Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Mon, 22 May 2023 16:38:18 +0530
From:   Srikar Dronamraju <srikar@linux.vnet.ibm.com>
To:     Michael Ellerman <mpe@ellerman.id.au>
Cc:     Alexey Kardashevskiy <aik@ozlabs.ru>,
        "Linux regression tracking (Thorsten Leemhuis)" 
        <regressions@leemhuis.info>, Nicholas Piggin <npiggin@gmail.com>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
        sachinp@linux.vnet.ibm.com,
        Abdul Haleem <abdhalee@linux.vnet.ibm.com>,
        Gaurav Batra <gbatra@linux.vnet.ibm.com>,
        Linux kernel regressions list <regressions@lists.linux.dev>
Subject: Re: Probing nvme disks fails on Upstream kernels on powerpc Maxconfig
Message-ID: <20230522110818.GB3902@linux.vnet.ibm.com>
Reply-To: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
References: <20230323095333.GI1005120@linux.vnet.ibm.com>
 <906d4d0e-b487-00a5-9399-7d1edc5e20a4@leemhuis.info>
 <87bkk2khl0.fsf@mpe.ellerman.id.au>
 <2a80cb20-0c9f-2d0c-e951-c4f005f3e4b3@ozlabs.ru>
 <20230522072412.GA3902@linux.vnet.ibm.com>
 <87edn8ak4d.fsf@mail.lhotse>
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
In-Reply-To: <87edn8ak4d.fsf@mail.lhotse>
MIME-Version: 1.0
Precedence: bulk

* Michael Ellerman <mpe@ellerman.id.au> [2023-05-22 17:41:22]:

> Srikar Dronamraju <srikar@linux.vnet.ibm.com> writes:
> > * Alexey Kardashevskiy <aik@ozlabs.ru> [2023-04-13 22:09:22]:
> >
> >> > > On 23.03.23 10:53, Srikar Dronamraju wrote:
> >> > > > 
> > Hi Alexey, Michael
> >
> > Sorry for the late reply, but I didnt have access to this large system.
> > This weekend, I did get access and tested with the patch. However it didn't
> > help much, system is still stuck at dracut with similar message except the
> > trace.
> >
> > However this patch
> > https://lore.kernel.org/all/20230418204401.13168-1-gbatra@linux.vnet.ibm.com/
> > from Gaurav Batra does solve this issue.
> 
> Thanks.
> 
> There was a v3 of that patch:
>   https://lore.kernel.org/all/20230504175913.83844-1-gbatra@linux.vnet.ibm.com/
> 
> Which is merged now into mainline as:
>   096339ab84f3 ("powerpc/iommu: DMA address offset is incorrectly calculated with 2MB TCEs")
> 
> Presumably it also fixes the bug for you, so I'll mark this as fixed,
> but if you can test that exact commit that would be good to confirm the
> bug is fixed in mainline.
> 

Yes verified with mainline kernel and also with the v3.
This patch/commit does fix it.

-- 
Thanks and Regards
Srikar Dronamraju