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SubjectRe: Sleeping in user_access section
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On 11/23/18 3:57 AM, Julien Thierry wrote:
>
> On x86, the EFLAGS.AC bit is also saved upon exception and I think it is
> cleared upon exception entry so there is implicit exit from the
> user_access mode when taking exception/interrupt.
>

No, it is restored, not cleared.

In summary: on exceptions, user_access regions are suspended, and on
return the user_access status is resumed.

However, explicitly calling sleeping functions is not supported.

-hpa

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