From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: Date: Mon, 28 Nov 2016 11:22:08 +0100 From: Lukas Wunner To: Wei Zhang Cc: Bjorn Helgaas , Keith Busch , "linux-pci@vger.kernel.org" Subject: Re: [PATCHv4 next 0/3] Limiting pci access Message-ID: <20161128102208.GA4072@wunner.de> References: <1477695497-6207-1-git-send-email-keith.busch@intel.com> <20161118232544.GI28386@localhost.localdomain> <20161123160906.GB16033@bhelgaas-glaptop.roam.corp.google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: List-ID: On Mon, Nov 28, 2016 at 09:14:39AM +0000, Wei Zhang wrote: > The series of changes made by Keith are to support the PCIe hot plug > testing on our Lightning platform (Thanks Keith!). Lightning is a > "Just of Bunch of Flash", or JBOF, storage platform that has a PCIe > switch connecting to 15 NVMe SSDs. Are the hotplug ports on this switch capable of D3hot? There's a series queued up for 4.10 which will suspend hotplug ports to D3hot when nothing is connected. I cc'ed Keith when I posted it, but I forgot to cc you: https://www.spinics.net/lists/linux-pci/msg55564.html If you haven't tested this series so far, now would be a good time to do so, as it would allow fixing regressions (if any) before 4.10 is out. Note that this series might save you quite a bit of power if you have lots of unused ports. You can fetch the patches from: https://github.com/l1k/linux/commits/pcie_port_pm_v2 Thanks, Lukas