Jan Kara wrote: > BH_Dirty > - Ideally, this bit should mean "buffer has data that have to be > written". But it is not quite true. The problem happens when > someone calls set_page_dirty() on the page to which buffers are > attached or similarly when buffers are attached to a dirty > page. Then all buffers attached to the page are marked dirty - > even those that are beyond end of file which obviously should not > be written. > > When buffer is dirty, the page has to be dirty as well (mark > buffer dirty takes care of that). It is not necessarily the other > way around and buffer dirty bit is what ultimately decides whether > the buffer goes to disk or not. That last sentence implies page can be dirty while a buffer in the page is not dirty. In that case, do buffers beyond the end of file need to be set dirty by set_page_dirty()? If yes, perhaps the text could explain why. -- Jamie -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
