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From d66f4034a5aa54082d467584d90db79c52bd001c Mon Sep 17 00:00:00 2001
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From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
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Date: Wed, 1 Aug 2018 13:55:13 +0100
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Subject: [PATCH 09/21] migration: introduce save_normal_page()
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RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Message-id: <20180801135522.11658-10-dgilbert@redhat.com>
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Patchwork-id: 81566
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O-Subject: [qemu-kvm RHEL8/virt212 PATCH 09/18] migration: introduce save_normal_page()
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Bugzilla: 1594384
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RH-Acked-by: Peter Xu <peterx@redhat.com>
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RH-Acked-by: John Snow <jsnow@redhat.com>
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RH-Acked-by: Juan Quintela <quintela@redhat.com>
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From: Xiao Guangrong <xiaoguangrong@tencent.com>
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It directly sends the page to the stream neither checking zero nor
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using xbzrle or compression
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Reviewed-by: Peter Xu <peterx@redhat.com>
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Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Signed-off-by: Xiao Guangrong <xiaoguangrong@tencent.com>
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Message-Id: <20180330075128.26919-10-xiaoguangrong@tencent.com>
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Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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(cherry picked from commit 65dacaa04fa7e6104cbcee9251c7845355769a10)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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migration/ram.c | 50 ++++++++++++++++++++++++++++++--------------------
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1 file changed, 30 insertions(+), 20 deletions(-)
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diff --git a/migration/ram.c b/migration/ram.c
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index 6e8a7e2..908879f 100644
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--- a/migration/ram.c
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+++ b/migration/ram.c
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@@ -1013,6 +1013,34 @@ static bool control_save_page(RAMState *rs, RAMBlock *block, ram_addr_t offset,
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return true;
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}
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+/*
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+ * directly send the page to the stream
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+ *
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+ * Returns the number of pages written.
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+ *
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+ * @rs: current RAM state
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+ * @block: block that contains the page we want to send
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+ * @offset: offset inside the block for the page
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+ * @buf: the page to be sent
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+ * @async: send to page asyncly
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+ */
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+static int save_normal_page(RAMState *rs, RAMBlock *block, ram_addr_t offset,
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+ uint8_t *buf, bool async)
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+{
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+ ram_counters.transferred += save_page_header(rs, rs->f, block,
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+ offset | RAM_SAVE_FLAG_PAGE);
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+ if (async) {
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+ qemu_put_buffer_async(rs->f, buf, TARGET_PAGE_SIZE,
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+ migrate_release_ram() &
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+ migration_in_postcopy());
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+ } else {
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+ qemu_put_buffer(rs->f, buf, TARGET_PAGE_SIZE);
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+ }
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+ ram_counters.transferred += TARGET_PAGE_SIZE;
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+ ram_counters.normal++;
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+ return 1;
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+}
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+
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/**
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* ram_save_page: send the given page to the stream
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*
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@@ -1053,18 +1081,7 @@ static int ram_save_page(RAMState *rs, PageSearchStatus *pss, bool last_stage)
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/* XBZRLE overflow or normal page */
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if (pages == -1) {
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- ram_counters.transferred +=
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- save_page_header(rs, rs->f, block, offset | RAM_SAVE_FLAG_PAGE);
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- if (send_async) {
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- qemu_put_buffer_async(rs->f, p, TARGET_PAGE_SIZE,
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- migrate_release_ram() &
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- migration_in_postcopy());
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- } else {
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- qemu_put_buffer(rs->f, p, TARGET_PAGE_SIZE);
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- }
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- ram_counters.transferred += TARGET_PAGE_SIZE;
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- pages = 1;
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- ram_counters.normal++;
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+ pages = save_normal_page(rs, block, offset, p, send_async);
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}
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XBZRLE_cache_unlock();
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@@ -1195,14 +1212,7 @@ static int ram_save_compressed_page(RAMState *rs, PageSearchStatus *pss,
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* we post it as normal page as compression will take much
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* CPU resource.
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*/
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- ram_counters.transferred += save_page_header(rs, rs->f, block,
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- offset | RAM_SAVE_FLAG_PAGE);
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- qemu_put_buffer_async(rs->f, p, TARGET_PAGE_SIZE,
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- migrate_release_ram() &
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- migration_in_postcopy());
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- ram_counters.transferred += TARGET_PAGE_SIZE;
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- ram_counters.normal++;
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- pages = 1;
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+ pages = save_normal_page(rs, block, offset, p, true);
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} else {
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pages = compress_page_with_multi_thread(rs, block, offset);
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}
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--
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1.8.3.1
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