Hi: We met an ext4 BUG_ON in extents.c:1716 which crash kernel flush thread, and result in disk unvailiable. BUG details refer to: http://www.gossamer-threads.com/lists/xen/devel/217091?do=post_view_threaded Attached is the fix, verified in our env. Without this patch, more than 3 servers hit BUG_ON in our hundreds of servers every day. many thanks.
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0001-ext4-fix_dirty_extent_when_split_max&last_extent.patch
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