Re: [PATCH] sheepdog: fine grained locking in write path

On Tue, 21 Apr 2015 18:33:53 +0900
Hitoshi Mitake <[email protected]> wrote:

> Current sheepdog driver has a big write lock section. It harms write
> performance significantly. This patch removes a needless big write
> lock section with checking submitted requests can cause COW or
> not. The write performance can be improved significantly.
> 
> In a case of 4k rand write by fio:
>  - before: 1144 IOPS
>  - after:  19074 IOPS
> 
> Signed-off-by: Hitoshi Mitake <[email protected]>
> ---
>  usr/bs_sheepdog.c | 14 +++++++++++++-
>  1 file changed, 13 insertions(+), 1 deletion(-)

Applied, thanks.