Re: [Xen-devel] [PATCH] use consistent values when consuming runtime-changeable parameters

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, Oct 30, 2018 at 08:44:20AM -0600, Jan Beulich wrote:
> There's no guarantee that e.g. a switch() control expression's memory
> operand(s) get(s) read just once. Guard against the compiler producing
> "unexpected" code by sprinkling around some ACCESS_ONCE().
> 
> I'm leaving alone opt_conswitch[]: It gets accessed in quite a few
> places anyway, and an intermediate change won't have any severe effect
> afaict.
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

I'm curious how you came up with the list of parameters that need
fixing.

Wei.

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