13cf871a13
Global free cacheline list is divided into a set of freelists, one per execution context. When attempting to map addres to cache, first the freelist for current execution context is considered (fast path). If current execution context freelist is empty (fast path failure), mapping function attempts to get freelist from other execution context list (slow path). The purpose of this change is improve concurrency in freelist access. It is part of fine granularity metadata lock implementation. Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/*
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* Copyright(c) 2012-2018 Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause-Clear
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*/
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#ifndef __METADATA_SUPERBLOCK_H__
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#define __METADATA_SUPERBLOCK_H__
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#include <ocf/ocf_def.h>
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#include <ocf/ocf_def.h>
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#define CACHE_MAGIC_NUMBER 0x187E1CA6
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/**
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* @brief OCF cache metadata configuration superblock
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*/
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struct ocf_superblock_config {
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/** WARNING: Metadata probe disregards metadata version when
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* checking if the cache is dirty - position of next two fields
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* shouldn't change!! */
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uint8_t clean_shutdown;
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uint8_t dirty_flushed;
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uint32_t magic_number;
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uint32_t metadata_version;
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/* Currently set cache mode */
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ocf_cache_mode_t cache_mode;
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char name[OCF_CACHE_NAME_SIZE];
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ocf_cache_line_t cachelines;
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uint32_t valid_parts_no;
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ocf_cache_line_size_t line_size;
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ocf_metadata_layout_t metadata_layout;
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uint32_t core_count;
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unsigned long valid_core_bitmap[(OCF_CORE_MAX /
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(sizeof(unsigned long) * 8)) + 1];
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ocf_cleaning_t cleaning_policy_type;
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struct cleaning_policy_config cleaning[CLEANING_POLICY_TYPE_MAX];
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ocf_eviction_t eviction_policy_type;
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ocf_promotion_t promotion_policy_type;
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/* Current core sequence number */
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ocf_core_id_t curr_core_seq_no;
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/*
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* Checksum for each metadata region.
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* This field has to be the last one!
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*/
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uint32_t checksum[metadata_segment_max];
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};
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/**
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* @brief OCF cache metadata runtime superblock
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*/
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struct ocf_superblock_runtime {
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uint32_t cleaning_thread_access;
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};
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static inline void ocf_metadata_set_shutdown_status(ocf_cache_t cache,
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enum ocf_metadata_shutdown_status shutdown_status,
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ocf_metadata_end_t cmpl, void *priv)
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{
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cache->metadata.iface.set_shutdown_status(cache, shutdown_status,
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cmpl, priv);
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}
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static inline void ocf_metadata_load_superblock(ocf_cache_t cache,
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ocf_metadata_end_t cmpl, void *priv)
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{
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cache->metadata.iface.load_superblock(cache, cmpl, priv);
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}
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static inline void ocf_metadata_flush_superblock(ocf_cache_t cache,
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ocf_metadata_end_t cmpl, void *priv)
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{
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cache->metadata.iface.flush_superblock(cache, cmpl, priv);
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}
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#endif /* METADATA_SUPERBLOCK_H_ */
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