linux-kernel - Re: panic while doing lots of IO on lpfc

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Message-ID: <Pine.SOC.4.64.0810091737430.5106@math.ut.ee>
Date:	Thu, 9 Oct 2008 17:39:50 +0300 (EEST)
From:	Meelis Roos <mroos@...ux.ee>
To:	Nick Piggin <nickpiggin@...oo.com.au>
cc:	Linux Kernel list <linux-kernel@...r.kernel.org>,
	linux-scsi@...r.kernel.org
Subject: Re: panic while doing lots of IO on lpfc

> > Bad page state in process 'dd'
> > page:ffffe200005130c0 flags:0x4000000000000009 mapping:0000000000000000
> > mapcount:0 count:0
> > Trying to fix it up, but a reboot is needed
> 
> Tried to lock a free page. Is the address of the page always the same,
> and the first bit in flags always set after each reboot? Does the
> machine pass a memtest?

The machine has worked transporting lots of data and compiling many 
kernels a week, but I haven't done a memtest in more than a year.

The messages have scrolled away in other cases.

> It could be that someone actually tried to lock the page, though...
> You could try putting a BUG_ON(!page_count(page)) at the start of
> the trylock_page function.
> 
> Some more messages might provide more clues.

Will try netconsole after haveing finished the same test with Qlogic 
HBA.

-- 
Meelis Roos (mroos@...ux.ee)
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