From: Jason Gunthorpe <jgg@nvidia.com>
To: Dean Luick <dean.luick@cornelisnetworks.com>
Cc: linux-rdma@vger.kernel.org
Subject: Re: FIXME in hfi1/user_exp_rcv.c
Date: Thu, 13 Oct 2022 10:21:07 -0300 [thread overview]
Message-ID: <Y0gQwwaHGq2Uj5f/@nvidia.com> (raw)
In-Reply-To: <c56dbce1-7d63-df20-fd2c-577ca103d8de@cornelisnetworks.com>
On Thu, Oct 13, 2022 at 07:59:52AM -0500, Dean Luick wrote:
> Hi Jason,
>
> I am looking at the FIXME you left in hfi1/user_exp_rcv.c with git commit 3889551db212
>
> Link: https://lore.kernel.org/r/20191112202231.3856-7-jgg@ziepe.ca
>
> Can you please explain in more detail what made you add the FIXME and what may be "racy"?
The comment seems self explanatory, the ordering is upposed to have
mmu_interval_read_begin() done before the page tables are read, not
after - since we already have a page list at this point it can't be
right.
Jason
next prev parent reply other threads:[~2022-10-13 13:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-13 12:59 FIXME in hfi1/user_exp_rcv.c Dean Luick
2022-10-13 13:21 ` Jason Gunthorpe [this message]
2022-10-13 13:48 ` Dennis Dalessandro
2022-10-14 13:08 ` Jason Gunthorpe
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