On Mon, Oct 09, 2006 at 04:53:02PM -0500, Steve Lord wrote:
> You might want to think about keeping the directory a little
> more contiguous than individual disk blocks. XFS does have
> code in it to allocate the directory in chunks larger than
> a single file system block. It does not get used on linux
> because the code was written under the assumption you can
> see the whole chunk as a single piece of memory which does not
> work to well in the linux kernel.
This code is enabled and seems to work in Linux. I don't know if it
passes xfsqa so I don't know how reliable this feature is. TO check
it all I did was run a quick test on a x86_64 kernel (4k page
size) using 16k directory blocks (4 pages):
# mkfs.xfs -f -n size=16384 /dev/ubd/1
.....
# xfs_db -r -c "sb 0" -c "p dirblklog" /dev/ubd/1
dirblklog = 2
# mount /dev/ubd/1 /mnt/xfs
# for i in `seq 0 1 100000`; do touch fred.$i; done
# umount /mnt/xfs
# mount /mnt/xfs
# ls /mnt/xfs |wc -l
100000
# rm -rf /mnt/xfs/*
# ls /mnt/xfs |wc -l
0
# umount /mnt/xfs
#
Cheers,
Dave.
--
Dave Chinner
Principal Engineer
SGI Australian Software Group
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
