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Re: [Qemu-devel] Register uhci_reset() callback.
From: |
Gleb Natapov |
Subject: |
Re: [Qemu-devel] Register uhci_reset() callback. |
Date: |
Thu, 11 Jun 2009 19:40:45 +0300 |
On Thu, Jun 11, 2009 at 05:38:03PM +0100, Jamie Lokier wrote:
> Gleb Natapov wrote:
> > RHEL4.8 hangs after reboot because usb interrupt is not goes away. This
> > patch fixes it. Reseting all devices on a system reset is a right thing to
> > do
> > even if there is no reproducible bug exist.
>
> I've got real hardware with this problem! It doesn't reset the USB
> hardware (with some kinds of reset), and after reset the kernel runs
> about 100x too slow because it's getting a high rate of USB
> interrupts, until it loads the USB driver.
>
> In the real hardware the solution is to explicitly shut down the USB
> chip prior to manual reset, and fortunately the watchdog/power-on
> resets do reset the USB chip anyway.
>
> So I definitely support the idea that all components should be reset
> on a system reset event :-)
>
> Now, a CPU-only reset, such as triple fault on x86, that's a bit different.
>
On x86 triple fault wired to system reset.
--
Gleb.
- [Qemu-devel] Register uhci_reset() callback., Gleb Natapov, 2009/06/11
- Re: [Qemu-devel] Register uhci_reset() callback., Paul Brook, 2009/06/11
- Re: [Qemu-devel] Register uhci_reset() callback., Gleb Natapov, 2009/06/11
- Re: [Qemu-devel] Register uhci_reset() callback., Paul Brook, 2009/06/11
- Re: [Qemu-devel] Register uhci_reset() callback., Gleb Natapov, 2009/06/11
- Re: [Qemu-devel] Register uhci_reset() callback., Jamie Lokier, 2009/06/11
- Re: [Qemu-devel] Register uhci_reset() callback.,
Gleb Natapov <=
- Re: [Qemu-devel] Register uhci_reset() callback., Avi Kivity, 2009/06/15
- Re: [Qemu-devel] Register uhci_reset() callback., Jamie Lokier, 2009/06/16
- Re: [Qemu-devel] Register uhci_reset() callback., Avi Kivity, 2009/06/16
- Re: [Qemu-devel] Register uhci_reset() callback., Jamie Lokier, 2009/06/16
- Re: [Qemu-devel] Register uhci_reset() callback., Avi Kivity, 2009/06/15
- Re: [Qemu-devel] Register uhci_reset() callback., Gleb Natapov, 2009/06/15
- Re: [Qemu-devel] Register uhci_reset() callback., Avi Kivity, 2009/06/15
- Re: [Qemu-devel] Register uhci_reset() callback., Gleb Natapov, 2009/06/15
- Re: [Qemu-devel] Register uhci_reset() callback., Paul Brook, 2009/06/15
- Re: [Qemu-devel] Register uhci_reset() callback., Gleb Natapov, 2009/06/15