From: Jason Gunthorpe <jgg@ziepe.ca>
To: "Christian König" <christian.koenig@amd.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
DRI Development <dri-devel@lists.freedesktop.org>,
Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
Suren Baghdasaryan <surenb@google.com>,
Matthew Wilcox <willy@infradead.org>,
John Stultz <john.stultz@linaro.org>,
Daniel Vetter <daniel.vetter@intel.com>,
Sumit Semwal <sumit.semwal@linaro.org>,
linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org
Subject: Re: [Linaro-mm-sig] Re: [PATCH] dma-buf: Require VM_PFNMAP vma for mmap
Date: Wed, 23 Nov 2022 12:26:49 -0400 [thread overview]
Message-ID: <Y35JyVM/jvYjjDb+@ziepe.ca> (raw)
In-Reply-To: <dcb88724-c68e-6f2a-03d5-0641d2e68ec6@amd.com>
On Wed, Nov 23, 2022 at 04:15:05PM +0100, Christian König wrote:
> I have not the slightest idea how people got this impression, but I have
> heard it so many time from so many different sources that there must be some
> common cause to this. Is the maybe some book or tutorial how to sophisticate
> break the kernel or something like this?
>
> Anyway as far as I can see only correct approach would be to use an MMU
> notifier or more high level hmm_range_fault()+seq number.
It already uses a mmu notifier, this is why I have no idea what the
page ref is doing..
Jason
next prev parent reply other threads:[~2022-11-23 16:27 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-22 17:08 [PATCH] dma-buf: Require VM_PFNMAP vma for mmap Daniel Vetter
2022-11-22 18:03 ` Jason Gunthorpe
2022-11-22 18:08 ` Daniel Vetter
2022-11-22 18:50 ` Jason Gunthorpe
2022-11-22 19:29 ` Daniel Vetter
2022-11-22 19:34 ` Jason Gunthorpe
2022-11-22 19:50 ` Daniel Vetter
2022-11-23 9:06 ` Christian König
2022-11-23 9:30 ` Daniel Vetter
2022-11-23 9:39 ` [Linaro-mm-sig] " Christian König
2022-11-23 10:06 ` Daniel Vetter
2022-11-23 12:46 ` Jason Gunthorpe
2022-11-23 12:49 ` Christian König
2022-11-23 12:53 ` Jason Gunthorpe
2022-11-23 13:12 ` Christian König
2022-11-23 13:28 ` Jason Gunthorpe
2022-11-23 14:28 ` Daniel Vetter
2022-11-23 15:04 ` Jason Gunthorpe
2022-11-23 16:22 ` Daniel Vetter
2022-11-23 14:34 ` Daniel Vetter
2022-11-23 15:08 ` Jason Gunthorpe
2022-11-23 15:15 ` Christian König
2022-11-23 16:26 ` Daniel Vetter
2022-11-23 16:26 ` Jason Gunthorpe [this message]
2022-11-23 8:07 ` Thomas Zimmermann
2022-11-23 9:33 ` Daniel Vetter
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