Hi all, xfs_db doesn't even try to use directio to access block devices. This is rather strange, since mkfs, copy, and repair use it. Modify xfs_db to set LIBXFS_DIRECT so that we don't have to deal with the bdev pagecache being out of sync with what the kernel might have written directly to the block device. While we're at it, if we're using directio to the block device, don't fail if we can't set the bufferhead size to the sectorsize, because we're not using the pagecache anyway. If you're going to start using this code, I strongly recommend pulling from my git trees, which are linked below. This has been running on the djcloud for months with no problems. Enjoy! Comments and questions are, as always, welcome. --D xfsprogs git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfsprogs-dev.git/log/?h=db-use-directio --- db/init.c | 1 + libxfs/init.c | 8 ++++++-- 2 files changed, 7 insertions(+), 2 deletions(-)
