87 lines
3.6 KiB
Diff
87 lines
3.6 KiB
Diff
|
From 932d0761f1f473638a38614796bd14939cdd6215 Mon Sep 17 00:00:00 2001
|
||
|
|
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
|
||
|
|
Date: Wed, 1 Aug 2018 13:55:05 +0100
|
||
|
|
Subject: [PATCH 01/21] migration: stop compressing page in migration thread
|
||
|
|
|
||
|
|
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
|
||
|
|
Message-id: <20180801135522.11658-2-dgilbert@redhat.com>
|
||
|
|
Patchwork-id: 81577
|
||
|
|
O-Subject: [qemu-kvm RHEL8/virt212 PATCH 01/18] migration: stop compressing page in migration thread
|
||
|
|
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>
|
||
|
|
|
||
|
|
As compression is a heavy work, do not do it in migration thread,
|
||
|
|
instead, we post it out as a normal page
|
||
|
|
|
||
|
|
Reviewed-by: Wei Wang <wei.w.wang@intel.com>
|
||
|
|
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: <20180330075128.26919-2-xiaoguangrong@tencent.com>
|
||
|
|
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
|
||
|
|
(cherry picked from commit 263a289ae61c8344a417a95b0142650fdff3af56)
|
||
|
|
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
|
||
|
|
---
|
||
|
|
migration/ram.c | 32 ++++++++++++++++----------------
|
||
|
|
1 file changed, 16 insertions(+), 16 deletions(-)
|
||
|
|
|
||
|
|
diff --git a/migration/ram.c b/migration/ram.c
|
||
|
|
index 00c06b5..f27038a 100644
|
||
|
|
--- a/migration/ram.c
|
||
|
|
+++ b/migration/ram.c
|
||
|
|
@@ -1138,7 +1138,7 @@ static int ram_save_compressed_page(RAMState *rs, PageSearchStatus *pss,
|
||
|
|
int pages = -1;
|
||
|
|
uint64_t bytes_xmit = 0;
|
||
|
|
uint8_t *p;
|
||
|
|
- int ret, blen;
|
||
|
|
+ int ret;
|
||
|
|
RAMBlock *block = pss->block;
|
||
|
|
ram_addr_t offset = pss->page << TARGET_PAGE_BITS;
|
||
|
|
|
||
|
|
@@ -1168,23 +1168,23 @@ static int ram_save_compressed_page(RAMState *rs, PageSearchStatus *pss,
|
||
|
|
if (block != rs->last_sent_block) {
|
||
|
|
flush_compressed_data(rs);
|
||
|
|
pages = save_zero_page(rs, block, offset);
|
||
|
|
- if (pages == -1) {
|
||
|
|
- /* Make sure the first page is sent out before other pages */
|
||
|
|
- bytes_xmit = save_page_header(rs, rs->f, block, offset |
|
||
|
|
- RAM_SAVE_FLAG_COMPRESS_PAGE);
|
||
|
|
- blen = qemu_put_compression_data(rs->f, p, TARGET_PAGE_SIZE,
|
||
|
|
- migrate_compress_level());
|
||
|
|
- if (blen > 0) {
|
||
|
|
- ram_counters.transferred += bytes_xmit + blen;
|
||
|
|
- ram_counters.normal++;
|
||
|
|
- pages = 1;
|
||
|
|
- } else {
|
||
|
|
- qemu_file_set_error(rs->f, blen);
|
||
|
|
- error_report("compressed data failed!");
|
||
|
|
- }
|
||
|
|
- }
|
||
|
|
if (pages > 0) {
|
||
|
|
ram_release_pages(block->idstr, offset, pages);
|
||
|
|
+ } else {
|
||
|
|
+ /*
|
||
|
|
+ * Make sure the first page is sent out before other pages.
|
||
|
|
+ *
|
||
|
|
+ * we post it as normal page as compression will take much
|
||
|
|
+ * CPU resource.
|
||
|
|
+ */
|
||
|
|
+ ram_counters.transferred += save_page_header(rs, rs->f, block,
|
||
|
|
+ offset | RAM_SAVE_FLAG_PAGE);
|
||
|
|
+ qemu_put_buffer_async(rs->f, p, TARGET_PAGE_SIZE,
|
||
|
|
+ migrate_release_ram() &
|
||
|
|
+ migration_in_postcopy());
|
||
|
|
+ ram_counters.transferred += TARGET_PAGE_SIZE;
|
||
|
|
+ ram_counters.normal++;
|
||
|
|
+ pages = 1;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
pages = save_zero_page(rs, block, offset);
|
||
|
|
--
|
||
|
|
1.8.3.1
|
||
|
|
|