Re: [PATCH v6 07/15] fs, dax: use page->mapping to warn if truncate collides with a busy page

Hi Dan, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v4.16-rc5 next-20180316] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Da

[PATCH v6 07/15] fs, dax: use page->mapping to warn if truncate collides with a busy page

Catch cases where extent unmap operations encounter pages that are pinned / busy. Typically this is pinned pages that are under active dma. This warning is a canary for potential data corruption as truncated blocks could be allocated to a new file while the device is still performing i/o. Here is