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From: fazlin on 20 Apr 2010 06:50
On Apr 19, 11:24 pm, Måns Rullgård <m...(a)mansr.com> wrote:
> fazlin <fazlin...(a)gmail.com> writes:
> > On Apr 19, 9:02 pm, fazlin <fazlin...(a)gmail.com> wrote:
> >> On Apr 19, 9:00 pm, M ns Rullg rd <m...(a)mansr.com> wrote:
>
> >> > fazlin <fazlin...(a)gmail.com> writes:
> >> > > Hello All,
>
> >> > > I am running an 2.6.29 linux kernel machine and am using a partition
> >> > > with ext2 filesystem.
>
> >> > > I ran dumpe2fs on this partition before and after running "df" command
> >> > > and find that the "free block count" is getting reduced (which
> >> > > according to me means some file has grown since free inode count
> >> > > remains same).
>
> >> > > I ran "df" with strace and find that it does statfs on all partitions.
> >> > > Is it possible for statfs to modify the block counts??
>
> >> > Does that filesystem have any log files on it? Files in /var/log are
> >> > changing all the time, and the shell might be logging commands to your
> >> > home directory.
>
> >> No.. That partition has one file that cannot be written to and "lost
> >> +found" directory...
>
> > I did more investigation and wrote a small pgm. that does statfs on
> > this partition. Running this also modified the free block count.
>
> > I looked into the kernel function ext2_statfs and i find that it
> > updates "es->s_free_blocks_count" and "es->s_free_inodes_count"
> > instead of just filling the buffer. Any idea why this done???? I guess
> > this mite be causing the prob that i see...
>
> Here's the explanation:http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=co...
>
> --
> M ns Rullg rd
> m...(a)mansr.com

Gr8... Thnx a lot :)

That clears my doubt...

- Fazlin
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