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Re: [Qemu-devel] Hardware watchdogs (patch for discussion only)
From: |
Steve Fosdick |
Subject: |
Re: [Qemu-devel] Hardware watchdogs (patch for discussion only) |
Date: |
Fri, 27 Feb 2009 09:55:31 +0000 |
On Thu, 2009-02-26 at 14:45 +0000, Richard W.M. Jones wrote:
> The Intel 6300ESB in fact offers this possibility already. As with
> other high-end watchdog hardware, it can be configured to send a
> "pretimer interrupt". For example, if the watchdog is set to expire
> after 60 seconds, you can get an interrupt N seconds before this,
> which you can use to try a graceful shutdown.
>
> Having said that, Linux watchdog software doesn't support this feature ...
Am I right in thinking that the kernel will not respond to an ACPI event
that indicates a power button has been pressed but forward it to
userspace where something (acpid) should respond?
If so there isn't much point in making the pre-timer interrupt do that
as we are assuming userspace is dead. Perhaps instead it could use the
Alt-SysRq mechanism to do an emergency sync,reboot?
Regards,
Steve.
- [Qemu-devel] Hardware watchdogs (patch for discussion only), Richard W.M. Jones, 2009/02/25
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Daniel P. Berrange, 2009/02/26
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Richard W.M. Jones, 2009/02/26
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Steve Fosdick, 2009/02/26
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Jamie Lokier, 2009/02/26
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Steve Fosdick, 2009/02/27
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Paul Brook, 2009/02/27
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Jamie Lokier, 2009/02/28
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Andreas Färber, 2009/02/28
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Richard W.M. Jones, 2009/02/28