On Fri, Jul 27, 2012 at 10:00:59AM +0200, Lukas Czerner wrote:
> This set of patches are aimed to allow truncate_inode_pages_range() handle
> ranges which are not aligned at the end of the page. Currently it will
> hit BUG_ON() when the end of the range is not aligned. Punch hole feature
> however can benefit from this ability saving file systems some work not
> forcing them to implement their own invalidate code to handle unaligned
> ranges.
>
> In order for this to work we need however new address space operation
> invalidatepage_range which should be able to handle page invalidation with
> offset and length specified.
>
> patch 01: Implements the new invalidatepage_range address space
> operation in the mm layer
> patch 02 - 05: Wire the new invalidatepage_range aop to the ext4, xfs
> and
> ocfs2 file system (which are currently the only file
> systems supporting punch hole) and implement this
> functionality for jbd2 as well.
> patch 06: Change truncate_inode_pages_range() to handle unaligned
> ranges.
> patch 07 - 15: Ext4 specific changes which take benefit from the
> previous truncate_inode_pages_range() change. Not all
> are realated specifically to this change, but all are
> related to the punch hole feature.
What's the current status of this patch series?
I haven't seen much if any comment from the mm folks and the xfs/ocfs2
folks. I've incorporated the patches into the unstable portion of the
ext4 tree so I can do some testing (some minor changes to the ext4
patches were needed to rebase the patch series to the 3.6-rc1-based
ext4 dev tree, but nothing major). However, I don't want to include
this into the ext4 tree for merging into linux-next unless we get
general agreement from the maintainers of the other trees that are
affected by this patch series.
Thansk,
- Ted
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