Re: RFC/RFS: zerofree - zero free blocks from ext2/3 file-systems

[Thibaut Paumard <paumard@users.sourceforge.net>]

Le 7 févr. 08 à 12:54, Paul Cager a écrit :

> On Thu, February 7, 2008 10:15, Thibaut Paumard wrote:
> > Le 7 févr. 08 à 02:11, Henrique de Moraes Holschuh a écrit :
> >
> > > On Wed, 06 Feb 2008, Thibaut Paumard wrote:
> > > >  Zerofree finds the unallocated, non-zeroed blocks in an ext2 or  
> > > > ext3
> > > >  file-system and fills them with zeroes. This is useful if the
> > > > device on
> > >
> > > How does zerofree avoid race conditions of something trying to use
> > > a block
> > > it wil zero in the time window (<determine block is free>, <zero
> > > block>]?
> >
> > It works only on unmounted or read-only-mounted filesystems.
> >
> > Regards, Thibaut.
>
> That sounds like something I would like to make use of. Does it handle
> sparse file efficiently (i.e. not writing a block if it is already  
> zero)?

Yes.

Regards, T.

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