linux-kernel - Re: [PATCH v5 0/4] Extending NMI watchdog during LPM

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Date:   Fri, 29 Jul 2022 23:02:16 +1000
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     mpe@...erman.id.au, wim@...ux-watchdog.org, linux@...ck-us.net,
        npiggin@...il.com, nathanl@...ux.ibm.com,
        christophe.leroy@...roup.eu,
        Laurent Dufour <ldufour@...ux.ibm.com>, rdunlap@...radead.org
Cc:     haren@...ux.vnet.ibm.com, linuxppc-dev@...ts.ozlabs.org,
        hch@...radead.org, linux-kernel@...r.kernel.org,
        linux-watchdog@...r.kernel.org
Subject: Re: [PATCH v5 0/4] Extending NMI watchdog during LPM

On Wed, 13 Jul 2022 17:47:25 +0200, Laurent Dufour wrote:
> When a partition is transferred, once it arrives at the destination node,
> the partition is active but much of its memory must be transferred from the
> start node.
> 
> It depends on the activity in the partition, but the more CPU the partition
> has, the more memory to be transferred is likely to be. This causes latency
> when accessing pages that need to be transferred, and often, for large
> partitions, it triggers the NMI watchdog.
> 
> [...]

Applied to powerpc/next.

[1/4] powerpc/mobility: wait for memory transfer to complete
      https://git.kernel.org/powerpc/c/882c0d1704cf61df13f01933269202d51e74b9f3
[2/4] watchdog: export lockup_detector_reconfigure
      https://git.kernel.org/powerpc/c/7c56a8733d0a2a4be2438a7512566e5ce552fccf
[3/4] powerpc/watchdog: introduce a NMI watchdog's factor
      https://git.kernel.org/powerpc/c/f5e74e836097d1004077390717d4bd95d4a2c27a
[4/4] pseries/mobility: set NMI watchdog factor during an LPM
      https://git.kernel.org/powerpc/c/118b1366930c8c833b8b36abef657f40d4e26610

cheers