From: Tang Junhui <tang.junhui@xxxxxxxxxx>
I try to execute the following command to trigger gc thread:
[root@localhost internal]# echo 1 > trigger_gc
But it does not work, I debug the code in gc_should_run(), It works only
if in invalidating or sectors_to_gc < 0. So set sectors_to_gc to -1 to
meet the condition when we trigger gc by manual command.
Signed-off-by: Tang Junhui <tang.junhui@xxxxxxxxxx>
---
drivers/md/bcache/btree.h | 6 ++++++
drivers/md/bcache/sysfs.c | 2 +-
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/md/bcache/btree.h b/drivers/md/bcache/btree.h
index 9b80417..bab07d4 100644
--- a/drivers/md/bcache/btree.h
+++ b/drivers/md/bcache/btree.h
@@ -263,6 +263,12 @@ static inline void wake_up_gc(struct cache_set *c)
wake_up(&c->gc_wait);
}
+static inline void wake_up_gc_force(struct cache_set *c)
+{
+ atomic_set(&c->sectors_to_gc, -1);
+ wake_up(&c->gc_wait);
+}
+
#define MAP_DONE 0
#define MAP_CONTINUE 1
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index b3ff57d..5fdb86c 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -615,7 +615,7 @@ STORE(__bch_cache_set)
}
if (attr == &sysfs_trigger_gc)
- wake_up_gc(c);
+ wake_up_gc_force(c);
if (attr == &sysfs_prune_cache) {
struct shrink_control sc;
--
2.8.1.windows.1
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