From: Jaehoon Chung <jh80.chung@samsung.com>
To: Per Forlin <per.forlin@linaro.org>
Cc: Jaehoon Chung <jh80.chung@samsung.com>,
"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
Chris Ball <cjb@laptop.org>, Philip Rakity <prakity@marvell.com>,
Kyungmin Park <kyungmin.park@samsung.com>
Subject: Re: [RFC] Kernel NULL pointer dereference for mmc
Date: Wed, 13 Jul 2011 11:13:53 +0900 [thread overview]
Message-ID: <4E1CFF61.7070701@samsung.com> (raw)
In-Reply-To: <CAJ0pr18-UvxHwfWuVFy=TfLvWSbfRwAY1CL0EBh+fPOi6KPGRw@mail.gmail.com>
Hi Per.
#iozone -az -i 0 -i 1 -i 2 -s 200m -U /mnt/mmc -f /mnt/mmc/test -e
/mnt/mmc is mounted /dev/mmcblk0p6 for EXT4 filesystem.
It's my command..i tested with both SDHCI and DW_MMC controller.
DW_MMC controller didn't find that error message.
But SDHCI controller always occurred that error.
I'm debugging for this issue..
If you have any doubts, plz let me know..
Regards,
Jaehoon Chung
Per Forlin wrote:
> On 12 July 2011 06:23, Jaehoon Chung <jh80.chung@samsung.com> wrote:
>> Hi
>>
>> When I tested MMC card with IOzone, i found this message..
>> I tried to find what problem..but i didn't find yet..
>>
>> So i want to get mailing's help..Have ever seen the below message?
>> (using SDHCI controller, eMMC 4.41 card, 8-bit buswidth)
>>
>> I didn't applied about post_req/pre_req in sdhci.c.
>> (using latest kernel in mmc-tree)
>>
> It's fine to set post_req and pre_req to NULL (default value is NULL)
> Can you post the IOzone command line?
> I want to run the same IOzone command on Snowball and Pandaboard.
>
> Thanks,
> Per
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prev parent reply other threads:[~2011-07-13 2:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-12 4:23 [RFC] Kernel NULL pointer dereference for mmc Jaehoon Chung
2011-07-12 5:24 ` Philip Rakity
2011-07-12 11:40 ` Per Forlin
2011-07-13 2:13 ` Jaehoon Chung [this message]
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