From: Andrew Morton <akpm@linux-foundation.org>
To: <ankita@nvidia.com>
Cc: <jgg@nvidia.com>, <alex.williamson@redhat.com>,
<tony.luck@intel.com>, <bp@alien8.de>, <naoya.horiguchi@nec.com>,
<linmiaohe@huawei.com>, <aniketa@nvidia.com>, <cjia@nvidia.com>,
<kwankhede@nvidia.com>, <targupta@nvidia.com>,
<vsethi@nvidia.com>, <acurrid@nvidia.com>,
<anuaggarwal@nvidia.com>, <linux-kernel@vger.kernel.org>,
<linux-mm@kvack.org>, <linux-edac@vger.kernel.org>,
<kvm@vger.kernel.org>
Subject: Re: [PATCH v1 0/4] mm: Implement ECC handling for pfn with no struct page
Date: Wed, 20 Sep 2023 09:02:22 -0700 [thread overview]
Message-ID: <20230920090222.580f2b3ca43f21f752c10e0a@linux-foundation.org> (raw)
In-Reply-To: <20230920140210.12663-1-ankita@nvidia.com>
On Wed, 20 Sep 2023 19:32:06 +0530 <ankita@nvidia.com> wrote:
> The kernel MM currently handles ECC errors / poison only on memory page
> backed by struct page. As part of [1], the nvgrace-gpu-vfio-pci module
> maps the device memory to user VA (Qemu) using remap_pfn_range without
> being added to the kernel. These pages are not backed by struct page.
Are you able to identify any other drivers which can (or will) use
this? Or is it likely that this feature will only ever be for
nvgrace-gpu-vfio-pci?
next prev parent reply other threads:[~2023-09-20 16:02 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-20 14:02 ankita
2023-09-20 14:02 ` [PATCH v1 1/4] mm: handle poisoning of pfn without struct pages ankita
2023-09-23 3:20 ` Miaohe Lin
2023-09-25 12:36 ` Jason Gunthorpe
2023-09-26 7:23 ` Naoya Horiguchi
2023-09-20 14:02 ` [PATCH v1 2/4] mm: Add poison error check in fixup_user_fault() for mapped pfn ankita
2023-09-20 14:02 ` [PATCH v1 3/4] mm: Change ghes code to allow poison of non-struct pfn ankita
2023-09-20 14:02 ` [PATCH v1 4/4] vfio/nvgpu: register device memory for poison handling ankita
2023-09-26 5:36 ` kernel test robot
2023-09-26 7:38 ` Naoya Horiguchi
2023-09-28 19:45 ` Alex Williamson
2023-09-20 16:02 ` Andrew Morton [this message]
2023-09-20 16:04 ` [PATCH v1 0/4] mm: Implement ECC handling for pfn with no struct page Jason Gunthorpe
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