Re: How can I flush all writes before yanking the power cable?

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On Thu, Feb 7, 2013 at 3:58 PM, Theodore Ts'o <tytso@xxxxxxx> wrote:
> On Thu, Feb 07, 2013 at 02:37:02PM -0500, Autif Khan wrote:
>>
>> That was precisely my ignorance. I did not know about barrier. Adding
>> it during mount ro and remount rw seems to have fixed these issues.
>
> You also didn't say what file system you were using.  Was it ext4?
> ext3?  ext2?  What kernel version?  On modern kernels barrier is
> enabled by default for both ext3 and ext4.

The filesystem is ext4. Kernel version is 3.2.0

I could not grep -i  barrier in the kernel config. How is barrier
enabled or disabled in the kernel by default?
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