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ftl: cache last virtual address translation

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This commit is contained in:
S.J.R. van Schaik 2017-07-24 13:09:48 +02:00
parent bc50af00b6
commit 8f061a808d
2 changed files with 8 additions and 0 deletions
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2
include/ftl.h
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@ -14,6 +14,8 @@ struct ftl_page_desc {
struct ftl_map { struct ftl_map {
struct flash_dev *dev; struct flash_dev *dev;
uint32_t last_va;
uint32_t last_pa;
uint32_t head, tail; uint32_t head, tail;
uint32_t root; uint32_t root;
uint32_t nused_pages; uint32_t nused_pages;

6
source/ftl/map.c
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@ -379,6 +379,9 @@ int trace_path(struct ftl_map *map, struct ftl_page_desc *new_page_desc,
uint8_t depth = 0; uint8_t depth = 0;
uint32_t upage = map->root; uint32_t upage = map->root;
if (map->last_va == va)
return map->last_pa;
if (new_page_desc) if (new_page_desc)
new_page_desc->va = va; new_page_desc->va = va;
@ -414,6 +417,9 @@ int trace_path(struct ftl_map *map, struct ftl_page_desc *new_page_desc,
if (page) if (page)
*page = upage; *page = upage;
map->last_va = va;
map->last_pa = upage;
return 0; return 0;
err_not_found: err_not_found: