Re: [RFC][PATCH 6/8] mm: handle_speculative_fault()

[KAMEZAWA Hiroyuki]

On Tue, 5 Jan 2010 15:09:47 +0900
Minchan Kim <minchan.kim@xxxxxxxxx> wrote:
> My humble opinion is following as.
> 
> Couldn't we synchronize rcu in that cases(munmap, exit and so on)?
> It can delay munap and exit but it would be better than handling them by more
> complicated things, I think. And both cases aren't often cases so we
> can achieve advantage than disadvantage?
> 

In most case, a program is single threaded. And sychronize_rcu() in unmap path
just adds very big overhead.

Thanks,
-Kame

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/