Re: [PATCH v7 9/9] swiotlb: search the software IO TLB only if the device makes use of it

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To: Petr Tesařík <petr@xxxxxxxxxxx>
Subject: Re: [PATCH v7 9/9] swiotlb: search the software IO TLB only if the device makes use of it
From: Christoph Hellwig <hch@xxxxxx>
Date: Fri, 8 Sep 2023 10:00:31 +0200
Cc: Jonathan Corbet <corbet@xxxxxxx>, Petr Tesarik <petrtesarik@xxxxxxxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Russell King <linux@xxxxxxxxxxxxxxx>, Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, "Rafael J. Wysocki" <rafael@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, Christoph Lameter <cl@xxxxxxxxx>, Pekka Enberg <penberg@xxxxxxxxxx>, David Rientjes <rientjes@xxxxxxxxxx>, Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Roman Gushchin <roman.gushchin@xxxxxxxxx>, Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx>, Petr Tesarik <petr.tesarik.ext@xxxxxxxxxx>, Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>, Hans de Goede <hdegoede@xxxxxxxxxx>, James Seo <james@xxxxxxxxxx>, James Clark <james.clark@xxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, "moderated list:XEN HYPERVISOR ARM" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "moderated list:ARM PORT" <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>, open list <linux-kernel@xxxxxxxxxxxxxxx>, "open list:MIPS" <linux-mips@xxxxxxxxxxxxxxx>, "open list:XEN SWIOTLB SUBSYSTEM" <iommu@xxxxxxxxxxxxxxx>, "open list:SLAB ALLOCATOR" <linux-mm@xxxxxxxxx>, Roberto Sassu <roberto.sassu@xxxxxxxxxxxxxxx>
In-reply-to: <20230907131223.587c1a88@meshulam.tesarici.cz>
References: <cover.1690871004.git.petr.tesarik.ext@huawei.com> <adea71bd1fa8660d4c3157a562431ad8127016d4.1690871004.git.petr.tesarik.ext@huawei.com> <87a5uz3ob8.fsf@meer.lwn.net> <87il8wr348.fsf@meer.lwn.net> <20230907131223.587c1a88@meshulam.tesarici.cz>
User-agent: Mutt/1.5.17 (2007-11-01)

On Thu, Sep 07, 2023 at 01:12:23PM +0200, Petr Tesařík wrote:
> Hi all,
> 
> sorry for my late reply; I've been away from my work setup for a
> month...

Please take a look at:

https://lore.kernel.org/linux-iommu/20230905064441.127588-1-hch@xxxxxx/T/#u

References:
- [PATCH v7 0/9] Allow dynamic allocation of software IO TLB bounce buffers
  - From: Petr Tesarik
- [PATCH v7 9/9] swiotlb: search the software IO TLB only if the device makes use of it
  - From: Petr Tesarik
- Re: [PATCH v7 9/9] swiotlb: search the software IO TLB only if the device makes use of it
  - From: Jonathan Corbet
- Re: [PATCH v7 9/9] swiotlb: search the software IO TLB only if the device makes use of it
  - From: Jonathan Corbet
- Re: [PATCH v7 9/9] swiotlb: search the software IO TLB only if the device makes use of it
  - From: Petr Tesařík

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