Re: [PATCH 09/15] swiotlb: make the swiotlb_init interface more useful

To: Nathan Chancellor <nathan@xxxxxxxxxx>
Subject: Re: [PATCH 09/15] swiotlb: make the swiotlb_init interface more useful
From: Christoph Hellwig <hch@xxxxxx>
Date: Wed, 1 Jun 2022 19:34:41 +0200
Cc: Christoph Hellwig <hch@xxxxxx>, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, x86@xxxxxxxxxx, Anshuman Khandual <anshuman.khandual@xxxxxxx>, Tom Lendacky <thomas.lendacky@xxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, David Woodhouse <dwmw2@xxxxxxxxxxxxx>, Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-hyperv@xxxxxxxxxxxxxxx, tboot-devel@xxxxxxxxxxxxxxxxxxxxx, linux-pci@xxxxxxxxxxxxxxx
In-reply-to: <YpehC7BwBlnuxplF@dev-arch.thelio-3990X>
References: <20220404050559.132378-1-hch@lst.de> <20220404050559.132378-10-hch@lst.de> <YpehC7BwBlnuxplF@dev-arch.thelio-3990X>
User-agent: Mutt/1.5.17 (2007-11-01)

Can you send me the full dmesg and the content of
/sys/kernel/debug/swiotlb/io_tlb_nslabs for a good and a bad boot?

Thanks!

References:
- cleanup swiotlb initialization v8
  - From: Christoph Hellwig
- [PATCH 09/15] swiotlb: make the swiotlb_init interface more useful
  - From: Christoph Hellwig
- Re: [PATCH 09/15] swiotlb: make the swiotlb_init interface more useful
  - From: Nathan Chancellor