Messages in this thread | | | Date | Wed, 17 Aug 2016 12:07:22 -0600 | From | Ross Zwisler <> | Subject | Re: [PATCH] ext4: allow DAX writeback for hole punch |
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On Wed, Aug 17, 2016 at 07:19:55PM +0200, Jan Kara wrote: > On Wed 17-08-16 10:11:02, Ross Zwisler wrote: > > Currently when doing a DAX hole punch with ext4 we fail to do a writeback. > > This is because the logic around filemap_write_and_wait_range() in > > ext4_punch_hole() only looks for dirty page cache pages in the radix tree, > > not for dirty DAX exceptional entries. > > > > Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> > > Thanks. The patch looks correct, you can add: > > Reviewed-by: Jan Kara <jack@suse.cz> > > Although why don't we just simplify the test below to > mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)? After all the mapping should > not have the dirty tag set if there are no pages / no entries?
Sure, that works. I'll update to that in V2, and I'll add stable. Thanks!
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