linux-kernel - Re: [git pull] IOMMU Updates for Linux v5.20

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Message-ID: <Yu7PBwJy8LbI/aTs@8bytes.org>
Date:   Sat, 6 Aug 2022 22:28:55 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Will Deacon <will@...nel.org>, linux-kernel@...r.kernel.org,
        iommu@...ts.linux.dev
Subject: Re: [git pull] IOMMU Updates for Linux v5.20

On Sat, Aug 06, 2022 at 12:39:54PM -0700, Linus Torvalds wrote:
> I'm currently bisecting a boot failure on my desktop, and it's gone
> into the iommu code.
> 
> I'm assuming it's the 64-bit thing, but I'll bisect further to make sure.
> 
> If it is, it will be reverted as hopelessly optimistic.

A faster way to track down whether this change causes the boot failures
on your machine is to boot with iommu.forcedac=0 to disable the new
behavior and see if the issue goes away.

Please let me know if I can help with anything.

Regards,

	Joerg