On Wed, Feb 16, 2011 at 10:02 AM, kashish bhatia [off-list ref] wrote:

Hi all ,
I wanted to free a data block from disk. So I made a loop device for ext2 fs
and inserted my module(code) through insmod command.
Here are the details :
?I found a function named ext2_free_data() which takes block numbers to be
freed as a parameter. The declaration of the function is as follows :

void ext2_free_data(struct inode *inode, __le32 *p, __le32 *q);

As we can see this function use structure of inode object and it make
changes in this inode object.

This function changes the fields in in-core inode and mark the inode dirty.
But I want the changes made in in-core inode to be reflected in disk inode
immediately .

Incore it will be reflected immediately.

Is there any command to flush the buffers ?

You can either try "sync" from command line, or remount the volume. Or
call ext2_sync_fs() from your module.

--
Regards,
Kashish


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-- 
Thanks -
Manish