From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: Tadeusz Struk <tadeusz.struk-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: Dennis Dalessandro
<dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Dean Luick <dean.luick-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH v2 03/12] IB/hfi1: Fix an Oops on pci device force remove
Date: Tue, 25 Oct 2016 12:03:45 -0600 [thread overview]
Message-ID: <20161025180345.GA16794@obsidianresearch.com> (raw)
In-Reply-To: <7f4cbe0c-0c83-48b2-9901-4a5e27b306b4-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
On Tue, Oct 25, 2016 at 10:38:55AM -0700, Tadeusz Struk wrote:
> On 10/25/2016 09:48 AM, Jason Gunthorpe wrote:
> > nit: This isn't similar to uverbs or other IB core interfaces - they
> > all allow unbind while the FD remains open, this forces the FD to
> > become closed - which means hot plug will not be supported by hfi1.
> >
>
> That's correct, the reason, as I said before, is that PIO processes
> don't go via FD, but talk directly to MMIO PCI regions.
Most of the IB drivers do this - Mellanox implemented a forced
remapping of the user space VMA on unplug to deal with it, you can use
that technique in HFI1 too.
Jason
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next prev parent reply other threads:[~2016-10-25 18:03 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-17 11:19 [PATCH 00/12] For 4.9 rc Dennis Dalessandro
[not found] ` <20161017103326.7934.21558.stgit-9QXIwq+3FY+1XWohqUldA0EOCMrvLtNR@public.gmane.org>
2016-10-17 11:19 ` [PATCH 01/12] IB/rdmvat: Organize hot path calldowns into a single cacheline Dennis Dalessandro
2016-10-17 11:19 ` [PATCH 02/12] IB/hfi1: Optimize pio cachelines Dennis Dalessandro
2016-10-17 11:19 ` [PATCH 03/12] IB/hfi1: Fix an Oops on pci device force remove Dennis Dalessandro
[not found] ` <20161017111918.7934.72325.stgit-9QXIwq+3FY+1XWohqUldA0EOCMrvLtNR@public.gmane.org>
2016-10-17 16:07 ` Jason Gunthorpe
[not found] ` <20161017160731.GA5679-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-10-19 18:01 ` Tadeusz Struk
2016-10-25 15:57 ` [PATCH v2 " Dennis Dalessandro
[not found] ` <20161025155754.4950.23412.stgit-9QXIwq+3FY+1XWohqUldA0EOCMrvLtNR@public.gmane.org>
2016-10-25 16:48 ` Jason Gunthorpe
[not found] ` <20161025164851.GA28096-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-10-25 17:38 ` Tadeusz Struk
[not found] ` <7f4cbe0c-0c83-48b2-9901-4a5e27b306b4-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-10-25 18:03 ` Jason Gunthorpe [this message]
2016-10-17 11:19 ` [PATCH 04/12] IB/hfi1: Return ENODEV for unsupported PCI device ids Dennis Dalessandro
2016-10-17 11:19 ` [PATCH 05/12] IB/hfi1: Unify access to GUID entries Dennis Dalessandro
2016-10-17 11:19 ` [PATCH 06/12] IB/hfi1: Optimize devdata cachelines Dennis Dalessandro
2016-10-17 11:19 ` [PATCH 07/12] IB/hfi1: Fix a potential memory leak in hfi1_create_ctxts() Dennis Dalessandro
2016-10-17 11:19 ` [PATCH 08/12] IB/hfi1: Add active channel and backplane support for integrated devices Dennis Dalessandro
2016-10-17 11:19 ` [PATCH 09/12] IB/hfi1: Remove leftover snoop references Dennis Dalessandro
2016-10-17 11:19 ` [PATCH 10/12] IB/hfi1: Clean up unused argument Dennis Dalessandro
2016-10-17 11:20 ` [PATCH 11/12] IB/hfi1: Delete unused lock Dennis Dalessandro
2016-10-17 11:20 ` [PATCH 12/12] IB/hfi1: Fix rnr_timer addition Dennis Dalessandro
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