mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-27 12:57:53 +00:00
4f5070a5e4
Save and restore the new per-size hugepage enabled setting, if available on the running kernel. Since the number of per-size directories is not fixed, solve this as simply as possible by catering for a maximum number in the thp_settings struct (20). Each array index is the order. The value of THP_NEVER is changed to 0 so that all of these new settings default to THP_NEVER and the user only needs to fill in the ones they want to enable. Link: https://lkml.kernel.org/r/20231207161211.2374093-8-ryan.roberts@arm.com Signed-off-by: Ryan Roberts <ryan.roberts@arm.com> Tested-by: Kefeng Wang <wangkefeng.wang@huawei.com> Tested-by: John Hubbard <jhubbard@nvidia.com> Cc: Alistair Popple <apopple@nvidia.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Barry Song <v-songbaohua@oppo.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Itaru Kitayama <itaru.kitayama@gmail.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Yang Shi <shy828301@gmail.com> Cc: Yin Fengwei <fengwei.yin@intel.com> Cc: Yu Zhao <yuzhao@google.com> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __THP_SETTINGS_H__
|
|
#define __THP_SETTINGS_H__
|
|
|
|
#include <stdbool.h>
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
enum thp_enabled {
|
|
THP_NEVER,
|
|
THP_ALWAYS,
|
|
THP_INHERIT,
|
|
THP_MADVISE,
|
|
};
|
|
|
|
enum thp_defrag {
|
|
THP_DEFRAG_ALWAYS,
|
|
THP_DEFRAG_DEFER,
|
|
THP_DEFRAG_DEFER_MADVISE,
|
|
THP_DEFRAG_MADVISE,
|
|
THP_DEFRAG_NEVER,
|
|
};
|
|
|
|
enum shmem_enabled {
|
|
SHMEM_ALWAYS,
|
|
SHMEM_WITHIN_SIZE,
|
|
SHMEM_ADVISE,
|
|
SHMEM_NEVER,
|
|
SHMEM_DENY,
|
|
SHMEM_FORCE,
|
|
};
|
|
|
|
#define NR_ORDERS 20
|
|
|
|
struct hugepages_settings {
|
|
enum thp_enabled enabled;
|
|
};
|
|
|
|
struct khugepaged_settings {
|
|
bool defrag;
|
|
unsigned int alloc_sleep_millisecs;
|
|
unsigned int scan_sleep_millisecs;
|
|
unsigned int max_ptes_none;
|
|
unsigned int max_ptes_swap;
|
|
unsigned int max_ptes_shared;
|
|
unsigned long pages_to_scan;
|
|
};
|
|
|
|
struct thp_settings {
|
|
enum thp_enabled thp_enabled;
|
|
enum thp_defrag thp_defrag;
|
|
enum shmem_enabled shmem_enabled;
|
|
bool use_zero_page;
|
|
struct khugepaged_settings khugepaged;
|
|
unsigned long read_ahead_kb;
|
|
struct hugepages_settings hugepages[NR_ORDERS];
|
|
};
|
|
|
|
int read_file(const char *path, char *buf, size_t buflen);
|
|
int write_file(const char *path, const char *buf, size_t buflen);
|
|
const unsigned long read_num(const char *path);
|
|
void write_num(const char *path, unsigned long num);
|
|
|
|
int thp_read_string(const char *name, const char * const strings[]);
|
|
void thp_write_string(const char *name, const char *val);
|
|
const unsigned long thp_read_num(const char *name);
|
|
void thp_write_num(const char *name, unsigned long num);
|
|
|
|
void thp_write_settings(struct thp_settings *settings);
|
|
void thp_read_settings(struct thp_settings *settings);
|
|
struct thp_settings *thp_current_settings(void);
|
|
void thp_push_settings(struct thp_settings *settings);
|
|
void thp_pop_settings(void);
|
|
void thp_restore_settings(void);
|
|
void thp_save_settings(void);
|
|
|
|
void thp_set_read_ahead_path(char *path);
|
|
unsigned long thp_supported_orders(void);
|
|
|
|
#endif /* __THP_SETTINGS_H__ */
|