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migration: remove ram_save_compressed_page()

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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>
This commit is contained in:
Xiao Guangrong 2018-03-30 15:51:28 +08:00 committed by Dr. David Alan Gilbert
parent 65dacaa04f
commit da3f56cb2e
1 changed files with 8 additions and 37 deletions
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45
migration/ram.c
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@ -1184,41 +1184,6 @@ static int compress_page_with_multi_thread(RAMState *rs, RAMBlock *block,
return pages;
}
/**
* 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.
@ -1518,8 +1483,14 @@ 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);