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SubjectRe: [PATCH] Radix-tree pagecache for 2.5
Hi!

> > > the biggest reason for this is that we *suck* at readahead for mmap....
> >
> > Is there not also fault overhead and similar issues related to mmap(2)
> > in general, that are not present with read(2)/write(2)?
>
> If a fault is more expensive than a system call, we're doing
> something wrong in the page fault path ;)

You can read 128K at a time, but you can't fault 128K...
Pavel

--
Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.

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