From: Avi Kivity <avi@redhat.com>
To: "Richard W.M. Jones" <rjones@redhat.com>
Cc: Anthony Liguori <anthony@codemonkey.ws>,
Gleb Natapov <gleb@redhat.com>,
qemu-devel@nongnu.org, kvm@vger.kernel.org
Subject: Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?
Date: Wed, 04 Aug 2010 14:36:52 +0300 [thread overview]
Message-ID: <4C5950D4.90300@redhat.com> (raw)
In-Reply-To: <20100804113318.GE28523@amd.home.annexia.org>
On 08/04/2010 02:33 PM, Richard W.M. Jones wrote:
>
> I'm only allocating 500MB of RAM, so there's easily enough space to
> put a large ROM, with tons of room for growth (of both RAM and ROM).
> Yes, even real hardware has done this. The Weitek math copro mapped
> itself in at physical memory addresses c0000000 (a 32 MB window IIRC).
I'm sure it will work for your use case, but it becomes a feature that
only works if you have a guest with a small amount of memory and few pci
devices. With a larger guest it fails.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi@redhat.com>
To: "Richard W.M. Jones" <rjones@redhat.com>
Cc: kvm@vger.kernel.org, Gleb Natapov <gleb@redhat.com>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?
Date: Wed, 04 Aug 2010 14:36:52 +0300 [thread overview]
Message-ID: <4C5950D4.90300@redhat.com> (raw)
In-Reply-To: <20100804113318.GE28523@amd.home.annexia.org>
On 08/04/2010 02:33 PM, Richard W.M. Jones wrote:
>
> I'm only allocating 500MB of RAM, so there's easily enough space to
> put a large ROM, with tons of room for growth (of both RAM and ROM).
> Yes, even real hardware has done this. The Weitek math copro mapped
> itself in at physical memory addresses c0000000 (a 32 MB window IIRC).
I'm sure it will work for your use case, but it becomes a feature that
only works if you have a guest with a small amount of memory and few pci
devices. With a larger guest it fails.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
next prev parent reply other threads:[~2010-08-04 11:37 UTC|newest]
Thread overview: 285+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-03 11:13 [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35? Richard W.M. Jones
2010-08-03 11:33 ` Gleb Natapov
2010-08-03 12:10 ` Richard W.M. Jones
2010-08-03 12:37 ` Gleb Natapov
2010-08-03 12:48 ` Richard W.M. Jones
2010-08-03 13:19 ` Avi Kivity
2010-08-03 13:19 ` Avi Kivity
2010-08-03 14:05 ` Richard W.M. Jones
2010-08-03 14:38 ` Avi Kivity
2010-08-03 14:53 ` Richard W.M. Jones
2010-08-03 16:10 ` Avi Kivity
2010-08-03 16:28 ` Richard W.M. Jones
2010-08-03 16:44 ` Avi Kivity
2010-08-03 16:46 ` Anthony Liguori
2010-08-03 16:46 ` Anthony Liguori
2010-08-03 16:50 ` Avi Kivity
2010-08-03 16:50 ` Avi Kivity
2010-08-03 16:53 ` Anthony Liguori
2010-08-03 16:53 ` Anthony Liguori
2010-08-03 17:01 ` Avi Kivity
2010-08-03 17:01 ` Avi Kivity
2010-08-03 17:42 ` Anthony Liguori
2010-08-03 17:42 ` Anthony Liguori
2010-08-03 17:58 ` Avi Kivity
2010-08-03 17:58 ` Avi Kivity
2010-08-03 18:11 ` Richard W.M. Jones
2010-08-03 18:11 ` Richard W.M. Jones
2010-08-03 18:26 ` Anthony Liguori
2010-08-03 18:26 ` Anthony Liguori
2010-08-03 18:43 ` Avi Kivity
2010-08-03 18:43 ` Avi Kivity
2010-08-03 18:47 ` Avi Kivity
2010-08-03 18:47 ` Avi Kivity
2010-08-03 18:55 ` Anthony Liguori
2010-08-03 18:55 ` Anthony Liguori
2010-08-03 19:00 ` Avi Kivity
2010-08-03 19:00 ` Avi Kivity
2010-08-03 19:05 ` Gleb Natapov
2010-08-03 19:05 ` Gleb Natapov
2010-08-03 19:09 ` Avi Kivity
2010-08-03 19:09 ` Avi Kivity
2010-08-03 19:15 ` Anthony Liguori
2010-08-03 19:15 ` Anthony Liguori
2010-08-03 19:24 ` Avi Kivity
2010-08-03 19:24 ` Avi Kivity
2010-08-03 19:38 ` Anthony Liguori
2010-08-03 19:38 ` Anthony Liguori
2010-08-03 19:41 ` Avi Kivity
2010-08-03 19:41 ` Avi Kivity
2010-08-03 19:47 ` Anthony Liguori
2010-08-03 19:47 ` Anthony Liguori
2010-08-04 5:47 ` Avi Kivity
2010-08-04 5:47 ` Avi Kivity
2010-08-03 21:24 ` Gerd Hoffmann
2010-08-03 21:24 ` Gerd Hoffmann
2010-08-03 21:20 ` Gerd Hoffmann
2010-08-03 21:20 ` Gerd Hoffmann
2010-08-04 5:53 ` Avi Kivity
2010-08-04 5:53 ` Avi Kivity
2010-08-04 7:56 ` Gerd Hoffmann
2010-08-04 7:56 ` Gerd Hoffmann
2010-08-04 8:17 ` Avi Kivity
2010-08-04 8:17 ` Avi Kivity
2010-08-04 8:43 ` Gleb Natapov
2010-08-04 8:43 ` Gleb Natapov
2010-08-04 9:22 ` Gerd Hoffmann
2010-08-04 9:22 ` Gerd Hoffmann
2010-08-04 13:04 ` Anthony Liguori
2010-08-04 13:04 ` Anthony Liguori
2010-08-04 13:07 ` Gleb Natapov
2010-08-04 13:07 ` Gleb Natapov
2010-08-04 13:15 ` Anthony Liguori
2010-08-04 13:15 ` Anthony Liguori
2010-08-04 13:24 ` Richard W.M. Jones
2010-08-04 13:24 ` Richard W.M. Jones
2010-08-04 13:26 ` Gleb Natapov
2010-08-04 13:26 ` Gleb Natapov
2010-08-04 14:22 ` Anthony Liguori
2010-08-04 14:22 ` Anthony Liguori
2010-08-04 14:38 ` Gleb Natapov
2010-08-04 14:38 ` Gleb Natapov
2010-08-04 14:50 ` Anthony Liguori
2010-08-04 14:50 ` Anthony Liguori
2010-08-04 15:01 ` Gleb Natapov
2010-08-04 15:01 ` Gleb Natapov
2010-08-04 15:07 ` Anthony Liguori
2010-08-04 15:07 ` Anthony Liguori
2010-08-04 15:15 ` Gleb Natapov
2010-08-04 15:15 ` Gleb Natapov
2010-08-04 22:41 ` Kevin O'Connor
2010-08-04 22:41 ` Kevin O'Connor
2010-08-04 16:26 ` Avi Kivity
2010-08-04 16:26 ` Avi Kivity
2010-08-04 13:34 ` Gleb Natapov
2010-08-04 13:34 ` Gleb Natapov
2010-08-04 13:52 ` Anthony Liguori
2010-08-04 13:52 ` [Qemu-devel] " Anthony Liguori
2010-08-04 14:00 ` Gleb Natapov
2010-08-04 14:00 ` Gleb Natapov
2010-08-04 14:14 ` Anthony Liguori
2010-08-04 14:14 ` Anthony Liguori
2010-08-04 14:36 ` Gleb Natapov
2010-08-04 14:36 ` Gleb Natapov
2010-08-04 14:22 ` Paolo Bonzini
2010-08-04 14:22 ` Paolo Bonzini
2010-08-04 14:39 ` Anthony Liguori
2010-08-04 14:39 ` Anthony Liguori
2010-08-04 16:33 ` Avi Kivity
2010-08-04 16:33 ` Avi Kivity
2010-08-04 16:30 ` Avi Kivity
2010-08-04 16:30 ` Avi Kivity
2010-08-04 16:36 ` Avi Kivity
2010-08-04 16:36 ` Avi Kivity
2010-08-04 16:44 ` Anthony Liguori
2010-08-04 16:44 ` Anthony Liguori
2010-08-04 16:52 ` Avi Kivity
2010-08-04 16:52 ` Avi Kivity
2010-08-04 17:37 ` Gleb Natapov
2010-08-04 17:37 ` Gleb Natapov
2010-08-05 7:28 ` Gerd Hoffmann
2010-08-05 7:28 ` Gerd Hoffmann
2010-08-05 7:34 ` Gleb Natapov
2010-08-05 7:34 ` Gleb Natapov
2010-08-05 7:56 ` Avi Kivity
2010-08-05 7:56 ` Avi Kivity
2010-08-05 7:59 ` Gleb Natapov
2010-08-05 7:59 ` Gleb Natapov
2010-08-05 8:45 ` Avi Kivity
2010-08-05 8:45 ` Avi Kivity
2010-08-05 8:48 ` Gleb Natapov
2010-08-05 8:48 ` Gleb Natapov
2010-08-05 13:43 ` Anthony Liguori
2010-08-05 13:43 ` Anthony Liguori
2010-08-04 16:45 ` Alexander Graf
2010-08-04 16:45 ` Alexander Graf
2010-08-04 16:54 ` Avi Kivity
2010-08-04 16:54 ` Avi Kivity
2010-08-04 17:01 ` Alexander Graf
2010-08-04 17:01 ` Alexander Graf
2010-08-04 17:14 ` Avi Kivity
2010-08-04 17:14 ` Avi Kivity
2010-08-04 17:27 ` Alexander Graf
2010-08-04 17:27 ` Alexander Graf
2010-08-04 17:34 ` Avi Kivity
2010-08-04 17:34 ` Avi Kivity
2010-08-04 20:06 ` David S. Ahern
2010-08-04 20:06 ` David S. Ahern
2010-08-04 20:16 ` Richard W.M. Jones
2010-08-04 20:16 ` Richard W.M. Jones
2010-08-05 2:38 ` Avi Kivity
2010-08-05 2:38 ` Avi Kivity
2010-08-04 17:26 ` Anthony Liguori
2010-08-04 17:26 ` Anthony Liguori
2010-08-04 17:31 ` Alexander Graf
2010-08-04 17:31 ` Alexander Graf
2010-08-04 17:35 ` Avi Kivity
2010-08-04 17:35 ` Avi Kivity
2010-08-04 17:36 ` Anthony Liguori
2010-08-04 17:36 ` Anthony Liguori
2010-08-04 17:36 ` Alexander Graf
2010-08-04 17:36 ` Alexander Graf
2010-08-04 17:46 ` Richard W.M. Jones
2010-08-04 17:46 ` Richard W.M. Jones
2010-08-04 17:50 ` Avi Kivity
2010-08-04 17:50 ` Avi Kivity
2010-08-04 18:13 ` Alexander Graf
2010-08-04 18:13 ` [Qemu-devel] " Alexander Graf
2010-08-04 18:16 ` Anthony Liguori
2010-08-04 18:16 ` Anthony Liguori
2010-08-04 18:18 ` Alexander Graf
2010-08-04 18:18 ` Alexander Graf
2010-08-04 18:19 ` Avi Kivity
2010-08-04 18:19 ` Avi Kivity
2010-08-04 18:18 ` Avi Kivity
2010-08-04 18:18 ` Avi Kivity
2010-08-04 16:42 ` Anthony Liguori
2010-08-04 16:42 ` Anthony Liguori
2010-08-04 13:22 ` Richard W.M. Jones
2010-08-04 13:22 ` Richard W.M. Jones
2010-08-04 13:29 ` Gleb Natapov
2010-08-04 13:29 ` Gleb Natapov
2010-08-04 16:25 ` Avi Kivity
2010-08-04 16:25 ` Avi Kivity
2010-08-03 22:06 ` Richard W.M. Jones
2010-08-03 22:06 ` Richard W.M. Jones
2010-08-04 5:54 ` Avi Kivity
2010-08-04 5:54 ` Avi Kivity
2010-08-04 9:24 ` Richard W.M. Jones
2010-08-04 9:24 ` Richard W.M. Jones
2010-08-04 9:27 ` Gleb Natapov
2010-08-04 9:27 ` Gleb Natapov
2010-08-04 9:52 ` Avi Kivity
2010-08-04 9:52 ` Avi Kivity
2010-08-04 11:33 ` Richard W.M. Jones
2010-08-04 11:33 ` Richard W.M. Jones
2010-08-04 11:36 ` Avi Kivity [this message]
2010-08-04 11:36 ` Avi Kivity
2010-08-04 12:07 ` Gleb Natapov
2010-08-04 12:07 ` Gleb Natapov
2010-08-04 12:59 ` Anthony Liguori
2010-08-04 12:59 ` Anthony Liguori
2010-08-03 19:26 ` Gleb Natapov
2010-08-03 19:26 ` Gleb Natapov
2010-08-03 19:13 ` Richard W.M. Jones
2010-08-03 19:13 ` Richard W.M. Jones
2010-08-03 19:17 ` Gleb Natapov
2010-08-03 19:17 ` Gleb Natapov
2010-08-03 19:19 ` Anthony Liguori
2010-08-03 19:19 ` Anthony Liguori
2010-08-03 19:22 ` Avi Kivity
2010-08-03 19:22 ` Avi Kivity
2010-08-03 20:00 ` Richard W.M. Jones
2010-08-03 20:00 ` Richard W.M. Jones
2010-08-03 20:49 ` Anthony Liguori
2010-08-03 20:49 ` Anthony Liguori
2010-08-03 21:13 ` Paolo Bonzini
2010-08-03 21:13 ` Paolo Bonzini
2010-08-03 21:34 ` Anthony Liguori
2010-08-03 21:34 ` Anthony Liguori
2010-08-04 7:57 ` Paolo Bonzini
2010-08-04 7:57 ` Paolo Bonzini
2010-08-04 8:19 ` Avi Kivity
2010-08-04 8:19 ` Avi Kivity
2010-08-04 12:53 ` Anthony Liguori
2010-08-04 12:53 ` Anthony Liguori
2010-08-04 16:44 ` Avi Kivity
2010-08-04 16:44 ` Avi Kivity
2010-08-04 16:46 ` Anthony Liguori
2010-08-04 16:46 ` Anthony Liguori
2010-08-04 16:48 ` Alexander Graf
2010-08-04 16:48 ` Alexander Graf
2010-08-04 16:49 ` Anthony Liguori
2010-08-04 16:49 ` Anthony Liguori
2010-08-04 16:51 ` Alexander Graf
2010-08-04 16:51 ` Alexander Graf
2010-08-04 17:01 ` Paolo Bonzini
2010-08-04 17:01 ` Paolo Bonzini
2010-08-04 17:19 ` Avi Kivity
2010-08-04 17:19 ` Avi Kivity
2010-08-04 17:25 ` Alexander Graf
2010-08-04 17:25 ` Alexander Graf
2010-08-04 17:27 ` Anthony Liguori
2010-08-04 17:27 ` Anthony Liguori
2010-08-04 17:37 ` Avi Kivity
2010-08-04 17:37 ` Avi Kivity
2010-08-04 17:53 ` Anthony Liguori
2010-08-04 17:53 ` Anthony Liguori
2010-08-04 18:05 ` Alexander Graf
2010-08-04 18:05 ` Alexander Graf
2010-08-04 5:56 ` Avi Kivity
2010-08-04 5:56 ` Avi Kivity
2010-08-04 1:17 ` Jamie Lokier
2010-08-04 1:17 ` Jamie Lokier
2010-08-04 8:21 ` Avi Kivity
2010-08-04 8:21 ` Avi Kivity
2010-08-04 14:51 ` David S. Ahern
2010-08-04 14:51 ` David S. Ahern
2010-08-04 14:57 ` Anthony Liguori
2010-08-04 14:57 ` Anthony Liguori
2010-08-04 15:25 ` Gleb Natapov
2010-08-04 15:25 ` Gleb Natapov
2010-08-04 15:31 ` Alexander Graf
2010-08-04 15:31 ` Alexander Graf
2010-08-04 15:48 ` Gleb Natapov
2010-08-04 15:48 ` Gleb Natapov
2010-08-04 15:59 ` Alexander Graf
2010-08-04 15:59 ` Alexander Graf
2010-08-04 16:08 ` Gleb Natapov
2010-08-04 16:08 ` Gleb Natapov
2010-08-04 16:48 ` Avi Kivity
2010-08-04 16:48 ` Avi Kivity
2010-08-04 23:17 ` Kevin O'Connor
2010-08-04 23:17 ` Kevin O'Connor
2010-08-05 5:26 ` Gleb Natapov
2010-08-05 5:26 ` Gleb Natapov
2010-08-03 16:56 ` Anthony Liguori
2010-08-03 16:56 ` Anthony Liguori
2010-08-03 16:48 ` Avi Kivity
2010-08-03 17:00 ` Richard W.M. Jones
2010-08-03 17:05 ` Avi Kivity
2010-08-03 16:56 ` Richard W.M. Jones
2010-08-03 17:08 ` Avi Kivity
2010-08-03 16:39 ` Anthony Liguori
2010-08-03 16:39 ` Anthony Liguori
2010-08-03 16:43 ` Richard W.M. Jones
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