From: Christoph Hellwig <hch@lst.de>
To: Serge Belyshev <belyshev@depni.sinp.msu.ru>
Cc: Christoph Hellwig <hch@lst.de>,
Andrew Morton <akpm@linux-foundation.org>,
Jani Nikula <jani.nikula@linux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Daniel Vetter <daniel.vetter@ffwll.ch>,
intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
Chris Wilson <chris@chris-wilson.co.uk>,
linux-mm@kvack.org
Subject: Re: [PATCH 4/4] i915: fix remap_io_sg to verify the pgprot
Date: Mon, 17 May 2021 15:11:37 +0200 [thread overview]
Message-ID: <20210517131137.GA19451@lst.de> (raw)
In-Reply-To: <87lf8dik15.fsf@depni.sinp.msu.ru>
On Mon, May 17, 2021 at 04:09:42PM +0300, Serge Belyshev wrote:
> Christoph Hellwig <hch@lst.de> writes:
>
> > As an ad-hoc experiment: can you replace the call to remap_pfn_range
> > with remap_pfn_range_notrack (and export it if you build i915 modular)
> > in remap_io_sg and see if that makes any difference?
>
> That worked, thanks -- no artifacts seen.
Looks like it is caused by the validation failure then. Which means the
existing code is doing something wrong in its choice of the page
protection bit. I really need help from the i915 maintainers here..
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Serge Belyshev <belyshev@depni.sinp.msu.ru>
Cc: Peter Zijlstra <peterz@infradead.org>,
Daniel Vetter <daniel.vetter@ffwll.ch>,
intel-gfx@lists.freedesktop.org,
Chris Wilson <chris@chris-wilson.co.uk>,
linux-mm@kvack.org, dri-devel@lists.freedesktop.org,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [Intel-gfx] [PATCH 4/4] i915: fix remap_io_sg to verify the pgprot
Date: Mon, 17 May 2021 15:11:37 +0200 [thread overview]
Message-ID: <20210517131137.GA19451@lst.de> (raw)
In-Reply-To: <87lf8dik15.fsf@depni.sinp.msu.ru>
On Mon, May 17, 2021 at 04:09:42PM +0300, Serge Belyshev wrote:
> Christoph Hellwig <hch@lst.de> writes:
>
> > As an ad-hoc experiment: can you replace the call to remap_pfn_range
> > with remap_pfn_range_notrack (and export it if you build i915 modular)
> > in remap_io_sg and see if that makes any difference?
>
> That worked, thanks -- no artifacts seen.
Looks like it is caused by the validation failure then. Which means the
existing code is doing something wrong in its choice of the page
protection bit. I really need help from the i915 maintainers here..
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next prev parent reply other threads:[~2021-05-17 13:11 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-26 5:55 add remap_pfn_range_notrack instead of reinventing it in i915 v2 Christoph Hellwig
2021-03-26 5:55 ` [Intel-gfx] " Christoph Hellwig
2021-03-26 5:55 ` [PATCH 1/4] mm: add remap_pfn_range_notrack Christoph Hellwig
2021-03-26 5:55 ` [Intel-gfx] " Christoph Hellwig
2021-03-26 5:55 ` [PATCH 2/4] mm: add a io_mapping_map_user helper Christoph Hellwig
2021-03-26 5:55 ` [Intel-gfx] " Christoph Hellwig
2021-10-20 15:40 ` Lucas De Marchi
2021-10-20 19:37 ` Peter Zijlstra
2021-10-21 6:18 ` Christoph Hellwig
2021-03-26 5:55 ` [PATCH 3/4] i915: use io_mapping_map_user Christoph Hellwig
2021-03-26 5:55 ` [Intel-gfx] " Christoph Hellwig
2021-03-26 5:55 ` [PATCH 4/4] i915: fix remap_io_sg to verify the pgprot Christoph Hellwig
2021-03-26 5:55 ` [Intel-gfx] " Christoph Hellwig
2021-05-08 19:33 ` youling257
2021-05-08 19:33 ` youling257
2021-05-08 19:33 ` youling257
2021-05-10 8:58 ` Christoph Hellwig
2021-05-10 8:58 ` Christoph Hellwig
2021-05-16 16:06 ` Serge Belyshev
2021-05-16 16:06 ` [Intel-gfx] " Serge Belyshev
2021-05-16 16:06 ` Serge Belyshev
2021-05-17 12:37 ` Christoph Hellwig
2021-05-17 12:37 ` [Intel-gfx] " Christoph Hellwig
2021-05-17 13:09 ` Serge Belyshev
2021-05-17 13:09 ` [Intel-gfx] " Serge Belyshev
2021-05-17 13:09 ` Serge Belyshev
2021-05-17 13:11 ` Christoph Hellwig [this message]
2021-05-17 13:11 ` [Intel-gfx] " Christoph Hellwig
2021-05-17 17:06 ` Matthew Auld
2021-05-17 17:06 ` Matthew Auld
2021-05-17 17:06 ` Matthew Auld
2021-05-18 13:21 ` Christoph Hellwig
2021-05-18 13:21 ` Christoph Hellwig
2021-05-18 15:00 ` Matthew Auld
2021-05-18 15:00 ` Matthew Auld
2021-05-18 15:00 ` Matthew Auld
2021-05-19 5:46 ` Thomas Hellström (Intel)
2021-05-19 5:46 ` Thomas Hellström (Intel)
2021-05-17 21:46 ` Thomas Hellström
2021-05-17 21:46 ` Thomas Hellström
2021-05-17 21:46 ` Thomas Hellström
2021-05-18 6:46 ` Thomas Hellström
2021-05-18 6:46 ` Thomas Hellström
2021-05-18 6:46 ` Thomas Hellström
2021-05-18 13:24 ` Christoph Hellwig
2021-05-18 13:24 ` Christoph Hellwig
2021-05-18 13:33 ` Thomas Hellström
2021-05-18 13:33 ` Thomas Hellström
2021-05-18 13:33 ` Thomas Hellström
2021-05-18 13:23 ` Christoph Hellwig
2021-05-18 13:23 ` Christoph Hellwig
2021-05-19 5:51 ` Thomas Hellström
2021-05-19 5:51 ` Thomas Hellström
2021-05-19 5:51 ` Thomas Hellström
2021-03-26 7:28 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for series starting with [1/4] mm: add remap_pfn_range_notrack Patchwork
2021-03-26 7:31 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2021-03-26 7:34 ` [Intel-gfx] ✗ Fi.CI.DOCS: " Patchwork
2021-03-26 7:59 ` [Intel-gfx] ✗ Fi.CI.BAT: failure " Patchwork
2021-04-08 10:36 ` add remap_pfn_range_notrack instead of reinventing it in i915 v2 Daniel Vetter
2021-04-08 10:36 ` [Intel-gfx] " Daniel Vetter
2021-04-08 10:36 ` Daniel Vetter
2021-04-08 11:28 ` Christoph Hellwig
2021-04-08 11:28 ` [Intel-gfx] " Christoph Hellwig
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