From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/mm/percpu-stats.c | 55 ++++++++++++++++++++++++++++++++++---------------------
1 files changed, 34 insertions(+), 21 deletions(-)
diff --git a/kernel/mm/percpu-stats.c b/kernel/mm/percpu-stats.c
index b5fdd43..f6026db 100644
--- a/kernel/mm/percpu-stats.c
+++ b/kernel/mm/percpu-stats.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* mm/percpu-debug.c
*
* Copyright (C) 2017 Facebook Inc.
- * Copyright (C) 2017 Dennis Zhou <dennisz@fb.com>
- *
- * This file is released under the GPLv2.
+ * Copyright (C) 2017 Dennis Zhou <dennis@kernel.org>
*
* Prints statistics about the percpu allocator and backing chunks.
*/
@@ -35,11 +34,15 @@
{
struct pcpu_chunk *chunk;
int slot, max_nr_alloc;
+ enum pcpu_chunk_type type;
max_nr_alloc = 0;
- for (slot = 0; slot < pcpu_nr_slots; slot++)
- list_for_each_entry(chunk, &pcpu_slot[slot], list)
- max_nr_alloc = max(max_nr_alloc, chunk->nr_alloc);
+ for (type = 0; type < PCPU_NR_CHUNK_TYPES; type++)
+ for (slot = 0; slot < pcpu_nr_slots; slot++)
+ list_for_each_entry(chunk, &pcpu_chunk_list(type)[slot],
+ list)
+ max_nr_alloc = max(max_nr_alloc,
+ chunk->nr_alloc);
return max_nr_alloc;
}
@@ -53,6 +56,7 @@
static void chunk_map_stats(struct seq_file *m, struct pcpu_chunk *chunk,
int *buffer)
{
+ struct pcpu_block_md *chunk_md = &chunk->chunk_md;
int i, last_alloc, as_len, start, end;
int *alloc_sizes, *p;
/* statistics */
@@ -121,14 +125,17 @@
P("nr_alloc", chunk->nr_alloc);
P("max_alloc_size", chunk->max_alloc_size);
P("empty_pop_pages", chunk->nr_empty_pop_pages);
- P("first_bit", chunk->first_bit);
+ P("first_bit", chunk_md->first_free);
P("free_bytes", chunk->free_bytes);
- P("contig_bytes", chunk->contig_bits * PCPU_MIN_ALLOC_SIZE);
+ P("contig_bytes", chunk_md->contig_hint * PCPU_MIN_ALLOC_SIZE);
P("sum_frag", sum_frag);
P("max_frag", max_frag);
P("cur_min_alloc", cur_min_alloc);
P("cur_med_alloc", cur_med_alloc);
P("cur_max_alloc", cur_max_alloc);
+#ifdef CONFIG_MEMCG_KMEM
+ P("memcg_aware", pcpu_is_memcg_chunk(pcpu_chunk_type(chunk)));
+#endif
seq_putc(m, '\n');
}
@@ -137,6 +144,8 @@
struct pcpu_chunk *chunk;
int slot, max_nr_alloc;
int *buffer;
+ enum pcpu_chunk_type type;
+ int nr_empty_pop_pages;
alloc_buffer:
spin_lock_irq(&pcpu_lock);
@@ -157,7 +166,11 @@
goto alloc_buffer;
}
-#define PL(X) \
+ nr_empty_pop_pages = 0;
+ for (type = 0; type < PCPU_NR_CHUNK_TYPES; type++)
+ nr_empty_pop_pages += pcpu_nr_empty_pop_pages[type];
+
+#define PL(X) \
seq_printf(m, " %-20s: %12lld\n", #X, (long long int)pcpu_stats_ai.X)
seq_printf(m,
@@ -188,7 +201,7 @@
PU(nr_max_chunks);
PU(min_alloc_size);
PU(max_alloc_size);
- P("empty_pop_pages", pcpu_nr_empty_pop_pages);
+ P("empty_pop_pages", nr_empty_pop_pages);
seq_putc(m, '\n');
#undef PU
@@ -202,18 +215,18 @@
chunk_map_stats(m, pcpu_reserved_chunk, buffer);
}
- for (slot = 0; slot < pcpu_nr_slots; slot++) {
- list_for_each_entry(chunk, &pcpu_slot[slot], list) {
- if (chunk == pcpu_first_chunk) {
- seq_puts(m, "Chunk: <- First Chunk\n");
- chunk_map_stats(m, chunk, buffer);
-
-
- } else {
- seq_puts(m, "Chunk:\n");
- chunk_map_stats(m, chunk, buffer);
+ for (type = 0; type < PCPU_NR_CHUNK_TYPES; type++) {
+ for (slot = 0; slot < pcpu_nr_slots; slot++) {
+ list_for_each_entry(chunk, &pcpu_chunk_list(type)[slot],
+ list) {
+ if (chunk == pcpu_first_chunk) {
+ seq_puts(m, "Chunk: <- First Chunk\n");
+ chunk_map_stats(m, chunk, buffer);
+ } else {
+ seq_puts(m, "Chunk:\n");
+ chunk_map_stats(m, chunk, buffer);
+ }
}
-
}
}
--
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