Re: [PATCH 0/3] ext4: introduce two new ioctls

[Namjae Jeon]

2013/6/24, Christoph Hellwig <hch@xxxxxxxxxxxxx>:
> On Mon, Jun 24, 2013 at 12:44:59PM +1000, Dave Chinner wrote:
>> various DVR companies shipping equivalent ioctl-based functionality
>> for XFS filesystems to both insert and remove chunks in video
>> streams, but I've never been able to find the code for it anywhere.
>
Hi. Christoph.
> Samsung does this, also for UDF.  Namjae, could you please submit these
> two as well, including a proper VFS interface?
Yes, Sure.
Intially, we also thought of adding a new flag to fallocate instead of ioctls.
But as Ted rightly pointed, fallocate works on byte granularity and we
have block aligned restrictions, so once we decided to go for ioctls
and hear other people opninons.
Currently, we can try implementing dave's suggesstion of introducing a
new flag FALLOC_FL_COLLAPSE_RANGE  for falloctae instead of individual
ioctls for both XFS and EXT4.

Thanks.
>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/