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[Qemu-devel] "Issue" With non-blocking IO patch
From: |
Brad Campbell |
Subject: |
[Qemu-devel] "Issue" With non-blocking IO patch |
Date: |
Mon, 17 Oct 2005 15:52:59 +0400 |
User-agent: |
Mozilla Thunderbird 1.0+ (X11/20050712) |
G'day all,
Have discovered a minor hitch with the non-blocking IO patch.
when changing cdrom devices in the console it dies with
qemu: /home/brad/src/qemu/block.c:425: bdrv_cancel_nonblock_io: Assertion `nbst->state ==
STATE_READ_DONE' failed.
Aborted
I start qemu with qemu -hda test.img -cdrom test.iso
ctrl-alt 2 to change to virtual console
issue a "change cdrom /dev/sr0"
and the above happens. It does not seem to matter from<->to what I am changing
the device.
I'm using a latest CVS version with the dma/nonblocking IO patch added only.
Other than that, it seems to tick along quite fine. I have been using it for days on end now and the
other bonus the non-blocking patch seems to have is qemu when running windows seems to keep better
time. Prior to this patch the clock drift was horrid. I had to install an ntp daemon in windows to
keep it synced to the host, now it's nowhere near as bad.
It would also appear that the non-blocking patch helps the "stalling" problem, where long installs
or tasks would appear to stall until I moved the mouse or sent a packet over the network. But this
is hard to prove, just feels better.
Regards,
Brad
--
"Human beings, who are almost unique in having the ability
to learn from the experience of others, are also remarkable
for their apparent disinclination to do so." -- Douglas Adams
- [Qemu-devel] "Issue" With non-blocking IO patch,
Brad Campbell <=