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From: Michael Ellerman <>
	Laurent Dufour <>
Subject: Re: [PATCH v5] pseries: prevent free CPU ids to be reused on another node
Date: Wed, 18 Aug 2021 23:38:39 +1000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Thu, 29 Apr 2021 19:49:08 +0200, Laurent Dufour wrote:
> When a CPU is hot added, the CPU ids are taken from the available mask from
> the lower possible set. If that set of values was previously used for CPU
> attached to a different node, this seems to application like if these CPUs
> have migrated from a node to another one which is not expected in real
> life.
> To prevent this, it is needed to record the CPU ids used for each node and
> to not reuse them on another node. However, to prevent CPU hot plug to
> fail, in the case the CPU ids is starved on a node, the capability to reuse
> other nodes’ free CPU ids is kept. A warning is displayed in such a case
> to warn the user.
> [...]

Applied to powerpc/next.

[1/1] pseries: prevent free CPU ids to be reused on another node


      parent reply	other threads:[~2021-08-18 13:46 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-29 17:49 [PATCH v5] pseries: prevent free CPU ids to be reused on another node Laurent Dufour
2021-07-01  8:35 ` Laurent Dufour
2021-07-19  9:13 ` Laurent Dufour
2021-08-03 16:54 ` Nathan Lynch
2021-08-03 17:37   ` Laurent Dufour
2021-08-18 13:38 ` Michael Ellerman [this message]

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