Re: [RFC] sys_punchhole()

[Anton Altaparmakov <aia21@cam.ac.uk>]

On Thu, 10 Nov 2005, Badari Pulavarty wrote:
> On Thu, 2005-11-10 at 15:32 -0800, Andrew Morton wrote:
> > Badari Pulavarty <pbadari@us.ibm.com> wrote:
> > >
> > > We discussed this in madvise(REMOVE) thread - to add support 
> > > for sys_punchhole(fd, offset, len) to complete the functionality
> > > (in the future).
> > > 
> > > http://marc.theaimsgroup.com/?l=linux-mm&m=113036713810002&w=2
> > > 
> > > What I am wondering is, should I invest time now to do it ?
> > 
> > I haven't even heard anyone mention a need for this in the past 1-2 years.
> > 
> > > Or wait till need arises ? 
> > 
> > A long wait, I suspect..
> > 
> 
> Okay. I guess, I will wait till someone needs it.
> 
> I am just trying to increase my chances of "getting my madvise(REMOVE)
> patch into mainline" :)
> 

It may be worth asking the Samba people if they want it given that Windows 
has such a function (but it is not a syscall, it is a fsctl - 
FSCTL_SET_ZERO_DATA), so Samba may want to have it, too...

And in case you care, NTFS already has such functionality (currently only 
used in error handling) and implementing the sys_punchole() fs-specific 
function for ntfs will therefore be trivial...

Best regards,

	Anton
-- 
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer / IRC: #ntfs on irc.freenode.net
WWW: http://linux-ntfs.sf.net/ & http://www-stu.christs.cam.ac.uk/~aia21/
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