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authorKent Overstreet <kmo@daterainc.com>2013-09-10 22:07:00 -0400
committerKent Overstreet <kmo@daterainc.com>2013-11-11 00:56:37 -0500
commita1f0358b2bf69be216cb6e4ea40fe7ae4d38b8a6 (patch)
tree287cf5c3daa6ae4ec2ffc55b33b6df52c617f7f7 /drivers/md/bcache/sysfs.c
parent8835c1234dd9a838993a2d5cb7572f57992ebbee (diff)
bcache: Incremental gc
Big garbage collection rewrite; now, garbage collection uses the same mechanisms as used elsewhere for inserting/updating btree node pointers, instead of rewriting interior btree nodes in place. This makes the code significantly cleaner and less fragile, and means we can now make garbage collection incremental - it doesn't have to hold a write lock on the root of the btree for the entire duration of garbage collection. This means that there's less of a latency hit for doing garbage collection, which means we can gc more frequently (and do a better job of reclaiming from the cache), and we can coalesce across more btree nodes (improving our space efficiency). Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Diffstat (limited to 'drivers/md/bcache/sysfs.c')
-rw-r--r--drivers/md/bcache/sysfs.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index 9687771ec6f3..c5f73e34d016 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -489,7 +489,6 @@ lock_root:
489 489
490 sysfs_print(btree_used_percent, btree_used(c)); 490 sysfs_print(btree_used_percent, btree_used(c));
491 sysfs_print(btree_nodes, c->gc_stats.nodes); 491 sysfs_print(btree_nodes, c->gc_stats.nodes);
492 sysfs_hprint(dirty_data, c->gc_stats.dirty);
493 sysfs_hprint(average_key_size, average_key_size(c)); 492 sysfs_hprint(average_key_size, average_key_size(c));
494 493
495 sysfs_print(cache_read_races, 494 sysfs_print(cache_read_races,
@@ -642,7 +641,6 @@ static struct attribute *bch_cache_set_files[] = {
642 &sysfs_cache_available_percent, 641 &sysfs_cache_available_percent,
643 642
644 &sysfs_average_key_size, 643 &sysfs_average_key_size,
645 &sysfs_dirty_data,
646 644
647 &sysfs_errors, 645 &sysfs_errors,
648 &sysfs_io_error_limit, 646 &sysfs_io_error_limit,