-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 10/14/2012 05:21 PM, Jiri Slaby wrote:

On 10/14/2012 04:02 PM, Cristian Rodríguez wrote:

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Hi:

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Now that the kernel nicely autoloads the CPU microcode updates, the following problem remains. what should happend when the microcode package is updated ?

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* The way I believe it should work*

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This is not an userspace problem, the kernel must watch the microcode file it loaded before and reload it as needed.

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* Other hackish ways *

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- Teach udev to do the work for us.

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- Add systemd.path(5) units and watch the microcode directory for changes.

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- reload the module on package update (fugly)

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Any thoughts ?

On %postun do

s/postun/postin/ of course. Sorry for the confusion.

test -f /sys/devices/system/cpu/microcode/reload && \ /bin/echo 1 > /sys/devices/system/cpu/microcode/reload

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On 14.10.12 at 17:21, Jiri Slaby wrote: On %postun do test -f /sys/devices/system/cpu/microcode/reload && \ /bin/echo 1 > /sys/devices/system/cpu/microcode/reload

Which doesn't (currently) cover the Xen case - the file referred to (if corrected to include the CPU-specific portion) doesn't exist on Xen kernels, as it makes no sense there (and the fact that it does exist in pv-ops kernels is just one of the many flaws there). Jan -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org

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On 15.10.12 at 10:36, Jiri Slaby wrote: On 10/15/2012 10:31 AM, Jan Beulich wrote:

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On 14.10.12 at 17:21, Jiri Slaby wrote: On %postun do test -f /sys/devices/system/cpu/microcode/reload && \ /bin/echo 1 > /sys/devices/system/cpu/microcode/reload

Which doesn't (currently) cover the Xen case - the file referred to (if corrected to include the CPU-specific portion) doesn't exist on Xen kernels, as it makes no sense there (and the fact that it does exist in pv-ops kernels is just one of the many flaws there).

What do you mean exactly? Do you need some action taken on xen? That the file does not exist is covered by the test -f, right?

Yes - an alternative action (e.g. using the legacy interface) should be taken on Xen. Jan -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org

Am 14.10.2012 18:24, schrieb Jeff Mahoney:

Since the package update is by definition when the file will be udpated -- Jiri's idea of a postinstall script sounds ideal.

Another question is if reloading the microcode on a fully running system is even a safe thing to do or if that should only be done during boot. There might be a reason why you usually get microcode updates via BIOS updates ;-) -- Stefan Seyfried "If your lighter runs out of fluid or flint and stops making fire, and you can't be bothered to figure out about lighter fluid or flint, that is not Zippo's fault." -- bkw -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org