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authorRichard Chang <richardycc@google.com>2024-02-28 06:11:17 +0100
committerAndrew Morton <akpm@linux-foundation.org>2024-03-05 02:01:27 +0100
commitc8b36003121834cb77fcaf8a1ce0a454d7a97891 (patch)
tree5e354699da762570795a258d5a559b5528f3c53c /mm/zpool.c
parentmm: use folio more widely in __split_huge_page (diff)
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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/zpool.c')
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