From: Keith Busch <keith.busch@intel.com>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Alexandru Gagniuc <mr.nuke.me@gmail.com>,
linux-pci@vger.kernel.org, alex_gagniuc@dellteam.com,
austin_bolen@dell.com, shyam_iyer@dell.com,
linux-kernel@vger.kernel.org,
Jonathan Derrick <jonathan.derrick@intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Lukas Wunner <lukas@wunner.de>,
Russell Currey <ruscur@russell.cc>,
Sam Bobroff <sbobroff@linux.ibm.com>,
Oliver O'Halloran <oohall@gmail.com>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v2] PCI/MSI: Don't touch MSI bits when the PCI device is disconnected
Date: Thu, 8 Nov 2018 14:49:00 -0700 [thread overview]
Message-ID: <20181108214900.GB2932@localhost.localdomain> (raw)
In-Reply-To: <20181108200855.GE41183@google.com>
On Thu, Nov 08, 2018 at 02:09:17PM -0600, Bjorn Helgaas wrote:
>
> I'm having second thoughts about this. One thing I'm uncomfortable
> with is that sprinkling pci_dev_is_disconnected() around feels ad hoc
> instead of systematic, in the sense that I don't know how we convince
> ourselves that this (and only this) is the correct place to put it.
You know how the kernel provides ZERO_PAGE, wouldn't it be cool if we
also had a ONES_PAGE and could remap all virtual addresses from a memory
mapped device to that page on an ungraceful disconnect? I do not know
how to accomplish that, so might just be crazy talk... But if it is
possible, that would be a pretty nifty way to solve this problem.
next prev parent reply other threads:[~2018-11-08 21:52 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-18 22:15 [PATCH v2] PCI/MSI: Don't touch MSI bits when the PCI device is disconnected Alexandru Gagniuc
2018-11-06 0:32 ` Alex G.
2018-11-07 17:04 ` Derrick, Jonathan
2018-11-07 23:42 ` Bjorn Helgaas
2018-11-08 20:09 ` Bjorn Helgaas
2018-11-08 21:49 ` Keith Busch [this message]
2018-11-08 22:01 ` Greg Kroah-Hartman
2018-11-08 22:32 ` Keith Busch
2018-11-08 22:42 ` Greg Kroah-Hartman
2018-11-08 22:49 ` Alex_Gagniuc
2018-11-08 22:51 ` Greg KH
2018-11-08 23:06 ` Alex_Gagniuc
2018-11-12 5:49 ` Oliver O'Halloran
2018-11-12 20:05 ` Alex_Gagniuc
2018-11-13 5:02 ` Bjorn Helgaas
2018-11-13 22:39 ` Alex_Gagniuc
2018-11-13 22:52 ` Keith Busch
2018-11-14 0:31 ` Alex_Gagniuc
2018-11-14 5:59 ` Bjorn Helgaas
2018-11-14 19:22 ` Alex_Gagniuc
2018-11-14 19:41 ` Derrick, Jonathan
2018-11-14 20:23 ` Keith Busch
2018-11-14 20:52 ` Alex_Gagniuc
2018-11-14 20:58 ` Keith Busch
2018-11-15 6:24 ` Bjorn Helgaas
2018-11-16 0:19 ` Alex_Gagniuc
2018-11-08 23:03 ` Keith Busch
2018-11-09 7:29 ` Lukas Wunner
2018-11-09 11:32 ` Greg Kroah-Hartman
2018-11-09 16:36 ` Keith Busch
2018-11-08 22:20 ` Alex_Gagniuc
2018-11-09 7:11 ` Lukas Wunner
2018-11-12 5:48 ` Oliver O'Halloran
2018-12-27 19:28 ` Alex_Gagniuc
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