From: Laszlo Ersek <lersek@redhat.com>
To: Jun Koi <junkoi2004@gmail.com>, Greg Kurz <gkurz@linux.vnet.ibm.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] dump-guest-memory command?
Date: Fri, 16 May 2014 13:30:32 +0200 [thread overview]
Message-ID: <5375F6D8.3080006@redhat.com> (raw)
In-Reply-To: <CA+g7VZ3GpK494RaqhxfwCU+WqbG8RZ=UPG1FOA79BhtrSO7jow@mail.gmail.com>
On 05/16/14 11:59, Jun Koi wrote:
> - is it true that dump-guest-memory just write down physical memory
> page, and does not consider the virtual-memory concept?
No, it isn't.
Basically, "dump-guest-memory" supports two modes of operation, "paging
enabled" and "paging disabled".
Many (most?) people dump for the "crash" utility, which is super smart,
and extra paging info is not needed. For "crash" we just dump the
guest-phys memory ranges the way the guest sees them, and that's it;
"crash" figures out everything from that.
If you want to use "gdb" rather than "crash", or need the guest-virtual
addresses in the ELF vmcore for some other reason, then you should
invoke "dump-guest-memory" with paging enabled.
Enter "help dump-guest-memory" at the qemu monitor prompt, and look for
the "-p" option.
Laszlo
next prev parent reply other threads:[~2014-05-16 12:12 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-16 6:24 [Qemu-devel] dump-guest-memory command? Jun Koi
2014-05-16 7:03 ` Greg Kurz
2014-05-16 8:40 ` Jun Koi
2014-05-16 8:45 ` Andreas Färber
2014-05-16 8:51 ` Jun Koi
2014-05-16 10:00 ` Greg Kurz
2014-05-16 9:51 ` Greg Kurz
2014-05-16 9:59 ` Jun Koi
2014-05-16 10:15 ` Greg Kurz
2014-05-16 11:30 ` Laszlo Ersek [this message]
2014-05-16 13:01 ` Jun Koi
2014-05-16 15:38 ` Laszlo Ersek
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