Re: [PATCH 3/7] migration: Drop postcopy_chunk_hostpages()

[Juan Quintela]

Peter Xu <peterx@redhat.com> wrote:
> This function calls three functions:
>
>   - postcopy_discard_send_init(ms, block->idstr);
>   - postcopy_chunk_hostpages_pass(ms, block);
>   - postcopy_discard_send_finish(ms);
>
> However only the 2nd function call is meaningful.  It's major role is to make
> sure dirty bits are applied in host-page-size granule, so there will be no
> partial dirty bits set for a whole host page if huge pages are used.
>
> The 1st/3rd call are for latter when we want to send the disgard ranges.
> They're mostly no-op here besides some tracepoints (which are misleading!).
>
> Drop them, then we can directly drop postcopy_chunk_hostpages() as a whole
> because we can call postcopy_chunk_hostpages_pass() directly.
>
> There're still some nice comments above postcopy_chunk_hostpages() that 
> explain
> what it does.  Copy it over to the caller's site.
>
> Signed-off-by: Peter Xu <peterx@redhat.com>

Reviewed-by: Juan Quintela <quintela@redhat.com>

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