: Core files Jeff Carr
2006-08-13 9:04 ` Evgeniy Polyakov
2006-08-14 6:20 ` [take8 0/2] kevent: Generic event handling mechanism Evgeniy Polyakov
2006-08-14 6:20 ` [take8 1/2] kevent: Core files Evgeniy Polyakov
2006-08-14 6:20 ` [take8 2/2] kevent: poll/select() notifications. Timer notifications Evgeniy Polyakov
2006-08-14 6:21 ` [take9 0/2] kevent: Generic event handling mechanism Evgeniy Polyakov
2006-08-14 6:21 ` [take9 1/2] kevent: Core files Evgeniy Polyakov
2006-08-14 6:21 ` [take9 2/2] kevent: poll/select() notifications. Timer notifications Evgeniy Polyakov
2006-08-16 13:30 ` Christoph Hellwig
2006-08-16 13:40 ` Evgeniy Polyakov
2006-08-18 10:41 ` Christoph Hellwig
2006-08-18 10:59 ` Evgeniy Polyakov
2006-08-21 11:01 ` Christoph Hellwig
2006-08-21 11:26 ` Evgeniy Polyakov
2006-08-22 14:35 ` Davide Libenzi
2006-08-16 13:45 ` [take9 1/2] kevent: Core files Christoph Hellwig
2006-08-16 13:56 ` Evgeniy Polyakov
2006-08-16 18:08 ` Zach Brown
2006-08-16 19:24 ` Evgeniy Polyakov
2006-08-16 19:45 ` David Miller
2006-08-16 20:06 ` Evgeniy Polyakov
2006-08-18 10:46 ` Christoph Hellwig
2006-08-18 11:23 ` Evgeniy Polyakov
2006-08-21 10:56 ` Christoph Hellwig
2006-08-21 11:13 ` Evgeniy Polyakov
2006-08-21 12:53 ` Bernd Petrovitsch
2006-08-21 13:01 ` Evgeniy Polyakov
2006-08-21 13:49 ` Bernd Petrovitsch
2006-08-21 19:09 ` David Miller
2006-08-16 13:26 ` [take9 0/2] kevent: Generic event handling mechanism Christoph Hellwig
2006-08-16 13:38 ` Evgeniy Polyakov
2006-08-16 18:10 ` Zach Brown
2006-08-16 12:34 ` [take10 " Evgeniy Polyakov
2006-08-16 12:34 ` [take10 1/2] kevent: Core files Evgeniy Polyakov
2006-08-16 12:34 ` [take10 2/2] kevent: poll/select() notifications. Timer notifications Evgeniy Polyakov
2006-08-18 9:35 ` [take10 1/2] kevent: Core files Joe Jin
2006-08-18 10:10 ` Evgeniy Polyakov
2006-08-01 1:05 ` [RFC 1/4] kevent: core files David Miller
2006-07-27 20:58 ` Benjamin LaHaise
2006-07-27 21:44 ` Zach Brown
2006-07-27 22:02 ` Benjamin LaHaise
2006-07-28 5:39 ` Evgeniy Polyakov
2006-07-28 19:01 ` Zach Brown
2006-07-28 19:24 ` Evgeniy Polyakov
2006-07-28 19:34 ` Zach Brown
2006-07-28 19:37 ` Zach Brown
2006-08-01 1:02 ` David Miller
2006-08-01 17:02 ` Zach Brown
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