Re: PATCH: killing read_ahead[]

[Linus Torvalds]

On Wed, 25 Oct 2000, Rik van Riel wrote:
> 
> OTOH, block-dev readahead makes sense for filesystems where
> the packing locality is close to the access pattern BUT NOT
> close to anything the page cache would recognise as being
> close.

I dunno. The main reason I'd like to get the block devices into the page
cache is that right now there is no way to mmap them - something that can
potentially be _very_ useful, regardless of readahead.

And quite frankly, the generic file readahead has been pounded upon and
tested a lot more than the block device read-ahead ever was. I bet it
performs better if for no other reason.

                Linus

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