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authorDavid Hildenbrand <david@redhat.com>2020-08-07 09:25:38 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-07 21:33:29 +0300
commit839195352d8235072dcaac054b2e26b2dd2213e5 (patch)
tree343e61c2722e5adf12b05c1e62cd48ac11bc52bb /mm/shuffle.h
parent93146d98ce73fa416be3ffa147247a2454645ebc (diff)
downloadlinux-839195352d8235072dcaac054b2e26b2dd2213e5.tar.xz
mm/shuffle: remove dynamic reconfiguration
Commit e900a918b098 ("mm: shuffle initial free memory to improve memory-side-cache utilization") promised "autodetection of a memory-side-cache (to be added in a follow-on patch)" over a year ago. The original series included patches [1], however, they were dropped during review [2] to be followed-up later. Due to lack of platforms that publish an HMAT, autodetection is currently not implemented. However, manual activation is actively used [3]. Let's simplify for now and re-add when really (ever?) needed. [1] https://lkml.kernel.org/r/154510700291.1941238.817190985966612531.stgit@dwillia2-desk3.amr.corp.intel.com [2] https://lkml.kernel.org/r/154690326478.676627.103843791978176914.stgit@dwillia2-desk3.amr.corp.intel.com [3] https://lkml.kernel.org/r/CAPcyv4irwGUU2x+c6b4L=KbB1dnasNKaaZd6oSpYjL9kfsnROQ@mail.gmail.com Signed-off-by: David Hildenbrand <david@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Huang Ying <ying.huang@intel.com> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Dan Williams <dan.j.williams@intel.com> Link: http://lkml.kernel.org/r/20200624094741.9918-4-david@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/shuffle.h')
-rw-r--r--mm/shuffle.h17
1 files changed, 0 insertions, 17 deletions
diff --git a/mm/shuffle.h b/mm/shuffle.h
index 4d79f03b6658..71b784f0b7c3 100644
--- a/mm/shuffle.h
+++ b/mm/shuffle.h
@@ -4,23 +4,10 @@
#define _MM_SHUFFLE_H
#include <linux/jump_label.h>
-/*
- * SHUFFLE_ENABLE is called from the command line enabling path, or by
- * platform-firmware enabling that indicates the presence of a
- * direct-mapped memory-side-cache. SHUFFLE_FORCE_DISABLE is called from
- * the command line path and overrides any previous or future
- * SHUFFLE_ENABLE.
- */
-enum mm_shuffle_ctl {
- SHUFFLE_ENABLE,
- SHUFFLE_FORCE_DISABLE,
-};
-
#define SHUFFLE_ORDER (MAX_ORDER-1)
#ifdef CONFIG_SHUFFLE_PAGE_ALLOCATOR
DECLARE_STATIC_KEY_FALSE(page_alloc_shuffle_key);
-extern void page_alloc_shuffle(enum mm_shuffle_ctl ctl);
extern void __shuffle_free_memory(pg_data_t *pgdat);
extern bool shuffle_pick_tail(void);
static inline void shuffle_free_memory(pg_data_t *pgdat)
@@ -58,10 +45,6 @@ static inline void shuffle_zone(struct zone *z)
{
}
-static inline void page_alloc_shuffle(enum mm_shuffle_ctl ctl)
-{
-}
-
static inline bool is_shuffle_order(int order)
{
return false;