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Re: Possible FC2 inclusions from fedora.us



On Mon, 2004-01-26 at 20:27, Alan Cox wrote:
> On Mon, Jan 26, 2004 at 07:21:58PM +0100, Ronny Buchmann wrote:
> > > The file system may still do smart stuff like merging requests. Also only
> > It's usually used for reading from block devices (disks).
> 
> Issue a few reads and the kernel will begin readahead, it will also merge
> the read and readahead into one I/O at times.
> 
> > > with floppies because the 'real' blocksize of a hard disk is now typically
> > > 8-32K
> > Does the kernel do read-ahead in the block layer or in vfs?
> 
> Yes 8)
> 
> Some of the file systems (especially xfs) do quite smart readahead tricks,
> others use the basic facilities of the block layer and others still like
> jffs and nfs don't use the block layer but their own ways of handling
> this stuff.
> 
> 
Is DMA going to be enabled in FC2?
Chad




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