linux-kernel - Re: [PATCH v3 00/11] Fix PM hibernation in Xen guests

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Date:   Fri, 11 Sep 2020 11:19:13 -0400
From:   boris.ostrovsky@...cle.com
To:     Anchal Agarwal <anchalag@...zon.com>, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, hpa@...or.com, x86@...nel.org,
        jgross@...e.com, linux-pm@...r.kernel.org, linux-mm@...ck.org,
        kamatam@...zon.com, sstabellini@...nel.org, konrad.wilk@...cle.com,
        roger.pau@...rix.com, axboe@...nel.dk, davem@...emloft.net,
        rjw@...ysocki.net, len.brown@...el.com, pavel@....cz,
        peterz@...radead.org, eduval@...zon.com, sblbir@...zon.com,
        xen-devel@...ts.xenproject.org, vkuznets@...hat.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        dwmw@...zon.co.uk, benh@...nel.crashing.org
Subject: Re: [PATCH v3 00/11] Fix PM hibernation in Xen guests


On 8/21/20 6:22 PM, Anchal Agarwal wrote:
>
> Known issues:
> 1.KASLR causes intermittent hibernation failures. VM fails to resumes and
> has to be restarted. I will investigate this issue separately and shouldn't
> be a blocker for this patch series.


Is there any change in status for this? This has been noted since January.


-boris


> 2. During hibernation, I observed sometimes that freezing of tasks fails due
> to busy XFS workqueuei[xfs-cil/xfs-sync]. This is also intermittent may be 1
> out of 200 runs and hibernation is aborted in this case. Re-trying hibernation
> may work. Also, this is a known issue with hibernation and some
> filesystems like XFS has been discussed by the community for years with not an
> effectve resolution at this point.
>