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[Qemu-devel] Re: [PATCH 0/3]: BLOCK_WATERMARK QMP event
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] Re: [PATCH 0/3]: BLOCK_WATERMARK QMP event |
Date: |
Wed, 10 Mar 2010 09:33:31 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.7) Gecko/20100120 Fedora/3.0.1-1.fc12 Thunderbird/3.0.1 |
Am 09.03.2010 23:53, schrieb Luiz Capitulino:
> Hi,
>
> This series is based on a previous series submitted by Uri Lublin:
>
> http://lists.gnu.org/archive/html/qemu-devel/2009-03/msg00864.html
>
> Details on the patches, except for this question: does it make sense to have
> a 'low' watermark for block devices?
>
> I think it doesn't, then the event (and the monitor accompanying command)
> should be called BLOCK_HIGH_WATERMARK. But this makes the event very
> unflexible, so I have called it BLOCK_WATERMARK and added parameters for the
> high/low watermark type.
When should a low watermark trigger? Images only ever grow, so testing
if the highest allocated block goes below some watermark would never
work (except for some unlikely special cases like deleting a snapshot
after which no new clusters have been allocated).
> It's a machine protocol, so I don't think the additional parameter
> matters much.
I don't think anyone is ever going to use it, but it probably wouldn't
hurt either.
Kevin
- Re: [Qemu-devel] [PATCH 0/3]: BLOCK_WATERMARK QMP event, (continued)
- Re: [Qemu-devel] [PATCH 0/3]: BLOCK_WATERMARK QMP event, Kevin Wolf, 2010/03/10
- Re: [Qemu-devel] [PATCH 0/3]: BLOCK_WATERMARK QMP event, Luiz Capitulino, 2010/03/10
- Re: [Qemu-devel] [PATCH 0/3]: BLOCK_WATERMARK QMP event, Anthony Liguori, 2010/03/10
- Re: [Qemu-devel] [PATCH 0/3]: BLOCK_WATERMARK QMP event, Kevin Wolf, 2010/03/11
- Re: [Qemu-devel] [PATCH 0/3]: BLOCK_WATERMARK QMP event, Anthony Liguori, 2010/03/11
- Re: [Qemu-devel] [PATCH 0/3]: BLOCK_WATERMARK QMP event, Avi Kivity, 2010/03/11
- Re: [Qemu-devel] [PATCH 0/3]: BLOCK_WATERMARK QMP event, Anthony Liguori, 2010/03/11
- Re: [Qemu-devel] [PATCH 0/3]: BLOCK_WATERMARK QMP event, Avi Kivity, 2010/03/11
- Re: [Qemu-devel] [PATCH 0/3]: BLOCK_WATERMARK QMP event, Kevin Wolf, 2010/03/11
[Qemu-devel] Re: [PATCH 0/3]: BLOCK_WATERMARK QMP event,
Kevin Wolf <=