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Re: [Qemu-devel] [PATCH v2 1/2] block: add the support to drain throttle
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v2 1/2] block: add the support to drain throttled requests |
Date: |
Mon, 12 Mar 2012 08:27:31 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120216 Thunderbird/10.0.1 |
Il 12/03/2012 07:29, address@hidden ha scritto:
> From: Zhi Yong Wu <address@hidden>
>
> Signed-off-by: Zhi Yong Wu <address@hidden>
> ---
> block.c | 21 +++++++++++++++++++++
> block_int.h | 1 +
> 2 files changed, 22 insertions(+), 0 deletions(-)
>
> diff --git a/block.c b/block.c
> index 52ffe14..0825168 100644
> --- a/block.c
> +++ b/block.c
> @@ -853,6 +853,21 @@ void bdrv_close_all(void)
> }
> }
>
> +/**
> + * Complete all pending requests for a block device
> + */
> +void bdrv_drain(BlockDriverState *bs)
> +{
> + do {
> + qemu_co_queue_restart_all(&bs->throttled_reqs);
> + } while (!qemu_co_queue_empty(&bs->throttled_reqs));
> +
> + qemu_aio_flush();
This doesn't work, qemu_aio_flush can start new I/O.
Paolo