linux-kernel - Re: [PATCH 1/1] iommu: Avoid races around default domain allocations

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Message-ID: <9ba9c4fa-3fa9-c6c4-ce77-0c6cd5e23680@quicinc.com>
Date: Wed, 7 Feb 2024 19:56:25 +0530
From: Nikhil V <quic_nprakash@...cinc.com>
To: Jason Gunthorpe <jgg@...pe.ca>
CC: Will Deacon <will@...nel.org>, Joerg Roedel <joro@...tes.org>,
        "Robin
 Murphy" <robin.murphy@....com>,
        Charan Teja Kalla
	<quic_charante@...cinc.com>,
        <iommu@...ts.linux.dev>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] iommu: Avoid races around default domain allocations

On 2/1/2024 9:53 PM, Jason Gunthorpe wrote:
> On Mon, Jan 29, 2024 at 01:29:12PM +0530, Nikhil V wrote:
> 
>> Gentle ping to have your valuable feedback. This fix is helping us
>> downstream without which we see a bunch of kernel crashes.
> 
> What are you expecting here? This was fixed in Linus's tree some time
> ago now
> 
> Are you asking for the stable team to put something weird in 6.1? I
> don't think they generally do that?
> 
> Jason

Hi @Jason,

Considering that the issue is reported on 6.1, which is an __LTS 
kernel__, any suggestion to fix this issue cleanly would help us a lot. 
Right thing here would have been propagating the changes from 6.6 (like 
for any stability issue), but considering the intrusiveness of them, is 
it even possible?

Just to be open about reproducibility of the issue, a bunch of them are 
reported, both internally and by customers.

Thanks
Nikhil V