"Rafael J. Wysocki" <[email protected]> wrote:
>
> Now if the mapped pages that are not mapped by the
> current task are considered, it turns out that they would change only if they
> were reclaimed by try_to_free_pages(). Thus if we take them out of reach
> of try_to_free_pages(), for example by (temporarily) moving them out of their
> respective LRU lists after creating the image, we will be able to include them
> in the image without copying.
I'm a bit curious about how this is true. There are all sorts of way in
which there could be activity against these pages - interrupt-time
asynchronous network Tx completion, async interrupt-time direct-io
completion, tasklets, schedule_work(), etc, etc.
So... could we check your homework on this please? How come only page
reclaim can disturb these pages?
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