Re: TAKE - implement direct read and write in XFS

[Andi Kleen <ak@xxxxxxx>]

On Mon, Mar 05, 2001 at 10:54:37AM -0600, Steve Lord wrote:
> This implements direct I/O for xfs on linux, read and write should function.
> Testing has been limited so far. There is cache coherency between buffered
> and direct I/O to the extent that the direct calls will flush or flush and
> invalidate the cache before starting I/O. A systune has been added at
> /proc/sys/vm/pagebuf/max_dio_pages which defines how many pages will be
> locked down at once during an individual read or write call, this does not
> limit the size of the I/O, just the size of the requests which will be
> issued to the block layer.

Very cool :-)

-Andi