diff options
| author | Zeng Chi <zengchi@kylinos.cn> | 2026-09-21 18:24:42 +0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-09-22 08:36:16 -0700 |
| commit | 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d (patch) | |
| tree | 660d50d4139cb750fbde1ae3432452c20726c99d /drivers/md/bcache/stats.h | |
| download | linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.tar.gz linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.zip | |
KVM: Don't pre-reserve xarray entries when storing empty/NULL attributesgrafted
Skip the xarray reservation loop when clearing all memory attributes, as
storing NULL only erases the entry and never needs to allocate, so no
reservation (and no cleanup of a failed one) is required in that case.
Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'drivers/md/bcache/stats.h')
| -rw-r--r-- | drivers/md/bcache/stats.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/md/bcache/stats.h b/drivers/md/bcache/stats.h new file mode 100644 index 000000000..21b445f8a --- /dev/null +++ b/drivers/md/bcache/stats.h @@ -0,0 +1,62 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _BCACHE_STATS_H_ +#define _BCACHE_STATS_H_ + +struct cache_stat_collector { + atomic_t cache_hits; + atomic_t cache_misses; + atomic_t cache_bypass_hits; + atomic_t cache_bypass_misses; + atomic_t cache_miss_collisions; + atomic_t sectors_bypassed; +}; + +struct cache_stats { + struct kobject kobj; + + unsigned long cache_hits; + unsigned long cache_misses; + unsigned long cache_bypass_hits; + unsigned long cache_bypass_misses; + unsigned long cache_miss_collisions; + unsigned long sectors_bypassed; + + unsigned int rescale; +}; + +struct cache_accounting { + struct closure cl; + struct timer_list timer; + atomic_t closing; + + struct cache_stat_collector collector; + + struct cache_stats total; + struct cache_stats five_minute; + struct cache_stats hour; + struct cache_stats day; +}; + +struct cache_set; +struct cached_dev; +struct bcache_device; + +void bch_cache_accounting_init(struct cache_accounting *acc, + struct closure *parent); + +int bch_cache_accounting_add_kobjs(struct cache_accounting *acc, + struct kobject *parent); + +void bch_cache_accounting_clear(struct cache_accounting *acc); + +void bch_cache_accounting_destroy(struct cache_accounting *acc); + +void bch_mark_cache_accounting(struct cache_set *c, struct bcache_device *d, + bool hit, bool bypass); +void bch_mark_cache_miss_collision(struct cache_set *c, + struct bcache_device *d); +void bch_mark_sectors_bypassed(struct cache_set *c, + struct cached_dev *dc, + int sectors); + +#endif /* _BCACHE_STATS_H_ */ |