[PATCH v3 31/35] lib: add memory allocations report in show_mem()
From: Suren Baghdasaryan <surenb@google.com>
Date: 2024-02-12 21:40:40
Also in:
cgroups, linux-arch, linux-doc, linux-fsdevel, linux-iommu, linux-mm, lkml
Subsystem:
library code, memory allocation profiling, memory management, memory management - page allocator, the rest · Maintainers:
Andrew Morton, Suren Baghdasaryan, Kent Overstreet, Vlastimil Babka, Linus Torvalds
Include allocations in show_mem reports. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com> --- include/linux/alloc_tag.h | 2 ++ lib/alloc_tag.c | 38 ++++++++++++++++++++++++++++++++++++++ mm/show_mem.c | 15 +++++++++++++++ 3 files changed, 55 insertions(+)
diff --git a/include/linux/alloc_tag.h b/include/linux/alloc_tag.h
index 3fe51e67e231..0a5973c4ad77 100644
--- a/include/linux/alloc_tag.h
+++ b/include/linux/alloc_tag.h@@ -30,6 +30,8 @@ struct alloc_tag { #ifdef CONFIG_MEM_ALLOC_PROFILING +void alloc_tags_show_mem_report(struct seq_buf *s); + static inline struct alloc_tag *ct_to_alloc_tag(struct codetag *ct) { return container_of(ct, struct alloc_tag, ct);
diff --git a/lib/alloc_tag.c b/lib/alloc_tag.c
index 2d5226d9262d..54312c213860 100644
--- a/lib/alloc_tag.c
+++ b/lib/alloc_tag.c@@ -96,6 +96,44 @@ static const struct seq_operations allocinfo_seq_op = { .show = allocinfo_show, }; +void alloc_tags_show_mem_report(struct seq_buf *s) +{ + struct codetag_iterator iter; + struct codetag *ct; + struct { + struct codetag *tag; + size_t bytes; + } tags[10], n; + unsigned int i, nr = 0; + + codetag_lock_module_list(alloc_tag_cttype, true); + iter = codetag_get_ct_iter(alloc_tag_cttype); + while ((ct = codetag_next_ct(&iter))) { + struct alloc_tag_counters counter = alloc_tag_read(ct_to_alloc_tag(ct)); + + n.tag = ct; + n.bytes = counter.bytes; + + for (i = 0; i < nr; i++) + if (n.bytes > tags[i].bytes) + break; + + if (i < ARRAY_SIZE(tags)) { + nr -= nr == ARRAY_SIZE(tags); + memmove(&tags[i + 1], + &tags[i], + sizeof(tags[0]) * (nr - i)); + nr++; + tags[i] = n; + } + } + + for (i = 0; i < nr; i++) + alloc_tag_to_text(s, tags[i].tag); + + codetag_lock_module_list(alloc_tag_cttype, false); +} + static void __init procfs_init(void) { proc_create_seq("allocinfo", 0444, NULL, &allocinfo_seq_op);
diff --git a/mm/show_mem.c b/mm/show_mem.c
index 8dcfafbd283c..d514c15ca076 100644
--- a/mm/show_mem.c
+++ b/mm/show_mem.c@@ -12,6 +12,7 @@ #include <linux/hugetlb.h> #include <linux/mm.h> #include <linux/mmzone.h> +#include <linux/seq_buf.h> #include <linux/swap.h> #include <linux/vmstat.h>
@@ -423,4 +424,18 @@ void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx) #ifdef CONFIG_MEMORY_FAILURE printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages)); #endif +#ifdef CONFIG_MEM_ALLOC_PROFILING + { + struct seq_buf s; + char *buf = kmalloc(4096, GFP_ATOMIC); + + if (buf) { + printk("Memory allocations:\n"); + seq_buf_init(&s, buf, 4096); + alloc_tags_show_mem_report(&s); + printk("%s", buf); + kfree(buf); + } + } +#endif }
--
2.43.0.687.g38aa6559b0-goog