From: Li Chen <[email protected]> The on-media cache_info index used sizeof(struct) instead of the 4K metadata stride, so gc_percent updates from dmsetup message were written between slots and lost after reboot. Use PCACHE_CACHE_INFO_SIZE in get_cache_info_addr() and align info_index with the slot returned by pcache_meta_find_latest().
Signed-off-by: Li Chen <[email protected]> Signed-off-by: Dongsheng Yang <[email protected]> Reviewed-by: Zheng Gu <[email protected]> Cc: [email protected] # 6.18 --- drivers/md/dm-pcache/cache.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm-pcache/cache.c b/drivers/md/dm-pcache/cache.c index d4385d76ac36..534bf07b794f 100644 --- a/drivers/md/dm-pcache/cache.c +++ b/drivers/md/dm-pcache/cache.c @@ -10,7 +10,8 @@ struct kmem_cache *key_cache; static inline struct pcache_cache_info *get_cache_info_addr(struct pcache_cache *cache) { - return cache->cache_info_addr + cache->info_index; + return (struct pcache_cache_info *)((char *)cache->cache_info_addr + + (size_t)cache->info_index * PCACHE_CACHE_INFO_SIZE); } static void cache_info_write(struct pcache_cache *cache) @@ -49,6 +50,8 @@ static int cache_info_init(struct pcache_cache *cache, struct pcache_cache_optio return -EINVAL; } + cache->info_index = ((char *)cache_info_addr - (char *)cache->cache_info_addr) / PCACHE_CACHE_INFO_SIZE; + return 0; } -- 2.43.0
