linux-kernel - Re: [RFC PATCH 0/4] Allow Link state changes for Hot-Plug

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Message-ID: <CADTPrLS9iyvDkTLV5YyzJCiuGT2G0kTSbea8ZXzzT=E9RP71-Q@mail.gmail.com>
Date:	Thu, 21 Nov 2013 05:16:26 -0800
From:	Rajat Jain <rajatjain.linux@...il.com>
To:	Linux-PCI <linux-pci@...r.kernel.org>,
	Linux-hotplug <linux-hotplug@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	Yijing Wang <wangyijing@...wei.com>,
	Paul Bolle <pebolle@...cali.nl>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Rajat Jain <rajatjain.linux@...il.com>,
	Rajat Jain <rajatjain@...iper.net>,
	Guenter Roeck <groeck@...iper.net>
Subject: Re: [RFC PATCH 0/4] Allow Link state changes for Hot-Plug

Hello Bjorn / Folks,

Was wondering if you got a chance to look at this patchset?

Thanks & Best Regards,

Rajat Jain

On Tue, Nov 19, 2013 at 2:39 PM, Rajat Jain <rajatjain.linux@...il.com> wrote:
>
> Hello,
>
> This patch set enables the use of PCI Express link up and link down events
> for Hotplug or Unplug. The requirement of such a feature was originally
> discussed here:
>
> http://www.spinics.net/lists/linux-pci/msg05783.html
> http://www.spinics.net/lists/hotplug/msg05801.html
>
> Patch [1/4]: makes a function non-static for use by patch 2.
> Patch [2/4]: Contains the bulk logic to allow link events to be used
>              for hotplug and removal.
> Patch [3/4]: Makes the pciehp_power_thread() lock free by making it
>              look at a work info->req instead of slot->state.
> Patch [4/4]: Introduce slot->hotplug_lock to serialize the hotplug
>              operations.
>
> I'd appreciate if you could please review and provide me with any comments.
>
> Thanks,
>
> Rajat
>
> Rajat Jain (4):
>   pciehp: Make check_link_active() non-static
>   pciehp: Use link state change notifications for hot-plug and removal
>   pciehp: Ensure all hotplug events are processed, even very fast ones.
>   pciehp: Introduce hotplug_lock to serialize HP events on each slot
>
>  drivers/pci/hotplug/pciehp.h      |    6 ++
>  drivers/pci/hotplug/pciehp_core.c |   10 +-
>  drivers/pci/hotplug/pciehp_ctrl.c |  181 ++++++++++++++++++++++++++++++++++---
>  drivers/pci/hotplug/pciehp_hpc.c  |   63 +++++++++----
>  4 files changed, 229 insertions(+), 31 deletions(-)
>
> --
> 1.7.9.5
>
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