Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > I defintively like the idea of killing ITER_PIPE. Isn't the 16 > folios in a folio tree often much less than what we could fit into > a single pipe buf? Unless you have a file system that can use > huge folios for buffered I/O and actually does this might significantly > limit performance. There's a loop there that repeats the filemap_get_pages() until either the pipe is full or we hit EOF, the same as in filemap_read() (upon which this is based). I want to use filemap_get_pages() if I can as that does all the readahead stuff. What might be nice, though, is if I could tell it to return rather than waiting for a folio to come uptodate if it has already returned a folio so that I can push the other side of the splice along whilst the read is in progress. David
