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DateFri, 9 May 2008 00:16:47 +0100
FromAlan Cox <>
SubjectRe: [patch] speed up / fix the new generic semaphore code (fix AIM7 40% regression with 2.6.26-rc1)
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In fact, I thought we had fixed most of this already, but hey, I was clearly wrong. I assume Alan looks at it occasionally and groans. Alan?

I have pushed it down to n_tty line discipline code but not within that. It is on the hit list but I'm working on more pressing stuff first (USB layer, extracting commonality to start to tackle open etc etc)
I don't think fixing n_tty is now a big job if someone wants to take a swing at it. The driver write/throttle/etc routines below the n_tty ldisc layer are now BKL clean so it should just be the internal locking of the buffers, window and the like to tackle.

Feel free to have a go 8)



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