Re: [patch] epoll use a single inode ...

[Anton Blanchard <anton@samba.org>]

Hi,

> Well, I hope a prefetch(NULL) is OK because we are doing millions of
> them (see include/linux/list.h :) )

Funny you mention this. We found some noticeable ppc64 regressions when
moving the dcache to standard list macros and had to do this to fix it
up:

static inline void prefetch(const void *x)
{
        if (unlikely(!x))
                return;

        __asm__ __volatile__ ("dcbt 0,%0" : : "r" (x));
}

Urgh :)

Anton