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2e6d88e9d4
Add shmem mTHP collpase testing. Similar to the anonymous page, users can use the '-s' parameter to specify the shmem mTHP size for testing. Link: https://lkml.kernel.org/r/fa44bfa20ca5b9fd6f9163a048f3d3c1e53cd0a8.1724140601.git.baolin.wang@linux.alibaba.com Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Barry Song <21cnbao@gmail.com> Cc: David Hildenbrand <david@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Yang Shi <shy828301@gmail.com> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __THP_SETTINGS_H__
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#define __THP_SETTINGS_H__
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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enum thp_enabled {
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THP_NEVER,
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THP_ALWAYS,
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THP_INHERIT,
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THP_MADVISE,
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};
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enum thp_defrag {
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THP_DEFRAG_ALWAYS,
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THP_DEFRAG_DEFER,
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THP_DEFRAG_DEFER_MADVISE,
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THP_DEFRAG_MADVISE,
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THP_DEFRAG_NEVER,
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};
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enum shmem_enabled {
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SHMEM_NEVER,
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SHMEM_ALWAYS,
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SHMEM_WITHIN_SIZE,
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SHMEM_ADVISE,
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SHMEM_INHERIT,
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SHMEM_DENY,
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SHMEM_FORCE,
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};
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#define NR_ORDERS 20
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struct hugepages_settings {
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enum thp_enabled enabled;
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};
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struct khugepaged_settings {
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bool defrag;
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unsigned int alloc_sleep_millisecs;
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unsigned int scan_sleep_millisecs;
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unsigned int max_ptes_none;
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unsigned int max_ptes_swap;
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unsigned int max_ptes_shared;
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unsigned long pages_to_scan;
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};
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struct shmem_hugepages_settings {
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enum shmem_enabled enabled;
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};
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struct thp_settings {
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enum thp_enabled thp_enabled;
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enum thp_defrag thp_defrag;
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enum shmem_enabled shmem_enabled;
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bool use_zero_page;
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struct khugepaged_settings khugepaged;
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unsigned long read_ahead_kb;
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struct hugepages_settings hugepages[NR_ORDERS];
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struct shmem_hugepages_settings shmem_hugepages[NR_ORDERS];
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};
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int read_file(const char *path, char *buf, size_t buflen);
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int write_file(const char *path, const char *buf, size_t buflen);
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const unsigned long read_num(const char *path);
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void write_num(const char *path, unsigned long num);
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int thp_read_string(const char *name, const char * const strings[]);
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void thp_write_string(const char *name, const char *val);
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const unsigned long thp_read_num(const char *name);
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void thp_write_num(const char *name, unsigned long num);
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void thp_write_settings(struct thp_settings *settings);
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void thp_read_settings(struct thp_settings *settings);
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struct thp_settings *thp_current_settings(void);
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void thp_push_settings(struct thp_settings *settings);
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void thp_pop_settings(void);
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void thp_restore_settings(void);
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void thp_save_settings(void);
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void thp_set_read_ahead_path(char *path);
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unsigned long thp_supported_orders(void);
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unsigned long thp_shmem_supported_orders(void);
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#endif /* __THP_SETTINGS_H__ */
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