Re: [PATCH v3 0/3] rseq: minor optimizations

[Mathieu Desnoyers]

----- On Apr 13, 2021, at 4:33 PM, Eric Dumazet eric.dumazet@xxxxxxxxx wrote:

> From: Eric Dumazet <edumazet@xxxxxxxxxx>
> 
> rseq is a heavy user of copy to/from user data in fast paths.
> This series tries to reduce the cost.
> 
> v3: Third patch going back to v1 (only deal with 64bit arches)
> v2: Addressed Peter and Mathieu feedbacks, thanks !

For the whole series:

Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>

Thanks Eric!

Mathieu

> 
> Eric Dumazet (3):
>  rseq: optimize rseq_update_cpu_id()
>  rseq: remove redundant access_ok()
>  rseq: optimise rseq_get_rseq_cs() and clear_rseq_cs()
> 
> kernel/rseq.c | 29 +++++++++++++++++++++--------
> 1 file changed, 21 insertions(+), 8 deletions(-)
> 
> --
> 2.31.1.295.g9ea45b61b8-goog

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com