Xen devel - Jun 2006 - [PATCH] x86: fix microcode updater

This patch syncs up the microcode driver with linux 2.6.17 and adds on top of
this enhancements (yet to be submitted to
lkml) to prevent the driver from disabling interrupts for long periods of time.
This is done by IPI-ing all remote CPUs
sequentially rather than at once so they don''t all race for the same
spin lock(s). Additionally, redundant updates on
multiple siblings of the same core are now suppressed.

Signed-off-by: Jan Beulich <jbeulich@novell.com>


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On 23 Jun 2006, at 13:43, Jan Beulich wrote:
> This patch syncs up the microcode driver with linux 2.6.17 and adds on 
> top of this enhancements (yet to be submitted to
> lkml) to prevent the driver from disabling interrupts for long periods 
> of time. This is done by IPI-ing all remote CPUs
> sequentially rather than at once so they don''t all race for the
same
> spin lock(s). Additionally, redundant updates on
> multiple siblings of the same core are now suppressed.
The patch claims to upgrade to driver version 1.14b which isn''t in 
2.6.17 as far as I can tell. In fact I could only find even 1.14a by 
downloading 2.6.17-git12.

What I''ve done is upgrade the microcode driver to 1.14a in 
xen-unstable. Please send separate patches to upgrade to 1.14b (if you 
still want to do that; also let me know where you found it!) and to 
make any not-Linux-upstream changes.

  Thanks,
  Keir


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