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Re: [PATCH 08/12] copy-before-write: Fix open with child in iothread
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [PATCH 08/12] copy-before-write: Fix open with child in iothread |
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Date: |
Thu, 25 May 2023 14:55:25 -0400 |
On Thu, May 25, 2023 at 02:47:09PM +0200, Kevin Wolf wrote:
> The AioContext lock must not be held for bdrv_open_child(), but it is
> necessary for the followig operations, in particular those using nested
> event loops in coroutine wrappers.
>
> Temporarily dropping the main AioContext lock is not necessary because
> we know we run in the main thread.
>
> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
> ---
> block/copy-before-write.c | 21 ++++++++++++++++-----
> 1 file changed, 16 insertions(+), 5 deletions(-)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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- [PATCH 03/12] block: Take main AioContext lock when calling bdrv_open(), (continued)
- [PATCH 03/12] block: Take main AioContext lock when calling bdrv_open(), Kevin Wolf, 2023/05/25
- [PATCH 05/12] mirror: Hold main AioContext lock for calling bdrv_open_backing_file(), Kevin Wolf, 2023/05/25
- [PATCH 07/12] raw-format: Fix open with 'file' in iothread, Kevin Wolf, 2023/05/25
- [PATCH 12/12] iotests: Test blockdev-create in iothread, Kevin Wolf, 2023/05/25
- [PATCH 08/12] copy-before-write: Fix open with child in iothread, Kevin Wolf, 2023/05/25
- [PATCH 04/12] block-backend: Fix blk_new_open() for iothreads, Kevin Wolf, 2023/05/25
- [PATCH 02/12] block: Clarify locking rules for bdrv_open(_inherit)(), Kevin Wolf, 2023/05/25
- [PATCH 09/12] block: Take AioContext lock in bdrv_open_driver(), Kevin Wolf, 2023/05/25
- [PATCH 06/12] qcow2: Fix open with 'file' in iothread, Kevin Wolf, 2023/05/25