From: Jason Gunthorpe <jgg@nvidia.com>
To: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Cc: linux-rdma@vger.kernel.org,
Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>,
stable@vger.kernel.org
Subject: Re: [PATCH for-rc] IB/hfi1: Insure preempt is held across smp_processor_id
Date: Tue, 4 Jan 2022 10:30:48 -0400 [thread overview]
Message-ID: <20220104143048.GA2678196@nvidia.com> (raw)
In-Reply-To: <20211213141119.177982.15684.stgit@awfm-01.cornelisnetworks.com>
On Mon, Dec 13, 2021 at 09:11:19AM -0500, Dennis Dalessandro wrote:
> From: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
>
> Despite the patch noted below, the warning still happens with
> certain kernel configs.
>
> It appears that either check_preemption_disabled() is inconsistent with
> with debug_rcu_read_lock() or the patch incorrectly assumes that an RCU
> critical section will prevent the current cpu from changing.
>
> A clarification has been solicited via:
> https://lore.kernel.org/linux-rdma/CH0PR01MB71536FB1BD5ECF16E65CB3BFF26F9@CH0PR01MB7153.prod.exchangelabs.com/T/#u
Did nobody answer your thread asking about this?
Jason
next prev parent reply other threads:[~2022-01-04 14:30 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-13 14:11 [PATCH for-rc] IB/hfi1: Insure preempt is held across smp_processor_id Dennis Dalessandro
2022-01-04 14:30 ` Jason Gunthorpe [this message]
2022-01-04 14:31 ` Marciniszyn, Mike
2022-01-05 17:45 ` Jason Gunthorpe
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