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author | Glenn Elliott <gelliott@cs.unc.edu> | 2012-03-04 19:47:13 -0500 |
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committer | Glenn Elliott <gelliott@cs.unc.edu> | 2012-03-04 19:47:13 -0500 |
commit | c71c03bda1e86c9d5198c5d83f712e695c4f2a1e (patch) | |
tree | ecb166cb3e2b7e2adb3b5e292245fefd23381ac8 /include/linux/lru_cache.h | |
parent | ea53c912f8a86a8567697115b6a0d8152beee5c8 (diff) | |
parent | 6a00f206debf8a5c8899055726ad127dbeeed098 (diff) |
Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp
Conflicts:
litmus/sched_cedf.c
Diffstat (limited to 'include/linux/lru_cache.h')
-rw-r--r-- | include/linux/lru_cache.h | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/include/linux/lru_cache.h b/include/linux/lru_cache.h index 78fbf24f357a..7a71ffad037c 100644 --- a/include/linux/lru_cache.h +++ b/include/linux/lru_cache.h | |||
@@ -139,16 +139,16 @@ write intent log information, three of which are mentioned here. | |||
139 | * .list is on one of three lists: | 139 | * .list is on one of three lists: |
140 | * in_use: currently in use (refcnt > 0, lc_number != LC_FREE) | 140 | * in_use: currently in use (refcnt > 0, lc_number != LC_FREE) |
141 | * lru: unused but ready to be reused or recycled | 141 | * lru: unused but ready to be reused or recycled |
142 | * (ts_refcnt == 0, lc_number != LC_FREE), | 142 | * (lc_refcnt == 0, lc_number != LC_FREE), |
143 | * free: unused but ready to be recycled | 143 | * free: unused but ready to be recycled |
144 | * (ts_refcnt == 0, lc_number == LC_FREE), | 144 | * (lc_refcnt == 0, lc_number == LC_FREE), |
145 | * | 145 | * |
146 | * an element is said to be "in the active set", | 146 | * an element is said to be "in the active set", |
147 | * if either on "in_use" or "lru", i.e. lc_number != LC_FREE. | 147 | * if either on "in_use" or "lru", i.e. lc_number != LC_FREE. |
148 | * | 148 | * |
149 | * DRBD currently (May 2009) only uses 61 elements on the resync lru_cache | 149 | * DRBD currently (May 2009) only uses 61 elements on the resync lru_cache |
150 | * (total memory usage 2 pages), and up to 3833 elements on the act_log | 150 | * (total memory usage 2 pages), and up to 3833 elements on the act_log |
151 | * lru_cache, totalling ~215 kB for 64bit architechture, ~53 pages. | 151 | * lru_cache, totalling ~215 kB for 64bit architecture, ~53 pages. |
152 | * | 152 | * |
153 | * We usually do not actually free these objects again, but only "recycle" | 153 | * We usually do not actually free these objects again, but only "recycle" |
154 | * them, as the change "index: -old_label, +LC_FREE" would need a transaction | 154 | * them, as the change "index: -old_label, +LC_FREE" would need a transaction |
@@ -160,8 +160,8 @@ struct lc_element { | |||
160 | struct hlist_node colision; | 160 | struct hlist_node colision; |
161 | struct list_head list; /* LRU list or free list */ | 161 | struct list_head list; /* LRU list or free list */ |
162 | unsigned refcnt; | 162 | unsigned refcnt; |
163 | /* back "pointer" into ts_cache->element[index], | 163 | /* back "pointer" into lc_cache->element[index], |
164 | * for paranoia, and for "ts_element_to_index" */ | 164 | * for paranoia, and for "lc_element_to_index" */ |
165 | unsigned lc_index; | 165 | unsigned lc_index; |
166 | /* if we want to track a larger set of objects, | 166 | /* if we want to track a larger set of objects, |
167 | * it needs to become arch independend u64 */ | 167 | * it needs to become arch independend u64 */ |
@@ -190,8 +190,8 @@ struct lru_cache { | |||
190 | /* Arbitrary limit on maximum tracked objects. Practical limit is much | 190 | /* Arbitrary limit on maximum tracked objects. Practical limit is much |
191 | * lower due to allocation failures, probably. For typical use cases, | 191 | * lower due to allocation failures, probably. For typical use cases, |
192 | * nr_elements should be a few thousand at most. | 192 | * nr_elements should be a few thousand at most. |
193 | * This also limits the maximum value of ts_element.ts_index, allowing the | 193 | * This also limits the maximum value of lc_element.lc_index, allowing the |
194 | * 8 high bits of .ts_index to be overloaded with flags in the future. */ | 194 | * 8 high bits of .lc_index to be overloaded with flags in the future. */ |
195 | #define LC_MAX_ACTIVE (1<<24) | 195 | #define LC_MAX_ACTIVE (1<<24) |
196 | 196 | ||
197 | /* statistics */ | 197 | /* statistics */ |