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Prasad Joshi b312979252 Tear down and flush the mmap region 
The inode eviction should unmap the pages associated with the inode.
These pages should also be flushed to disk to avoid the data loss.
Therefore, use truncate_setsize() in evict_inode() to release the
pagecache.

The API truncate_setsize() was added in 2.6.35 kernel. To ensure
compatibility with the old kernel, the patch defines its own
truncate_setsize function.

Signed-off-by: Prasad Joshi <pjoshi@stec-inc.com>
Closes #255
 		2011-06-27 09:59:19 -07:00
..
90zfs Tear down and flush the mmap region 2011-06-27 09:59:19 -07:00
Makefile.am Add dracut support 2011-03-17 16:52:04 -07:00
Makefile.in Tear down and flush the mmap region 2011-06-27 09:59:19 -07:00
README.dracut.markdown Add dracut support 2011-03-17 16:52:04 -07:00

README.dracut.markdown

How to setup a zfs root filesystem using dracut

  1. Install the zfs-dracut package. This package adds a zfs dracut module to the /usr/share/dracut/modules.d/ directory which allows dracut to create an initramfs which is zfs aware.

  2. Set the bootfs property for the bootable dataset in the pool. Then set the dataset mountpoint property to '/'.

    $ zpool set bootfs=pool/dataset $ zfs set mountpoint=/ pool/dataset

Alternately, legacy mountpoints can be used by setting the 'root=' option on the kernel line of your grub.conf/menu.lst configuration file. Then set the dataset mountpoint property to 'legacy'.

$ grub.conf/menu.lst: kernel ... root=ZFS=pool/dataset
$ zfs set mountpoint=legacy pool/dataset

  1. To set zfs module options put them in /etc/modprobe.d/zfs.conf file. The complete list of zfs module options is available by running the modinfo zfs command. Commonly set options include: zfs_arc_min, zfs_arc_max, zfs_prefetch_disable, and zfs_vdev_max_pending.

  2. Finally, create your new initramfs by running dracut.

    $ dracut --force /path/to/initramfs kernel_version