Cleanup and optimization patches for percpu

[PATCH 1/8] mm/percpu: remove unused pcpu_map_extend_chunks

Posted by Baoquan He 3 years, 5 months ago

Since commit 40064aeca35c ("percpu: replace area map allocator with
bitmap"), it is unneeded.

Signed-off-by: Baoquan He <bhe@redhat.com>
---
 mm/percpu.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/mm/percpu.c b/mm/percpu.c
index 27697b2429c2..26d8cd2ca323 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -174,9 +174,6 @@ static DEFINE_MUTEX(pcpu_alloc_mutex);	/* chunk create/destroy, [de]pop, map ext
 
 struct list_head *pcpu_chunk_lists __ro_after_init; /* chunk list slots */
 
-/* chunks which need their map areas extended, protected by pcpu_lock */
-static LIST_HEAD(pcpu_map_extend_chunks);
-
 /*
  * The number of empty populated pages, protected by pcpu_lock.
  * The reserved chunk doesn't contribute to the count.
-- 
2.34.1

Re: [PATCH 1/8] mm/percpu: remove unused pcpu_map_extend_chunks

Posted by Dennis Zhou 3 years, 5 months ago

On Mon, Oct 24, 2022 at 04:14:28PM +0800, Baoquan He wrote:
> Since commit 40064aeca35c ("percpu: replace area map allocator with
> bitmap"), it is unneeded.
> 
> Signed-off-by: Baoquan He <bhe@redhat.com>
> ---
>  mm/percpu.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/mm/percpu.c b/mm/percpu.c
> index 27697b2429c2..26d8cd2ca323 100644
> --- a/mm/percpu.c
> +++ b/mm/percpu.c
> @@ -174,9 +174,6 @@ static DEFINE_MUTEX(pcpu_alloc_mutex);	/* chunk create/destroy, [de]pop, map ext
>  
>  struct list_head *pcpu_chunk_lists __ro_after_init; /* chunk list slots */
>  
> -/* chunks which need their map areas extended, protected by pcpu_lock */
> -static LIST_HEAD(pcpu_map_extend_chunks);
> -
>  /*
>   * The number of empty populated pages, protected by pcpu_lock.
>   * The reserved chunk doesn't contribute to the count.
> -- 
> 2.34.1
> 
> 

Acked-by: Dennis Zhou <dennis@kernel.org>

Thanks,
Dennis