From: Vivek Goyal <vgoyal@in.ibm.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Alexander Nyberg <alexn@dsv.su.se>, Greg KH <greg@kroah.com>,
Amit Gud <gud@eth.net>,
linux-kernel@vger.kernel.org, linux-pci@atrey.karlin.mff.cuni.cz,
akpm@osdl.org, jgarzik@pobox.com, cramerj@intel.com,
USB development list <linux-usb-devel@lists.sourceforge.net>,
Maneesh Soni <maneesh@in.ibm.com>
Subject: Re: [PATCH] PCI: Add pci shutdown ability
Date: Wed, 11 May 2005 11:03:27 +0530 [thread overview]
Message-ID: <20050511053327.GA28791@in.ibm.com> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0504251700560.4896-100000@iolanthe.rowland.org>
> I looked into the possibility of having the PCI core disable interrupt
> generation and DMA on each new device as it is discovered. Unfortunately
> there is no dependable, universal way to do this for IRQs. (A notable gap
> in the original PCI specification, IMHO.)
PCI specification 2.3 onwards, command register bit 10 can be used for
disabling the interrupts from respective device. And the very reason for
introducing this bit seems to be to not allow the device issue interrupts
until a suitable driver for the device has been loaded. Have a look at
following message.
http://www.pcisig.com/reflector/msg05302.html
Probably this feature can be used to disable the interrupts from the devices
and enable these back when respective driver is loaded. This will resolve
the problem of drivers not getting initialized in second kernel due to shared
interrupts in kdump and reliability of capturing dump can be increased.
Thanks
Vivek
next prev parent reply other threads:[~2005-05-11 5:33 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.44L0.0504251128070.5751-100000@iolanthe.rowland.org>
[not found] ` <SVLXCHCON1syWVLEFN00000099e@SVLXCHCON1.enterprise.veritas.com>
[not found] ` <20050425182951.GA23209@kroah.com>
[not found] ` <20050425185113.GC23209@kroah.com>
2005-04-25 19:06 ` [PATCH] PCI: Add pci shutdown ability Greg KH
2005-04-25 19:23 ` Jeff Garzik
2005-04-25 20:07 ` Greg KH
2005-04-25 20:11 ` Adam Belay
2005-04-25 19:45 ` Alexander Nyberg
2005-04-25 20:12 ` Greg KH
2005-04-26 3:59 ` Benjamin Herrenschmidt
2005-04-25 20:14 ` Alan Stern
2005-04-25 20:52 ` Alexander Nyberg
2005-04-25 21:12 ` Alan Stern
2005-04-26 15:49 ` Grant Grundler
2005-04-26 16:04 ` Alan Stern
2005-04-26 16:37 ` Grant Grundler
2005-04-26 17:14 ` Alan Stern
2005-04-26 17:41 ` Grant Grundler
2005-05-11 5:33 ` Vivek Goyal [this message]
2005-05-11 14:38 ` Alan Stern
2005-04-25 21:58 ` Andrew Morton
2005-04-25 22:13 ` Dave Jones
2005-04-25 23:23 ` Adam Belay
2005-04-26 4:32 ` Benjamin Herrenschmidt
2005-04-26 6:23 ` Adam Belay
2005-04-26 7:14 ` [linux-pm] " Nigel Cunningham
2005-04-26 9:16 ` Pavel Machek
2005-04-26 9:41 ` Pavel Machek
2005-04-26 3:52 ` Benjamin Herrenschmidt
2005-04-26 15:14 ` Alan Stern
2005-04-26 9:39 ` Pavel Machek
2005-04-26 17:50 ` Dave Jones
2005-04-26 20:23 ` Pavel Machek
2005-04-26 3:45 ` Benjamin Herrenschmidt
2005-04-26 15:11 ` Alan Stern
2005-04-26 16:01 ` Alexander Nyberg
2005-04-26 15:41 ` Grant Grundler
2005-04-26 16:07 ` Richard B. Johnson
2005-04-26 16:19 ` Grant Grundler
2005-04-26 17:12 ` Alan Stern
2005-04-26 17:19 ` Lee Revell
2005-04-25 20:08 ` Adam Belay
2005-04-25 20:19 ` Greg KH
2005-04-25 20:24 ` Adam Belay
2005-04-25 20:42 ` Pavel Machek
2005-04-25 20:55 ` Adam Belay
2005-04-25 21:06 ` Pavel Machek
2005-04-26 4:30 ` Benjamin Herrenschmidt
2005-04-26 16:12 ` Grant Grundler
2005-04-26 13:44 ` [linux-usb-devel] " David Brownell
2005-04-26 21:15 ` Pavel Machek
2005-04-25 21:00 ` Greg KH
2005-04-25 21:13 ` Pavel Machek
2005-04-26 3:41 ` Benjamin Herrenschmidt
2005-04-26 10:11 ` Pavel Machek
2005-04-25 21:13 ` [linux-usb-devel] " David Brownell
2005-04-26 3:39 ` Benjamin Herrenschmidt
2005-04-26 6:33 ` Adam Belay
2005-04-26 6:44 ` Greg KH
2005-05-04 7:02 [PATCH] PCI: fix up word-aligned 16-bit PCI config access through sysfs Greg KH
2005-05-04 7:02 ` [PATCH] PCI: Add pci shutdown ability Greg KH
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