mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 16:38:12 +00:00
f67bed134a
Add call_site, bytes_alloc and gfp_flags fields to the output of the percpu_alloc_percpu ftrace event: mkdir-4393 [001] 169.334788: percpu_alloc_percpu: call_site=mem_cgroup_css_alloc+0xa6 reserved=0 is_atomic=0 size=2408 align=8 base_addr=0xffffc7117fc00000 off=402176 ptr=0x3dc867a62300 bytes_alloc=14448 gfp_flags=GFP_KERNEL_ACCOUNT This is required to track memcg-accounted percpu allocations. Link: https://lkml.kernel.org/r/a07be858-c8a3-7851-9086-e3262cbcf707@openvz.org Signed-off-by: Vasily Averin <vvs@openvz.org> Acked-by: Roman Gushchin <roman.gushchin@linux.dev> Cc: Shakeel Butt <shakeelb@google.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Michal Hocko <mhocko@suse.com> Cc: Dennis Zhou <dennis@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
257 lines
7 KiB
C
257 lines
7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _MM_PERCPU_INTERNAL_H
|
|
#define _MM_PERCPU_INTERNAL_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/percpu.h>
|
|
|
|
/*
|
|
* pcpu_block_md is the metadata block struct.
|
|
* Each chunk's bitmap is split into a number of full blocks.
|
|
* All units are in terms of bits.
|
|
*
|
|
* The scan hint is the largest known contiguous area before the contig hint.
|
|
* It is not necessarily the actual largest contig hint though. There is an
|
|
* invariant that the scan_hint_start > contig_hint_start iff
|
|
* scan_hint == contig_hint. This is necessary because when scanning forward,
|
|
* we don't know if a new contig hint would be better than the current one.
|
|
*/
|
|
struct pcpu_block_md {
|
|
int scan_hint; /* scan hint for block */
|
|
int scan_hint_start; /* block relative starting
|
|
position of the scan hint */
|
|
int contig_hint; /* contig hint for block */
|
|
int contig_hint_start; /* block relative starting
|
|
position of the contig hint */
|
|
int left_free; /* size of free space along
|
|
the left side of the block */
|
|
int right_free; /* size of free space along
|
|
the right side of the block */
|
|
int first_free; /* block position of first free */
|
|
int nr_bits; /* total bits responsible for */
|
|
};
|
|
|
|
struct pcpu_chunk {
|
|
#ifdef CONFIG_PERCPU_STATS
|
|
int nr_alloc; /* # of allocations */
|
|
size_t max_alloc_size; /* largest allocation size */
|
|
#endif
|
|
|
|
struct list_head list; /* linked to pcpu_slot lists */
|
|
int free_bytes; /* free bytes in the chunk */
|
|
struct pcpu_block_md chunk_md;
|
|
void *base_addr; /* base address of this chunk */
|
|
|
|
unsigned long *alloc_map; /* allocation map */
|
|
unsigned long *bound_map; /* boundary map */
|
|
struct pcpu_block_md *md_blocks; /* metadata blocks */
|
|
|
|
void *data; /* chunk data */
|
|
bool immutable; /* no [de]population allowed */
|
|
bool isolated; /* isolated from active chunk
|
|
slots */
|
|
int start_offset; /* the overlap with the previous
|
|
region to have a page aligned
|
|
base_addr */
|
|
int end_offset; /* additional area required to
|
|
have the region end page
|
|
aligned */
|
|
#ifdef CONFIG_MEMCG_KMEM
|
|
struct obj_cgroup **obj_cgroups; /* vector of object cgroups */
|
|
#endif
|
|
|
|
int nr_pages; /* # of pages served by this chunk */
|
|
int nr_populated; /* # of populated pages */
|
|
int nr_empty_pop_pages; /* # of empty populated pages */
|
|
unsigned long populated[]; /* populated bitmap */
|
|
};
|
|
|
|
extern spinlock_t pcpu_lock;
|
|
|
|
extern struct list_head *pcpu_chunk_lists;
|
|
extern int pcpu_nr_slots;
|
|
extern int pcpu_sidelined_slot;
|
|
extern int pcpu_to_depopulate_slot;
|
|
extern int pcpu_nr_empty_pop_pages;
|
|
|
|
extern struct pcpu_chunk *pcpu_first_chunk;
|
|
extern struct pcpu_chunk *pcpu_reserved_chunk;
|
|
|
|
/**
|
|
* pcpu_chunk_nr_blocks - converts nr_pages to # of md_blocks
|
|
* @chunk: chunk of interest
|
|
*
|
|
* This conversion is from the number of physical pages that the chunk
|
|
* serves to the number of bitmap blocks used.
|
|
*/
|
|
static inline int pcpu_chunk_nr_blocks(struct pcpu_chunk *chunk)
|
|
{
|
|
return chunk->nr_pages * PAGE_SIZE / PCPU_BITMAP_BLOCK_SIZE;
|
|
}
|
|
|
|
/**
|
|
* pcpu_nr_pages_to_map_bits - converts the pages to size of bitmap
|
|
* @pages: number of physical pages
|
|
*
|
|
* This conversion is from physical pages to the number of bits
|
|
* required in the bitmap.
|
|
*/
|
|
static inline int pcpu_nr_pages_to_map_bits(int pages)
|
|
{
|
|
return pages * PAGE_SIZE / PCPU_MIN_ALLOC_SIZE;
|
|
}
|
|
|
|
/**
|
|
* pcpu_chunk_map_bits - helper to convert nr_pages to size of bitmap
|
|
* @chunk: chunk of interest
|
|
*
|
|
* This conversion is from the number of physical pages that the chunk
|
|
* serves to the number of bits in the bitmap.
|
|
*/
|
|
static inline int pcpu_chunk_map_bits(struct pcpu_chunk *chunk)
|
|
{
|
|
return pcpu_nr_pages_to_map_bits(chunk->nr_pages);
|
|
}
|
|
|
|
/**
|
|
* pcpu_obj_full_size - helper to calculate size of each accounted object
|
|
* @size: size of area to allocate in bytes
|
|
*
|
|
* For each accounted object there is an extra space which is used to store
|
|
* obj_cgroup membership. Charge it too.
|
|
*/
|
|
static inline size_t pcpu_obj_full_size(size_t size)
|
|
{
|
|
size_t extra_size = 0;
|
|
|
|
#ifdef CONFIG_MEMCG_KMEM
|
|
extra_size += size / PCPU_MIN_ALLOC_SIZE * sizeof(struct obj_cgroup *);
|
|
#endif
|
|
|
|
return size * num_possible_cpus() + extra_size;
|
|
}
|
|
|
|
#ifdef CONFIG_PERCPU_STATS
|
|
|
|
#include <linux/spinlock.h>
|
|
|
|
struct percpu_stats {
|
|
u64 nr_alloc; /* lifetime # of allocations */
|
|
u64 nr_dealloc; /* lifetime # of deallocations */
|
|
u64 nr_cur_alloc; /* current # of allocations */
|
|
u64 nr_max_alloc; /* max # of live allocations */
|
|
u32 nr_chunks; /* current # of live chunks */
|
|
u32 nr_max_chunks; /* max # of live chunks */
|
|
size_t min_alloc_size; /* min allocation size */
|
|
size_t max_alloc_size; /* max allocation size */
|
|
};
|
|
|
|
extern struct percpu_stats pcpu_stats;
|
|
extern struct pcpu_alloc_info pcpu_stats_ai;
|
|
|
|
/*
|
|
* For debug purposes. We don't care about the flexible array.
|
|
*/
|
|
static inline void pcpu_stats_save_ai(const struct pcpu_alloc_info *ai)
|
|
{
|
|
memcpy(&pcpu_stats_ai, ai, sizeof(struct pcpu_alloc_info));
|
|
|
|
/* initialize min_alloc_size to unit_size */
|
|
pcpu_stats.min_alloc_size = pcpu_stats_ai.unit_size;
|
|
}
|
|
|
|
/*
|
|
* pcpu_stats_area_alloc - increment area allocation stats
|
|
* @chunk: the location of the area being allocated
|
|
* @size: size of area to allocate in bytes
|
|
*
|
|
* CONTEXT:
|
|
* pcpu_lock.
|
|
*/
|
|
static inline void pcpu_stats_area_alloc(struct pcpu_chunk *chunk, size_t size)
|
|
{
|
|
lockdep_assert_held(&pcpu_lock);
|
|
|
|
pcpu_stats.nr_alloc++;
|
|
pcpu_stats.nr_cur_alloc++;
|
|
pcpu_stats.nr_max_alloc =
|
|
max(pcpu_stats.nr_max_alloc, pcpu_stats.nr_cur_alloc);
|
|
pcpu_stats.min_alloc_size =
|
|
min(pcpu_stats.min_alloc_size, size);
|
|
pcpu_stats.max_alloc_size =
|
|
max(pcpu_stats.max_alloc_size, size);
|
|
|
|
chunk->nr_alloc++;
|
|
chunk->max_alloc_size = max(chunk->max_alloc_size, size);
|
|
}
|
|
|
|
/*
|
|
* pcpu_stats_area_dealloc - decrement allocation stats
|
|
* @chunk: the location of the area being deallocated
|
|
*
|
|
* CONTEXT:
|
|
* pcpu_lock.
|
|
*/
|
|
static inline void pcpu_stats_area_dealloc(struct pcpu_chunk *chunk)
|
|
{
|
|
lockdep_assert_held(&pcpu_lock);
|
|
|
|
pcpu_stats.nr_dealloc++;
|
|
pcpu_stats.nr_cur_alloc--;
|
|
|
|
chunk->nr_alloc--;
|
|
}
|
|
|
|
/*
|
|
* pcpu_stats_chunk_alloc - increment chunk stats
|
|
*/
|
|
static inline void pcpu_stats_chunk_alloc(void)
|
|
{
|
|
unsigned long flags;
|
|
spin_lock_irqsave(&pcpu_lock, flags);
|
|
|
|
pcpu_stats.nr_chunks++;
|
|
pcpu_stats.nr_max_chunks =
|
|
max(pcpu_stats.nr_max_chunks, pcpu_stats.nr_chunks);
|
|
|
|
spin_unlock_irqrestore(&pcpu_lock, flags);
|
|
}
|
|
|
|
/*
|
|
* pcpu_stats_chunk_dealloc - decrement chunk stats
|
|
*/
|
|
static inline void pcpu_stats_chunk_dealloc(void)
|
|
{
|
|
unsigned long flags;
|
|
spin_lock_irqsave(&pcpu_lock, flags);
|
|
|
|
pcpu_stats.nr_chunks--;
|
|
|
|
spin_unlock_irqrestore(&pcpu_lock, flags);
|
|
}
|
|
|
|
#else
|
|
|
|
static inline void pcpu_stats_save_ai(const struct pcpu_alloc_info *ai)
|
|
{
|
|
}
|
|
|
|
static inline void pcpu_stats_area_alloc(struct pcpu_chunk *chunk, size_t size)
|
|
{
|
|
}
|
|
|
|
static inline void pcpu_stats_area_dealloc(struct pcpu_chunk *chunk)
|
|
{
|
|
}
|
|
|
|
static inline void pcpu_stats_chunk_alloc(void)
|
|
{
|
|
}
|
|
|
|
static inline void pcpu_stats_chunk_dealloc(void)
|
|
{
|
|
}
|
|
|
|
#endif /* !CONFIG_PERCPU_STATS */
|
|
|
|
#endif
|