Re: [PATCH] speed up statfs

[Badari Pulavarty <pbadari@gmail.com>]

On Wed, 2007-07-04 at 16:23 -0600, Andreas Dilger wrote:
> Hi,
> this is a patch we are currently using that speeds up statfs.
> It is very simple - the "overhead" calculation, which takes a
> huge amount of time for large filesystems, never changes unless
> the size of the filesystem itself changes.  That means we can
> store it in memory and only recalculate if the filesystem has
> been resized (almost never).
> 
> It is based on ext3 but is trivally updated to ext4.  It also
> fixes a minor problem that we never update the on-disk superblock
> free blocks/inodes counts until the filesystem is unmounted.
> While not fatal, we may as well update that on disk when we have
> the information, and it makes things like debugfs and dumpe2fs
> report a bit more accurate info.
> 
> I'd be happy if someone could update this to the latest kernel and
> for ext2 and ext4 also.
> 

I forward ported it to latest + did the same for ext2 and ext4 also.
Compiles fine. I will post them tomorrow after little testing.

Thanks,
Badaru