Hi Thomas, thanks for the triage. I'm a few years past working on this
project directly so if it's not affecting anyone else I'd probably just
close this bug.
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Public bug reported:
As originally found at http://www.mail-
archive.com/k...@vger.kernel.org/msg08745.html from 3 years ago!
Basically qemu seizes up in the event that the file descriptor for its
emulated serial port has a full buffer, i.e. write() returns EAGAIN.
For me, this happened when the
This patch to SeaBIOS seems to fix it, but I still think there's a bug
in kvm if it behaves differently with or without the "-no-kvm" flag.
** Tags added: bios kvm reset
** Patch added: "qemu-reset.patch"
https://bugs.launchpad.net/qemu/+bug/732155/+attachment/1906859/+files/qemu-reset.patch
A bit of bisection on SeaBIOS shows that commit
244caf86f11f5f65d166d91704f64cb673167abc was the first to exhibit this
behaviour. Arguably a SeaBIOS bug, but I don't know enough about the
reset process to judge.
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Public bug reported:
I've built qemu-kvm and seabios from the latest git sources, and found
that the system_reset monitor command causes a freeze if I start qemu-
system-x86_64 with the -no-kvm flag. This is a serial log from an
attempt at rebooting:
$ ./x86_64-softmmu/qemu-system-x86_64 -monito
** Patch added: "Fix loading of BIOS file over 9p/network filesystems"
https://bugs.launchpad.net/bugs/714629/+attachment/1836057/+files/rom_read.patch
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Public bug reported:
When qemu is running over a 9p filesystem (e.g. when running underneath
-virtfs of another qemu), and probably some other network filesystems,
it fails to read its BIOS image. This is because it uses a single low-
level read() call on the bios.bin, asking for the full file.
