From ea2faf0c35f0f9d1f3d7c9c88637b9014575e02b Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Thu, 31 Mar 2022 11:08:41 -0400 Subject: [PATCH] migration: Add pss.postcopy_requested status MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This boolean flag shows whether the current page during migration is triggered by postcopy or not. Then in ram_save_host_page() and deeper stack we'll be able to have a reference on the priority of this page. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Peter Xu Message-Id: <20220331150857.74406-4-peterx@redhat.com> Reviewed-by: Daniel P. Berrangé Signed-off-by: Dr. David Alan Gilbert --- migration/ram.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/migration/ram.c b/migration/ram.c index 3532f64ecb..bfcd45a36e 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -414,6 +414,8 @@ struct PageSearchStatus { unsigned long page; /* Set once we wrap around */ bool complete_round; + /* Whether current page is explicitly requested by postcopy */ + bool postcopy_requested; }; typedef struct PageSearchStatus PageSearchStatus; @@ -1487,6 +1489,9 @@ retry: */ static bool find_dirty_block(RAMState *rs, PageSearchStatus *pss, bool *again) { + /* This is not a postcopy requested page */ + pss->postcopy_requested = false; + pss->page = migration_bitmap_find_dirty(rs, pss->block, pss->page); if (pss->complete_round && pss->block == rs->last_seen_block && pss->page >= rs->last_page) { @@ -1981,6 +1986,7 @@ static bool get_queued_page(RAMState *rs, PageSearchStatus *pss) * really rare. */ pss->complete_round = false; + pss->postcopy_requested = true; } return !!block;