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[Qemu-devel] [PATCH] migration/block: Avoid involve into blk_drain too f
From: |
jemmy858585 |
Subject: |
[Qemu-devel] [PATCH] migration/block: Avoid involve into blk_drain too frequently |
Date: |
Tue, 14 Mar 2017 15:57:23 +0800 |
From: Lidong Chen <address@hidden>
Increase bmds->cur_dirty after submit io, so reduce the frequency involve into
blk_drain, and improve the performance obviously when block migration.
Signed-off-by: Lidong Chen <address@hidden>
---
migration/block.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/migration/block.c b/migration/block.c
index 6741228..f059cca 100644
--- a/migration/block.c
+++ b/migration/block.c
@@ -576,6 +576,8 @@ static int mig_save_device_dirty(QEMUFile *f,
BlkMigDevState *bmds,
}
bdrv_reset_dirty_bitmap(bmds->dirty_bitmap, sector, nr_sectors);
+ sector += nr_sectors;
+ bmds->cur_dirty = sector;
break;
}
sector += BDRV_SECTORS_PER_DIRTY_CHUNK;
--
1.8.3.1
- [Qemu-devel] [PATCH] migration/block: Avoid involve into blk_drain too frequently,
jemmy858585 <=