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From e3c0812c4d61c956ac5b0641826c4e4fbda55954 Mon Sep 17 00:00:00 2001
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Date: Wed, 1 Aug 2018 13:55:14 +0100
Subject: [PATCH 10/21] migration: remove ram_save_compressed_page()
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-id: <20180801135522.11658-11-dgilbert@redhat.com>
Patchwork-id: 81578
O-Subject: [qemu-kvm RHEL8/virt212 PATCH 10/18] migration: remove ram_save_compressed_page()
Bugzilla: 1594384
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Acked-by: John Snow <jsnow@redhat.com>
RH-Acked-by: Juan Quintela <quintela@redhat.com>
From: Xiao Guangrong <xiaoguangrong@tencent.com>
Now, we can reuse the path in ram_save_page() to post the page out
as normal, then the only thing remained in ram_save_compressed_page()
is compression that we can move it out to the caller
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Xiao Guangrong <xiaoguangrong@tencent.com>
Message-Id: <20180330075128.26919-11-xiaoguangrong@tencent.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
(cherry picked from commit da3f56cb2e767016d3f204837a77caf35b463f90)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
migration/ram.c | 45 ++++++++-------------------------------------
1 file changed, 8 insertions(+), 37 deletions(-)
diff --git a/migration/ram.c b/migration/ram.c
index 908879f..466609f 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -1186,41 +1186,6 @@ static int compress_page_with_multi_thread(RAMState *rs, RAMBlock *block,
}
/**
- * ram_save_compressed_page: compress the given page and send it to the stream
- *
- * Returns the number of pages written.
- *
- * @rs: current RAM state
- * @block: block that contains the page we want to send
- * @offset: offset inside the block for the page
- * @last_stage: if we are at the completion stage
- */
-static int ram_save_compressed_page(RAMState *rs, PageSearchStatus *pss,
- bool last_stage)
-{
- int pages = -1;
- uint8_t *p;
- RAMBlock *block = pss->block;
- ram_addr_t offset = pss->page << TARGET_PAGE_BITS;
-
- p = block->host + offset;
-
- if (block != rs->last_sent_block) {
- /*
- * Make sure the first page is sent out before other pages.
- *
- * we post it as normal page as compression will take much
- * CPU resource.
- */
- pages = save_normal_page(rs, block, offset, p, true);
- } else {
- pages = compress_page_with_multi_thread(rs, block, offset);
- }
-
- return pages;
-}
-
-/**
* find_dirty_block: find the next dirty page and update any state
* associated with the search process.
*
@@ -1519,8 +1484,14 @@ static int ram_save_target_page(RAMState *rs, PageSearchStatus *pss,
return res;
}
- if (save_page_use_compression(rs)) {
- return ram_save_compressed_page(rs, pss, last_stage);
+ /*
+ * Make sure the first page is sent out before other pages.
+ *
+ * we post it as normal page as compression will take much
+ * CPU resource.
+ */
+ if (block == rs->last_sent_block && save_page_use_compression(rs)) {
+ res = compress_page_with_multi_thread(rs, block, offset);
}
return ram_save_page(rs, pss, last_stage);
--
1.8.3.1