Messages in this thread | | | Date | Mon, 5 Dec 2011 11:50:16 -0800 | From | "Darrick J. Wong" <> | Subject | Re: [PATCH 10/22] ext4: Verify and calculate checksums for extent tree blocks |
| |
On Mon, Dec 05, 2011 at 11:40:15AM -0500, Ted Ts'o wrote: > On Mon, Nov 28, 2011 at 03:27:25PM -0800, Darrick J. Wong wrote: > > /* > > + * This is the extent tail on-disk structure. > > + * All other extent structures are 12 bytes long. It turns out that > > + * block_size % 12 >= 4 for all valid block sizes (1k, 2k, 4k). > > More generally, block_size % 12 is >= 4 for all powers of 2 greater > than 12 bytes. I'd probably remove (1k, 2k, 4k) because that might > scare people who might say, "hey! I'm using a 16k block size on my > HPC system running on a Power or Itanium box --- am I going to be OK?". > Valid block sizes go up to the page size of the hardware in question...
Ok.
--D
| |