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Re: [PATCH v1 00/13] migrate/ram: Fix resizing RAM blocks while migratin

From: David Hildenbrand
Subject: Re: [PATCH v1 00/13] migrate/ram: Fix resizing RAM blocks while migrating
Date: Fri, 21 Feb 2020 13:13:56 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0

On 19.02.20 17:17, David Hildenbrand wrote:
> This is the follow up of
>     "[PATCH RFC] memory: Don't allow to resize RAM while migrating" [1]
> This series contains some (slightly modified) patches also contained in:
>     "[PATCH v2 fixed 00/16] Ram blocks with resizable anonymous allocations
>      under POSIX" [2]
> That series will be based on this series. The last patch (#13) in this
> series could be moved to the other series, but I decided to include it in
> here for now (similar context).
> I realized that resizing RAM blocks while the guest is being migrated
> (precopy: resize while still running on the source, postcopy: resize
>  while already running on the target) is buggy. In case of precopy, we
> can simply cancel migration. Postcopy handling is more involved. Resizing
> can currently happen during a guest reboot, triggered by ACPI rebuilds.
> Along with the fixes, some cleanups.
> [1] https://lkml.kernel.org/r/address@hidden
> [2] https://lkml.kernel.org/r/address@hidden

I'm working on some reworks/cleanups and some testing (with virtio-mem
because there it's easy to trigger resizes). So whoever wants to have a
look, better to wait for the updated series :)


David / dhildenb

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