From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clement Gallin-Douathe <c-gallin-douathe@ti.com>
Subject: Re: kernel oops in jbd2_journal_get_descriptor_buffer
Date: Thu, 11 Oct 2012 17:22:49 +0200
Message-ID: <5076E449.5000004@ti.com>
References: <50768765.8040406@ti.com> <20121011095932.GA16624@quack.suse.cz>
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Cc: <tytso@mit.edu>, <adilger.kernel@dilger.ca>,
	<linux-ext4@vger.kernel.org>
To: Jan Kara <jack@suse.cz>
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Jan,

Thanks for your answer.
I have checked and I have no tricks with mapping flags (mount ext4 
options : rw,nosuid,nodev,noatime,errors=continue,data=ordered)
I have added high mem verification on grow_dev_page function just after 
the page creation with find_or_create_page function.
PageHighMem() is not null.
So you think, it's a good idea to look into mm/page_alloc.c and verify 
gfp flags?

regards,

Clement

On 10/11/2012 11:59 AM, Jan Kara wrote:
> !__GFP_HIGH in particular. So does the device ext4 is mounted on play
> some tricks with mapping fl