From: Huan Yang <link@vivo.com>
To: Christoph Hellwig <hch@lst.de>, Gao Xiang <hsiangkao@linux.alibaba.com>
Cc: akpm@linux-foundation.org, bingbu.cao@linux.intel.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
lorenzo.stoakes@oracle.com, opensource.kernel@vivo.com,
rppt@kernel.org, ryan.roberts@arm.com, urezki@gmail.com,
ziy@nvidia.com, vivek.kasireddy@intel.com
Subject: Re: [PATCH] mm/vmalloc: fix mischeck pfn valid in vmap_pfns
Date: Mon, 24 Mar 2025 10:22:23 +0800 [thread overview]
Message-ID: <4ea6e085-8c70-4e6c-a864-55c6c5fa8269@vivo.com> (raw)
In-Reply-To: <20250320053147.GB12560@lst.de>
HI Christoph
Sorry for the later reply.
在 2025/3/20 13:31, Christoph Hellwig 写道:
> As mentioned before udmabuf also has a grave bug in the dma mapping
> part, so just marking it broken would be another very sensible
Could you please provide a more detailed description of this?
I'm not the maintainer, but I see the udmabuf's begin patch mentioned as:
A driver to let userspace turn memfd regions into dma-bufs.
Use case: Allows qemu create dmabufs for the vga framebuffer or
virtio-gpu ressources. Then they can be passed around to display
those guest things on the host. To spice client for classic full
framebuffer display, and hopefully some day to wayland server for
seamless guest window display.
https://patchwork.freedesktop.org/patch/246100/
Did it also mean to do it?
I'd like to learn your thinking
Thank you,
Huan Yang
> option.
next prev parent reply other threads:[~2025-03-24 2:22 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-12 6:15 Huan Yang
2025-03-12 6:18 ` Christoph Hellwig
2025-03-17 2:12 ` Huan Yang
2025-03-17 5:29 ` Bingbu Cao
2025-03-17 5:53 ` Christoph Hellwig
2025-03-17 7:42 ` Huan Yang
2025-03-18 6:48 ` Christoph Hellwig
2025-03-18 8:20 ` Huan Yang
2025-03-18 8:33 ` Christoph Hellwig
2025-03-18 8:39 ` Huan Yang
2025-03-18 8:44 ` Christoph Hellwig
2025-03-18 8:50 ` Huan Yang
[not found] ` <20250319050359.3484-1-hdanton@sina.com>
2025-03-19 8:08 ` Christoph Hellwig
[not found] ` <20250319112651.3502-1-hdanton@sina.com>
2025-03-24 2:13 ` Huan Yang
2025-03-25 6:32 ` Kasireddy, Vivek
2025-03-25 6:46 ` Bingbu Cao
2025-03-27 13:40 ` Matthew Wilcox
2025-03-28 6:13 ` Huan Yang
2025-03-19 9:09 ` Gao Xiang
2025-03-20 5:31 ` Christoph Hellwig
2025-03-24 2:22 ` Huan Yang [this message]
2025-03-24 2:57 ` Matthew Wilcox
2025-03-17 6:26 ` Huan Yang
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