From: John Snow <670769@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [Bug 670769] Re: CDROM size not updated when changing image files
Date: Wed, 31 Aug 2016 18:42:58 -0000 [thread overview]
Message-ID: <20160831184300.13126.78218.launchpad@soybean.canonical.com> (raw)
In-Reply-To: 20101104050832.8354.57127.malonedeb@potassium.ubuntu.com
** Changed in: qemu
Assignee: (unassigned) => John Snow (jnsnow)
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https://bugs.launchpad.net/bugs/670769
Title:
CDROM size not updated when changing image files
Status in QEMU:
New
Bug description:
I'm using qemu 13.0 with a plain Linux kernel using the ata_piix driver as the guest, and an initrd that starts a shell. When changing the image in the monitor and reading from the CDROM in the guest, the size is not updated. I'm using LInux 2.6.32.24
as the host and I've tested 2.6.32.24, 2.6.35, and 2.6.36 as guests. Both host and guest are 64-bit. Here is the command used to start the guest using the initrd:
./x86_64-softmmu/qemu-system-x86_64 -cdrom /spare2/cd1.img -kernel
/sources/linux-2.6.32.24-test/arch/x86/boot/bzImage -initrd
/spare2/initrd.img -append 'root=/dev/ram0 rw' -cpu core2duo
Additional info on this bug can be found here: http://marc.info/?l=kvm&m=128746013906820&w=2. Note: this is how I discovered
the bug, using 32-bit Slackware install CDs.
I'm attaching the initrd I used in my tests: I created two different-sized fake CDROM images by dd'ing from /dev/zero. In my tests,
cd1.img is smaller that cd2.img. In the monitor I executed 'change ide1-cd0 /spare2/cd2.img' to load the new image. I checked
the size by cat'ing /sys/block/sr0/size in the guest after reading the CDROM. Reading the CDROM was done by typing
'dd if=/dev/sr0 of=/dev/null bs=512 count=3'
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next prev parent reply other threads:[~2016-08-31 18:51 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-04 5:08 [Qemu-devel] [Bug 670769] [NEW] CDROM size not updated when changing image files Alex Davis
2010-11-04 5:08 ` [Qemu-devel] [Bug 670769] " Alex Davis
2010-11-10 3:17 ` Alex Davis
2010-11-10 3:47 ` agraf
2010-11-10 12:55 ` Alex Davis
2010-11-10 13:11 ` agraf
2011-01-03 14:58 ` Alex Davis
2016-08-31 18:42 ` John Snow [this message]
2020-11-12 8:57 ` Thomas Huth
2021-01-12 4:17 ` Launchpad Bug Tracker
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