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SubjectRe: [Patch] shm bug introduced with pagecache in 2.3.11
DateFri, 19 Nov 1999 14:40:15 +0000 (GMT)
FromAlan Cox <>
> > News servers like Typhoon , high performance threaded web servers (eg Zeus)
>
> Do you know if they are using mmap?

Yes. Typhoon uses threaded mmap so aggressively it became an unintentional
test suite for the Linux mm layer, and in 2.0/2.1 it found a lot of bugs.

> Please note that the test is extremely I/O bound, ie I defeat read-ahead
> with a RNG, and I only read one byte in every page, and the file is far
> larger than available memory.

I would expect Typhoon to show some reasonably sane locality


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