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| author | Richard Chang <richardycc@google.com> | 2024-02-28 05:11:17 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-03-04 17:01:27 -0800 |
| commit | c8b36003121834cb77fcaf8a1ce0a454d7a97891 (patch) | |
| tree | 5e354699da762570795a258d5a559b5528f3c53c /mm/internal.h | |
| parent | 435a75548109f19e5b5b14ae35b9acb063c084e9 (diff) | |
| download | lwn-c8b36003121834cb77fcaf8a1ce0a454d7a97891.tar.gz lwn-c8b36003121834cb77fcaf8a1ce0a454d7a97891.zip | |
mm: add alloc_contig_migrate_range allocation statistics
alloc_contig_migrate_range has every information to be able to understand
big contiguous allocation latency. For example, how many pages are
migrated, how many times they were needed to unmap from page tables.
This patch adds the trace event to collect the allocation statistics. In
the field, it was quite useful to understand CMA allocation latency.
[akpm@linux-foundation.org: a/trace_mm_alloc_config_migrate_range_info_enabled/trace_mm_alloc_contig_migrate_range_info_enabled]
Link: https://lkml.kernel.org/r/20240228051127.2859472-1-richardycc@google.com
Signed-off-by: Richard Chang <richardycc@google.com>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org.
Cc: Martin Liu <liumartin@google.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/internal.h b/mm/internal.h index b1d806125e8d..5be91e2f9943 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -539,7 +539,8 @@ isolate_migratepages_range(struct compact_control *cc, unsigned long low_pfn, unsigned long end_pfn); int __alloc_contig_migrate_range(struct compact_control *cc, - unsigned long start, unsigned long end); + unsigned long start, unsigned long end, + int migratetype); /* Free whole pageblock and set its migration type to MIGRATE_CMA. */ void init_cma_reserved_pageblock(struct page *page); |