From: Jason Gunthorpe <jgg@nvidia.com>
To: Junxian Huang <huangjunxian6@hisilicon.com>
Cc: leon@kernel.org, linux-rdma@vger.kernel.org, linuxarm@huawei.com,
linux-kernel@vger.kernel.org, tangchengchang@huawei.com
Subject: Re: [PATCH for-next] RDMA/hns: Support mmapping reset state to userspace
Date: Mon, 9 Dec 2024 15:01:25 -0400 [thread overview]
Message-ID: <20241209190125.GA2367762@nvidia.com> (raw)
In-Reply-To: <20241014130731.1650279-1-huangjunxian6@hisilicon.com>
On Mon, Oct 14, 2024 at 09:07:31PM +0800, Junxian Huang wrote:
> From: Chengchang Tang <tangchengchang@huawei.com>
>
> Mmap reset state to notify userspace about HW reset. The mmaped flag
> hw_ready will be initiated to a non-zero value. When HW is reset,
> the mmap page will be zapped and userspace will get a zero value of
> hw_ready.
This needs alot more explanation about *why* does userspace need this
information and why is hns unique here.
Usually when the HW is reset there are enough existing system calls
that will start failing that a driver should not need to do something
like this.
Jason
next prev parent reply other threads:[~2024-12-09 19:01 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-14 13:07 [PATCH for-next] RDMA/hns: Support mmapping reset state to userspace Junxian Huang
2024-11-04 8:31 ` Leon Romanovsky
2024-12-09 19:01 ` Jason Gunthorpe [this message]
2024-12-10 6:24 ` Junxian Huang
2024-12-10 13:48 ` Jason Gunthorpe
2024-12-13 9:37 ` Junxian Huang
2024-12-13 12:49 ` Jason Gunthorpe
2024-12-17 6:09 ` Junxian Huang
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