Messages in this thread | | | Date | Tue, 16 Mar 1999 16:18:41 GMT | From | "Stephen C. Tweedie" <> | Subject | Re: OSDI paper - IO-Lite: A Unified I/O Buffering and Caching System |
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Hi,
On Tue, 2 Mar 1999 11:31:01 -0800, jg@pa.dec.com (Jim Gettys) said:
> For full benefits to be reaped, an application can use new system call > interfaces that IO-Lite introduces.
> This has been implemented in FreeBSD... And, of course, it would be nice > to have it in Linux as well, and for Apache to be able to take full > advantage of IO-Lite.
Indeed. Over LinuxWorld I spoke with Linus about the possibility of adding raw IO to the kernel, and we ended up with a design which separated out the actual IO from the business of setting up the user space mappings by creating a separate abstraction layer describing the physical memory into which the kernel can do the read or write. This already looks suspiciously like IO-Lite, especially if we make these io_regions visible to user space.
--Stephen
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