From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Andi Kleen <ak@muc.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
brking@us.ibm.com, Paul Mackerras <paulus@samba.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/1] pci: Block config access during BIST (resend)
Date: Mon, 17 Jan 2005 09:14:18 +1100 [thread overview]
Message-ID: <1105913658.27410.107.camel@gaston> (raw)
In-Reply-To: <20050116220714.GA76666@muc.de>
On Sun, 2005-01-16 at 23:07 +0100, Andi Kleen wrote:
> > What is complex in there ? I agree it's not convenient to do this from
> > the very low level ones that don't take the pci_dev * as an argument,
> > but from the higher level ones that does, the overhead is basically to
> > test a flag in the pci_dev, I doubt it will be significant in any way
> > performance wise, especially compared to the cost of a config space
> > access...
>
> For once you cannot block in them. There are even setups that
> need to (have to) do config space accesses in interrupt handlers.
> The operations done there should be rather light weight.
I don't think we ever want to block in that sense. I think all we need
is the "filter" mecanism, that is drop writes and return cached data on
reads when the device is "offlined"...
Ben.
next prev parent reply other threads:[~2005-01-16 22:23 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-10 14:49 [PATCH 1/1] pci: Block config access during BIST (resend) brking
2005-01-10 16:10 ` Andi Kleen
2005-01-10 16:25 ` Brian King
2005-01-10 16:29 ` Andi Kleen
2005-01-10 22:57 ` Brian King
2005-01-11 14:37 ` Alan Cox
2005-01-11 17:33 ` Andi Kleen
2005-01-11 22:17 ` Brian King
2005-01-13 15:36 ` Alan Cox
2005-01-13 15:35 ` Alan Cox
2005-01-13 18:03 ` Andi Kleen
2005-01-13 18:46 ` Alan Cox
2005-01-13 20:23 ` Andi Kleen
2005-01-13 19:44 ` Alan Cox
2005-01-13 21:50 ` Andi Kleen
2005-01-15 0:33 ` Alan Cox
2005-01-15 1:44 ` Andi Kleen
2005-01-15 1:01 ` Alan Cox
2005-01-15 6:20 ` Benjamin Herrenschmidt
2005-01-16 0:58 ` Alan Cox
2005-01-16 4:01 ` Benjamin Herrenschmidt
2005-01-16 4:48 ` Andi Kleen
2005-01-16 20:53 ` Benjamin Herrenschmidt
2005-01-16 22:07 ` Andi Kleen
2005-01-16 22:14 ` Benjamin Herrenschmidt [this message]
2005-01-16 21:10 ` Alan Cox
2005-01-18 15:14 ` Brian King
2005-01-18 23:31 ` Andi Kleen
2005-01-18 23:36 ` Brian King
2005-01-19 22:40 ` Alan Cox
2005-01-26 16:34 ` Brian King
2005-01-26 22:10 ` Benjamin Herrenschmidt
2005-01-27 15:53 ` Alan Cox
2005-01-27 18:44 ` Brian King
2005-01-27 23:15 ` Benjamin Herrenschmidt
2005-01-28 14:35 ` Brian King
2005-02-01 7:27 ` Greg KH
2005-02-01 15:12 ` Brian King
2005-02-01 15:44 ` Matthew Wilcox
2005-02-01 17:35 ` Brian King
2005-02-01 17:47 ` Matthew Wilcox
2005-02-01 19:01 ` Brian King
2005-02-01 23:00 ` Benjamin Herrenschmidt
2005-02-02 15:33 ` Brian King
2005-02-08 20:08 ` Greg KH
2005-06-21 16:08 ` Brian King
2005-08-23 15:11 ` [PATCH 1/2] " Brian King
2005-08-23 15:14 ` [PATCH 2/2] ipr: " Brian King
2005-09-01 23:03 ` [PATCH 1/2] pci: " Andrew Morton
2005-09-02 23:56 ` Brian King
2005-09-02 22:43 ` Grant Grundler
2005-09-02 23:11 ` Paul Mackerras
2005-09-03 0:08 ` Grant Grundler
2005-09-03 23:37 ` Brian King
2005-09-03 19:39 ` Grant Grundler
2005-09-05 18:31 ` Brian King
2005-09-06 4:48 ` Grant Grundler
2005-09-06 14:28 ` Brian King
2005-09-07 5:49 ` Paul Mackerras
2005-09-07 14:58 ` Grant Grundler
2005-09-07 22:39 ` Paul Mackerras
2005-09-08 1:21 ` Grant Grundler
2005-09-08 3:05 ` Brian King
2005-09-08 4:08 ` Grant Grundler
2005-02-01 18:58 ` [PATCH 1/1] " Greg KH
2005-02-01 23:07 ` Benjamin Herrenschmidt
2005-02-01 22:58 ` Benjamin Herrenschmidt
2005-01-10 19:23 ` Alan Cox
-- strict thread matches above, loose matches on Subject: below --
2004-12-14 19:41 brking
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