diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2010-11-12 16:07:50 -0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2010-11-24 17:31:06 +0100 |
| commit | 62155e2b51e3c282ddc30adbb6d7b8d3bb7c386e (patch) | |
| tree | 6ec145a5ba532f11162e4a73afc876613c44fde1 /block-migration.c | |
| parent | 9063f81415f3518ef8206e74085c2a92c96890a0 (diff) | |
block migration: do not submit multiple AIOs for same sector (v2)
An old version of this patch was applied to master, so this contains the
differences between v1 and v2.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block-migration.c')
| -rw-r--r-- | block-migration.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/block-migration.c b/block-migration.c index 3e66f4935..14753254d 100644 --- a/block-migration.c +++ b/block-migration.c @@ -146,8 +146,7 @@ static int bmds_aio_inflight(BlkMigDevState *bmds, int64_t sector) { int64_t chunk = sector / (int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK; - if (bmds->aio_bitmap && - (sector << BDRV_SECTOR_BITS) < bdrv_getlength(bmds->bs)) { + if ((sector << BDRV_SECTOR_BITS) < bdrv_getlength(bmds->bs)) { return !!(bmds->aio_bitmap[chunk / (sizeof(unsigned long) * 8)] & (1UL << (chunk % (sizeof(unsigned long) * 8)))); } else { @@ -169,13 +168,9 @@ static void bmds_set_aio_inflight(BlkMigDevState *bmds, int64_t sector_num, bit = start % (sizeof(unsigned long) * 8); val = bmds->aio_bitmap[idx]; if (set) { - if (!(val & (1UL << bit))) { - val |= 1UL << bit; - } + val |= 1UL << bit; } else { - if (val & (1UL << bit)) { - val &= ~(1UL << bit); - } + val &= ~(1UL << bit); } bmds->aio_bitmap[idx] = val; } @@ -385,8 +380,9 @@ static int mig_save_device_dirty(Monitor *mon, QEMUFile *f, int nr_sectors; for (sector = bmds->cur_dirty; sector < bmds->total_sectors;) { - if (bmds_aio_inflight(bmds, sector)) + if (bmds_aio_inflight(bmds, sector)) { qemu_aio_flush(); + } if (bdrv_get_dirty(bmds->bs, sector)) { if (total_sectors - sector < BDRV_SECTORS_PER_DIRTY_CHUNK) { |