Re: [RFC 01/16] blkcg:Introduce blkio.app_identifier knob to blkio controller

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On 8/4/2020 7:21 AM, Tejun Heo wrote:
Hello,

On Tue, Aug 04, 2020 at 01:31:30PM +0200, Daniel Wagner wrote:
Hi,

[cc Tejun]

On Tue, Aug 04, 2020 at 07:43:01AM +0530, Muneendra wrote:
This Patch added a unique application identifier i.e
blkio.app_identifier knob to  blkio controller which
allows identification of traffic sources at an
individual cgroup based Applications
(ex:virtual machine (VM))level in both host and
fabric infrastructure.
I'm not sure it makes sense to introduce custom IDs for these given that
there already are unique per-host cgroup IDs which aren't recycled.

Thanks.


If the VM moves to a different host, does the per-host cgroup IDs migrate with the VM ?   If not, we need to have an identifier that moves with the VM and which is independent of what host the VM is residing on.

-- james





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