On Fri, 2005-07-15 at 17:56 +0100, Joel Becker wrote: > On Thu, Jul 14, 2005 at 10:18:28PM -0700, Badari Pulavarty wrote: > > I can imagine a reason for relaxing the alignment. I keep getting asked > > whether we can do "O_DIRECT mount option". Database folks wants to > > make sure all the access to files in a given filesystem are O_DIRECT > > All currently existing "O_DIRECT mount option" implementations > that I know of do: > > if (not-512-aligned) > bounce_buffer() > > That is, no one attempts to support the wacky variations in DMA engines.
I believe some OSs do buffered IO, if there is a problem with alignment. Thanks, Badari - 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/
