Function dfs_pcache_release

components/dfs/dfs_v2/src/dfs_pcache.c:152–188

* @brief Release page cache entries to free up memory * * This function attempts to release a specified number of page cache entries. * If count is 0, it calculates the number of pages to release based on the * current cache size and GC stop level. It first tries to release from inactive * list, then from active list if needed. * * @param[in] count Number of pages to release. If 0, calculat

 *       inactive list over active list.
 */
void dfs_pcache_release(size_t count)
{
    rt_list_t *node = RT_NULL;
    struct dfs_aspace *aspace = RT_NULL;

    dfs_pcache_lock();

    if (count == 0)
    {
        count = rt_atomic_load(&(__pcache.pages_count)) - RT_PAGECACHE_COUNT * RT_PAGECACHE_GC_STOP_LEVEL / 100;
    }

    node = __pcache.list_inactive.next;
    while (count && node != &__pcache.list_active)
    {
        aspace = rt_list_entry(node, struct dfs_aspace, cache_node);
        node = node->next;
        if (aspace)
        {
            count -= dfs_aspace_gc(aspace, count);
            dfs_aspace_release(aspace);
        }
    }

    node = __pcache.list_active.next;
    while (count && node != &__pcache.list_inactive)
    {
        aspace = rt_list_entry(node, struct dfs_aspace, cache_node);
        node = node->next;
        if (aspace)
        {
            count -= dfs_aspace_gc(aspace, count);
        }
    }

    dfs_pcache_unlock();
}

/**
 * @brief Clean up page cache entries for a specific mount point