Re: Freezing File Systems

That is most likely due to the filesystem cache. Try running iostat  
and checking the block device statistics for the device you froze!

-- Mark
On Dec 31, 2008, at 9:39 AM, rishi agrawal wrote:

> I used a kernel module to freeze the file system using the function  
> freeze_bdev
>
> but when i am try to use touch command on the file system i am able to
> create the files.
>
> even read requests are served immediately
>
> only the write requests are being blocked
>
> until i call the thaw function
>
> can i have an explanation for this
>
> On Wed, Dec 31, 2008 at 6:11 PM, ajit mote <[email protected]>  
> wrote:
>> Hello,
>>
>>> I want to freeze a file system. I have seen a field in vfs  
>>> superblock
>>> s_frozen.
>>>
>>> But i am clue less about freezing the file system using that.
>>
>>
>> freeze_bdev function ( fs/buffer.c) lock a filesystem and force it  
>> into a
>> consistent state ...
>> Above function use s_frozen flag to freez the file system ...
>>
>>>
>>>
>>>
>>> --
>>> Regards,
>>> Rishi B. Agrawal
>>>
>>> --
>>> To unsubscribe from this list: send an email with
>>> "unsubscribe kernelnewbies" to [email protected]
>>> Please read the FAQ at http://kernelnewbies.org/FAQ
>>>
>>
>>
>>
>> --
>> Thanks & Regards,
>> Ajit Subhash Mote
>>
>>
>
>
>
> -- 
> Regards,
> Rishi B. Agrawal
>
> --
> To unsubscribe from this list: send an email with
> "unsubscribe kernelnewbies" to [email protected]
> Please read the FAQ at http://kernelnewbies.org/FAQ
>


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