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Re: [Qemu-block] [PATCH 0/3] mirror: Fix guest responsiveness during bit
From: |
Fam Zheng |
Subject: |
Re: [Qemu-block] [PATCH 0/3] mirror: Fix guest responsiveness during bitmap scan |
Date: |
Fri, 10 Jul 2015 14:43:50 +0800 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Thu, 07/09 14:02, Stefan Hajnoczi wrote:
> This patch only converts the mirror block job to use the new relax
> function. The other block jobs (stream, backup, commit) are still using
> a 0 ns delay and are therefore broken. They should probably be
> converted in the same series.
That's because they all can be perfectly mitigated by setting a reasonable
"speed" that matchs the host horsepower. Thinking about this again, I doubt
that lengthening the duration with a hardcoded value benifits everyone; and
before Alexandre's reply on old server/slow disks, I don't recall any report,
because the coroutines would already yield often enough, when waiting for IO to
complete. So I am not sure whether they're broken in practice.
Fam
- Re: [Qemu-block] [Qemu-devel] [PATCH 1/3] blockjob: Introduce block_job_relax_cpu, (continued)
[Qemu-block] [PATCH 2/3] mirror: Use block_job_relax_cpu during bitmap scanning, Fam Zheng, 2015/07/08
[Qemu-block] [PATCH 3/3] mirror: Speed up bitmap initial scanning, Fam Zheng, 2015/07/08
Re: [Qemu-block] [Qemu-devel] [PATCH 0/3] mirror: Fix guest responsiveness during bitmap scan, Alexandre DERUMIER, 2015/07/09
Re: [Qemu-block] [PATCH 0/3] mirror: Fix guest responsiveness during bitmap scan, Stefan Hajnoczi, 2015/07/09
- Re: [Qemu-block] [Qemu-devel] [PATCH 0/3] mirror: Fix guest responsiveness during bitmap scan, Alexandre DERUMIER, 2015/07/09
- Re: [Qemu-block] [PATCH 0/3] mirror: Fix guest responsiveness during bitmap scan,
Fam Zheng <=
- Re: [Qemu-block] [Qemu-devel] [PATCH 0/3] mirror: Fix guest responsiveness during bitmap scan, Alexandre DERUMIER, 2015/07/10
- Re: [Qemu-block] [Qemu-devel] [PATCH 0/3] mirror: Fix guest responsiveness during bitmap scan, Fam Zheng, 2015/07/10
- Re: [Qemu-block] [Qemu-devel] [PATCH 0/3] mirror: Fix guest responsiveness during bitmap scan, Alexandre DERUMIER, 2015/07/10
- Re: [Qemu-block] [Qemu-devel] [PATCH 0/3] mirror: Fix guest responsiveness during bitmap scan, Alexandre DERUMIER, 2015/07/10
- Re: [Qemu-block] [Qemu-devel] [PATCH 0/3] mirror: Fix guest responsiveness during bitmap scan, Fam Zheng, 2015/07/13
- Re: [Qemu-block] [Qemu-devel] [PATCH 0/3] mirror: Fix guest responsiveness during bitmap scan, Stefan Hajnoczi, 2015/07/14