user/sven/linux.git/kernel/power/main.c, branch v6.10

PM: sleep: stats: Use locking in dpm_save_failed_dev()

2024-02-05T13:28:54Z

Because dpm_save_failed_dev() may be called simultaneously by multiple failing device PM functions, the state of the suspend_stats fields updated by it may become inconsistent. Prevent that from happening by using a lock in dpm_save_failed_dev(). Signed-off-by: Rafael J. Wysocki Reviewed-by: Stanislaw Gruszka Reviewed-by: Ulf Hansson

PM: sleep: stats: Define suspend_stats next to the code using it

2024-02-05T13:28:19Z

It is not necessary to define struct suspend_stats in a header file and the suspend_stats variable in the core device system-wide PM code. They both can be defined in kernel/power/main.c, next to the sysfs and debugfs code accessing suspend_stats, which can be static. Modify the code in question in accordance with the above observation and replace the static inline functions manipulating suspend_stats with regular ones defined in kernel/power/main.c. While at it, move the enum suspend_stat_step to the end of suspend.h which is a more suitable place for it. No intentional functional impact. Signed-off-by: Rafael J. Wysocki Reviewed-by: Ulf Hansson

PM: sleep: stats: Use unsigned int for success and failure counters

2024-02-05T13:26:27Z

Change the type of the "success" and "fail" fields in struct suspend_stats to unsigned int, because they cannot be negative. No intentional functional impact. Signed-off-by: Rafael J. Wysocki Reviewed-by: Stanislaw Gruszka Reviewed-by: Ulf Hansson

PM: sleep: stats: Use an array of step failure counters

2024-02-05T13:25:56Z

Instead of using a set of individual struct suspend_stats fields representing suspend step failure counters, use an array of counters indexed by enum suspend_stat_step for this purpose, which allows dpm_save_failed_step() to increment the appropriate counter automatically, so that its callers don't need to do that directly. It also allows suspend_stats_show() to carry out a loop over the counters array to print their values. Because the counters cannot become negative, use unsigned int for representing them. The only user-observable impact of this change is a different ordering of entries in the suspend_stats debugfs file which is not expected to matter. Signed-off-by: Rafael J. Wysocki Reviewed-by: Stanislaw Gruszka Reviewed-by: Ulf Hansson

PM: sleep: stats: Use array of suspend step names

2024-02-05T13:21:24Z

Replace suspend_step_name() in the suspend statistics code with an array of suspend step names which has fewer lines of code and less overhead. While at it, remove two unnecessary line breaks in suspend_stats_show() and adjust some white space in there to the kernel coding style for a more consistent code layout. No intentional functional impact. Signed-off-by: Rafael J. Wysocki Reviewed-by: Stanislaw Gruszka Reviewed-by: Ulf Hansson

PM: sleep: Remove obsolete comment from unlock_system_sleep()

2023-12-20T18:16:55Z

With the freezer changes introduced by commit f5d39b020809 ("freezer,sched: Rewrite core freezer logic"), the comment in unlock_system_sleep() has become obsolete, there is no need to retain it. Signed-off-by: Kevin Hao Signed-off-by: Rafael J. Wysocki

Merge tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2023-06-28T17:28:11Z

Pull mm updates from Andrew Morton: - Yosry Ahmed brought back some cgroup v1 stats in OOM logs - Yosry has also eliminated cgroup's atomic rstat flushing - Nhat Pham adds the new cachestat() syscall. It provides userspace with the ability to query pagecache status - a similar concept to mincore() but more powerful and with improved usability - Mel Gorman provides more optimizations for compaction, reducing the prevalence of page rescanning - Lorenzo Stoakes has done some maintanance work on the get_user_pages() interface - Liam Howlett continues with cleanups and maintenance work to the maple tree code. Peng Zhang also does some work on maple tree - Johannes Weiner has done some cleanup work on the compaction code - David Hildenbrand has contributed additional selftests for get_user_pages() - Thomas Gleixner has contributed some maintenance and optimization work for the vmalloc code - Baolin Wang has provided some compaction cleanups, - SeongJae Park continues maintenance work on the DAMON code - Huang Ying has done some maintenance on the swap code's usage of device refcounting - Christoph Hellwig has some cleanups for the filemap/directio code - Ryan Roberts provides two patch series which yield some rationalization of the kernel's access to pte entries - use the provided APIs rather than open-coding accesses - Lorenzo Stoakes has some fixes to the interaction between pagecache and directio access to file mappings - John Hubbard has a series of fixes to the MM selftesting code - ZhangPeng continues the folio conversion campaign - Hugh Dickins has been working on the pagetable handling code, mainly with a view to reducing the load on the mmap_lock - Catalin Marinas has reduced the arm64 kmalloc() minimum alignment from 128 to 8 - Domenico Cerasuolo has improved the zswap reclaim mechanism by reorganizing the LRU management - Matthew Wilcox provides some fixups to make gfs2 work better with the buffer_head code - Vishal Moola also has done some folio conversion work - Matthew Wilcox has removed the remnants of the pagevec code - their functionality is migrated over to struct folio_batch * tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (380 commits) mm/hugetlb: remove hugetlb_set_page_subpool() mm: nommu: correct the range of mmap_sem_read_lock in task_mem() hugetlb: revert use of page_cache_next_miss() Revert "page cache: fix page_cache_next/prev_miss off by one" mm/vmscan: fix root proactive reclaim unthrottling unbalanced node mm: memcg: rename and document global_reclaim() mm: kill [add|del]_page_to_lru_list() mm: compaction: convert to use a folio in isolate_migratepages_block() mm: zswap: fix double invalidate with exclusive loads mm: remove unnecessary pagevec includes mm: remove references to pagevec mm: rename invalidate_mapping_pagevec to mapping_try_invalidate mm: remove struct pagevec net: convert sunrpc from pagevec to folio_batch i915: convert i915_gpu_error to use a folio_batch pagevec: rename fbatch_count() mm: remove check_move_unevictable_pages() drm: convert drm_gem_put_pages() to use a folio_batch i915: convert shmem_sg_free_table() to use a folio_batch scatterlist: add sg_set_folio() ...

include/linux/suspend.h: Only show pm_pr_dbg messages at suspend/resume

2023-06-12T17:56:08Z

All uses in the kernel are currently already oriented around suspend/resume. As some other parts of the kernel may also use these messages in functions that could also be used outside of suspend/resume, only enable in suspend/resume path. Signed-off-by: Mario Limonciello Signed-off-by: Rafael J. Wysocki

mm: page_alloc: move pm_* function into power

2023-06-09T23:25:24Z

pm_restrict_gfp_mask()/pm_restore_gfp_mask() only used in power, let's move them out of page_alloc.c. Adding a general gfp_has_io_fs() function which return true if gfp with both __GFP_IO and __GFP_FS flags, then use it inside of pm_suspended_storage(), also the pm_suspended_storage() is moved into suspend.h. Link: https://lkml.kernel.org/r/20230516063821.121844-11-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang Cc: David Hildenbrand Cc: "Huang, Ying" Cc: Iurii Zaikin Cc: Kees Cook Cc: Len Brown Cc: Luis Chamberlain Cc: Mike Rapoport (IBM) Cc: Oscar Salvador Cc: Pavel Machek Cc: Rafael J. Wysocki Signed-off-by: Andrew Morton

PM: Add sysfs files to represent time spent in hardware sleep state

2023-04-20T17:06:12Z

Userspace can't easily discover how much of a sleep cycle was spent in a hardware sleep state without using kernel tracing and vendor specific sysfs or debugfs files. To make this information more discoverable, introduce 3 new sysfs files: 1) The time spent in a hw sleep state for last cycle. 2) The time spent in a hw sleep state since the kernel booted 3) The maximum time that the hardware can report for a sleep cycle. All of these files will be present only if the system supports s2idle. Reviewed-by: Hans de Goede Signed-off-by: Mario Limonciello Signed-off-by: Rafael J. Wysocki