Re: [PATCH] remove BKL from llseek

[Ingo Molnar]

On Wed, 28 Nov 2001, Anton Blanchard wrote:

> The dbench-o-matic results from removing the BKL from llseek can be
> found here:
>
> http://samba.org/~anton/linux/llseek/
>
> Same hardware as the earlier test, 12 way ppc64. The patch is pretty
> dumb, I just pushed the kernel lock down into the llseek methods and
> only replaced it with the inode semaphore in generic_llseek. Im sure
> Al will have a better fix for 2.5, I just wanted to highlight the
> problem :)

yeah i did that once (about a year ago or more) and it was rejected, cant
remember why :-) But it's indeed an important optimization and it shows up
in dbench overhead.

	Ingo