All of lore.kernel.org
 help / color / mirror / Atom feed
From: Peter Lieven <pl@kamp.de>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Alexey Kardashevskiy <aik@ozlabs.ru>,
	"qemu-ppc@nongnu.org" <qemu-ppc@nongnu.org>,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
	David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [Qemu-devel] broken incoming migration
Date: Tue, 4 Jun 2013 21:15:20 +0200	[thread overview]
Message-ID: <E1D18498-EF65-470A-BAAF-BCE53866D314@kamp.de> (raw)
In-Reply-To: <51AE04ED.9030108@redhat.com>


Am 04.06.2013 um 17:17 schrieb Paolo Bonzini <pbonzini@redhat.com>:

> Il 04/06/2013 16:48, Peter Lieven ha scritto:
>> Still using 3.2, but strange enough the above example is also not
>> increasing RSS size for me.
>> 
>> Can you try the following:
>> qemu git master with 1G of memory (hanging in bios with no boot device)
>> and migrate it. Before migration RSS Size os somewhat
>> around 16MB. After migration its RSS size is in the order of 1G.
> 
> That may be a kernel bug.  The kernel did not do the copy-on-write trick
> on huge zero pages.  It was fixed last year, maybe 3.2 is not enough.
> Try adding a MADV_HUGEPAGE madvise to the testcase and see if it reproduces.

that's it. thanks for the pointer. the huge zero page was introduced in 3.8.

paolo, alexey: can you please verify the following works for you:
https://github.com/plieven/qemu/tree/fix-migration

thanks
peter


> 
> Paolo
> 

  reply	other threads:[~2013-06-04 19:15 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-30  7:44 [Qemu-devel] broken incoming migration Alexey Kardashevskiy
2013-05-30  7:49 ` Alexey Kardashevskiy
2013-05-30  7:49 ` Paolo Bonzini
2013-05-30  8:18   ` Alexey Kardashevskiy
2013-05-30  9:08     ` Peter Lieven
2013-05-30  9:31       ` Alexey Kardashevskiy
2013-05-30 13:00       ` Paolo Bonzini
2013-05-30 13:38         ` Alexey Kardashevskiy
2013-05-30 14:08           ` Paolo Bonzini
2013-05-30 14:38         ` Peter Lieven
2013-05-30 14:41           ` Paolo Bonzini
2013-06-04 13:52             ` Peter Lieven
2013-06-04 14:14               ` Paolo Bonzini
2013-06-04 14:38                 ` Peter Lieven
2013-06-04 14:40                   ` Paolo Bonzini
2013-06-04 14:48                     ` Peter Lieven
2013-06-04 15:17                       ` Paolo Bonzini
2013-06-04 19:15                         ` Peter Lieven [this message]
2013-06-05  3:37                           ` Alexey Kardashevskiy
2013-06-05  6:09                             ` Peter Lieven
2013-06-09  4:12                               ` liu ping fan
2013-06-09  7:22                                 ` Peter Lieven
2013-06-04 15:10                     ` Peter Lieven
2013-06-08  8:27                       ` Wenchao Xia
2013-06-08  8:30                         ` Alexey Kardashevskiy
2013-06-09  2:16                           ` Wenchao Xia
2013-06-09  2:34                             ` Alexey Kardashevskiy
2013-06-09  2:52                               ` [Qemu-devel] [Qemu-ppc] " Benjamin Herrenschmidt
2013-06-09  3:01                                 ` Alexey Kardashevskiy
2013-06-09  3:01                               ` [Qemu-devel] " Wenchao Xia
2013-06-09  3:09                                 ` Alexey Kardashevskiy
2013-06-09  3:31                                   ` Wenchao Xia
2013-06-09  7:27                                   ` Peter Lieven
2013-06-10  6:39                                     ` Alexey Kardashevskiy
2013-06-10  6:50                                       ` Peter Lieven
2013-06-10  6:55                                         ` Alexey Kardashevskiy
2013-06-10  8:44                                           ` Peter Lieven
2013-06-10  9:10                                             ` Alexey Kardashevskiy
2013-06-10  9:33                                               ` [Qemu-devel] [Qemu-ppc] " Benjamin Herrenschmidt
2013-06-10  9:42                                                 ` Peter Lieven
2013-06-09  2:53                             ` Benjamin Herrenschmidt
2013-06-12 14:00                               ` Paolo Bonzini
2013-06-12 14:11                                 ` Benjamin Herrenschmidt
2013-06-12 20:10                                   ` Paolo Bonzini
2013-06-13  2:41                                     ` Wenchao Xia
2013-06-03 10:04           ` [Qemu-devel] " Alexey Kardashevskiy
2013-06-04 10:56             ` Peter Lieven
2013-06-08  8:24         ` Wenchao Xia
2013-05-30 10:18 ` Peter Maydell

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=E1D18498-EF65-470A-BAAF-BCE53866D314@kamp.de \
    --to=pl@kamp.de \
    --cc=aik@ozlabs.ru \
    --cc=david@gibson.dropbear.id.au \
    --cc=pbonzini@redhat.com \
    --cc=qemu-devel@nongnu.org \
    --cc=qemu-ppc@nongnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.