Re: Oops with ext4 from 2.6.27-rc3

Theodore Tso
2008-08-13T22:01:03Z

On Wed, Aug 13, 2008 at 11:07:06PM +0200, Christian Hesse wrote:
>
> Please look at the bottom of my last two mails... That was with your patch
> applied.

Sorry, I missed it. The new BUG seems to be a bug in the delayed
allocation code, specifically here, in fs/ext4/inode.c:ext4_da_release_space():

/* figure out how many metablocks to release */
BUG_ON(mdb > EXT4_I(inode)->i_reserved_meta_blocks);
mdb_free = EXT4_I(inode)->i_reserved_meta_blocks - mdb;

I've quickly looked at the code, and how i_reserved_meta_blocks gets
updated, and nothing *obviously* wrong is jumping out at me. Anyone
else have time to investigate this a bit more deeply?

- Ted