From e3c0812c4d61c956ac5b0641826c4e4fbda55954 Mon Sep 17 00:00:00 2001 From: "Dr. David Alan Gilbert" 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 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 RH-Acked-by: John Snow RH-Acked-by: Juan Quintela From: Xiao Guangrong 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 Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Xiao Guangrong Message-Id: <20180330075128.26919-11-xiaoguangrong@tencent.com> Signed-off-by: Dr. David Alan Gilbert (cherry picked from commit da3f56cb2e767016d3f204837a77caf35b463f90) Signed-off-by: Danilo C. L. de Paula --- 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