----- Original Message ----- > Add infrastructure for multipage buffered writes. This is implemented > using an main iterator that applies an actor function to a range that > can be written. > > This infrastucture is used to implement a buffered write helper, one > to zero file ranges and one to implement the ->page_mkwrite VM > operations. All of them borrow a fair amount of code from fs/buffers. > for now by using an internal version of __block_write_begin that > gets passed an iomap and builds the corresponding buffer head. > > The file system is gets a set of paired ->iomap_begin and ->iomap_end > calls which allow it to map/reserve a range and get a notification > once the write code is finished with it. > > Based on earlier code from Dave Chinner. > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > --- > + /* > + * For unwritten regions, we always need to ensure that > + * sub-block writes cause the regions in the block we are not > + * writing to are zeroed. Set the buffer as new to ensre this. Minor typo: s/ensre/ensure/ above. Reviewed-off-by: Bob Peterson <rpeterso@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
