Messages in this thread |  | | From | Daniel Phillips <> | Subject | Re: linux-2.4.10-pre5 | Date | Mon, 10 Sep 2001 02:04:19 +0200 |
| |
On September 10, 2001 01:54 am, Alan Cox wrote: > How do you plan to handle the situation where we have multiple instances > of the same 4K disk block each of which contains 1K of data in the > start of the page copy and 3K of zeroes. > > This isnt idle speculation - thing about BSD UFS fragments.
This is handled the same way ReiserFS handles tail merging now - by instantiating multiple pages in the respective inode mappings with copies of the respective parts of the shared block, which stays in the physical block cashe (aka buffer cache).
The dirty work is done by xxx_get_block.
-- Daniel - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |