linux-kernel - Re: Regression when booting 5.15 as dom0 on arm64 (WAS: Re: [linux-linus test] 161829: regressions

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Date:   Tue, 11 May 2021 18:49:33 +0200
From:   Christoph Hellwig <hch@....de>
To:     Stefano Stabellini <sstabellini@...nel.org>
Cc:     Christoph Hellwig <hch@....de>, Julien Grall <julien@....org>,
        f.fainelli@...il.com,
        "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        linux-kernel@...r.kernel.org,
        osstest service owner <osstest-admin@...project.org>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        iommu@...ts.linux-foundation.org
Subject: Re: Regression when booting 5.15 as dom0 on arm64 (WAS: Re:
 [linux-linus test] 161829: regressions - FAIL)]

On Tue, May 11, 2021 at 09:47:33AM -0700, Stefano Stabellini wrote:
> That's a much better plan. It is also not super urgent, so maybe for now
> we could add an explicit check for io_tlb_default_mem != NULL at the
> beginning of xen_swiotlb_init? So that at least we can fail explicitly
> or ignore it explicitly rather than by accident.

Fine with me.  Do you want to take over from here and test and submit
your version?