linux-kernel - Re: e1000e NVM corruption issue status

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Message-Id: <200809261139.57607.jbarnes@virtuousgeek.org>
Date:	Fri, 26 Sep 2008 11:39:52 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Arjan van de Ven <arjan@...ux.intel.com>
Cc:	Jiri Kosina <jkosina@...e.cz>,
	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	LKML <linux-kernel@...r.kernel.org>, agospoda@...hat.com,
	"Ronciak, John" <john.ronciak@...el.com>,
	"Allan, Bruce W" <bruce.w.allan@...el.com>,
	"Graham, David" <david.graham@...el.com>, kkiel@...e.de,
	tglx@...utronix.de, chris.jones@...onical.com,
	arjan@...ux.jf.intel.com
Subject: Re: e1000e NVM corruption issue status

On Friday, September 26, 2008 11:23 am Jesse Barnes wrote:
> On Friday, September 26, 2008 10:52 am Jesse Barnes wrote:
> > On Friday, September 26, 2008 4:49 am Arjan van de Ven wrote:
> > > Jiri Kosina wrote:
> > > > On Thu, 25 Sep 2008, Brandeburg, Jesse wrote:
> > > >> this is the current set of patches that I have to help us debug
> > > >> and/or fix e1000e issues found during this debug effort for
> > > >> the corrupt NVM.  the "drop stats lock" - "reset swflag" patches
> > > >> allow Thomas' patch for a mutex in the SWFLAG acquire function to
> > > >> run without any errors.
> > > >
> > > > Thanks. Also Jesse Barnes' patch shouldn't be forgotten, could you
> > > > please add it to that lineup?
> > > >
> > > > 	http://marc.info/?l=linux-kernel&m=122237193628087&w=2
> > >
> > > can we (for now) also stick a WARN_ON() into that failure path? that
> > > way we can at least catch if/when this happens more visibly..... if it
> > > happens consistently in say the new distros we can be more confident
> > > that we're down the right path in diagnosing the issue.
> >
> > I'm spinning a new one now with some debug output, stay tuned (just gotta
> > boot my test box).
>
> Ok here's an updated one.  Jesse (Br) can you add it to your list?  If the
> X driver really is mapping too much this should catch it, as long as it
> goes through sysfs.

Arjan pointed out I may as well just use WARN() these days.  Updated patch 
attached.

-- 
Jesse Barnes, Intel Open Source Technology Center

View attachment "pci-sysfs-mmap-range-check-3.patch" of type "text/x-diff" (1398 bytes)