"Chen, Kenneth W" <[EMAIL PROTECTED]> wrote: > > Losing 6% just from Linux kernel is a huge deal for this type of benchmark. > People work for days to implement features which might give sub percentage > gain. Making Software run faster is not easy, but making software run slower > apparently is a fairly easy task. > >
heh > > > Fine-grained alignment is probably too hard, and it should fall back to > > __blockdev_direct_IO(). > > > > Does it do the right thing with a request which is non-page-aligned, but > > 512-byte aligned? > > > > readv and writev? > > > > That's why direct_io_worker() is slower. It does everything and handles > every possible usage scenarios out there. I hope making the function fatter > is not in the plan. We just cannot make a change like this if it does not support readv and writev well, and if it does not support down-to-512-byte size and alignment. It will break applications. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
