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Re: [Qemu-block] [PATCH 1/5] block/dirty-bitmap: add lock to bdrv_enable
From: |
Jeff Cody |
Subject: |
Re: [Qemu-block] [PATCH 1/5] block/dirty-bitmap: add lock to bdrv_enable/disable_dirty_bitmap |
Date: |
Wed, 6 Jun 2018 09:23:26 -0400 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
On Tue, Jun 05, 2018 at 02:59:01PM -0400, John Snow wrote:
> From: Vladimir Sementsov-Ogievskiy <address@hidden>
>
> Add locks and remove comments about BQL accordingly to
> dirty_bitmap_mutex definition in block_int.h.
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
> Signed-off-by: John Snow <address@hidden>
Reviewed-by: Jeff Cody <address@hidden>
> ---
> block/dirty-bitmap.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
> index 967159479d..56234257f4 100644
> --- a/block/dirty-bitmap.c
> +++ b/block/dirty-bitmap.c
> @@ -442,18 +442,20 @@ void
> bdrv_remove_persistent_dirty_bitmap(BlockDriverState *bs,
> }
> }
>
> -/* Called with BQL taken. */
> void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
> {
> + bdrv_dirty_bitmap_lock(bitmap);
> assert(!bdrv_dirty_bitmap_frozen(bitmap));
> bitmap->disabled = true;
> + bdrv_dirty_bitmap_unlock(bitmap);
> }
>
> -/* Called with BQL taken. */
> void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
> {
> + bdrv_dirty_bitmap_lock(bitmap);
> assert(!bdrv_dirty_bitmap_frozen(bitmap));
> bitmap->disabled = false;
> + bdrv_dirty_bitmap_unlock(bitmap);
> }
>
> BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs)
> --
> 2.14.3
>
>
- [Qemu-block] [PATCH 0/5] block dirty bitmaps: support libvirt API, John Snow, 2018/06/05
- [Qemu-block] [PATCH 3/5] qmp: transaction support for x-block-dirty-bitmap-enable/disable, John Snow, 2018/06/05
- [Qemu-block] [PATCH 1/5] block/dirty-bitmap: add lock to bdrv_enable/disable_dirty_bitmap, John Snow, 2018/06/05
- Re: [Qemu-block] [PATCH 1/5] block/dirty-bitmap: add lock to bdrv_enable/disable_dirty_bitmap,
Jeff Cody <=
- [Qemu-block] [PATCH 2/5] qapi: add x-block-dirty-bitmap-enable/disable, John Snow, 2018/06/05
- [Qemu-block] [PATCH 4/5] qapi: add x-block-dirty-bitmap-merge, John Snow, 2018/06/05
- [Qemu-block] [PATCH 5/5] qapi: add disabled parameter to block-dirty-bitmap-add, John Snow, 2018/06/05