Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/md/bcache/writeback.h b/drivers/md/bcache/writeback.h
index d2b9fdb..4e4c681 100644
--- a/drivers/md/bcache/writeback.h
+++ b/drivers/md/bcache/writeback.h
@@ -5,12 +5,17 @@
#define CUTOFF_WRITEBACK 40
#define CUTOFF_WRITEBACK_SYNC 70
+#define CUTOFF_WRITEBACK_MAX 70
+#define CUTOFF_WRITEBACK_SYNC_MAX 90
+
#define MAX_WRITEBACKS_IN_PASS 5
#define MAX_WRITESIZE_IN_PASS 5000 /* *512b */
#define WRITEBACK_RATE_UPDATE_SECS_MAX 60
#define WRITEBACK_RATE_UPDATE_SECS_DEFAULT 5
+#define BCH_AUTO_GC_DIRTY_THRESHOLD 50
+
/*
* 14 (16384ths) is chosen here as something that each backing device
* should be a reasonable fraction of the share, and not to blow up
@@ -53,6 +58,9 @@
}
}
+extern unsigned int bch_cutoff_writeback;
+extern unsigned int bch_cutoff_writeback_sync;
+
static inline bool should_writeback(struct cached_dev *dc, struct bio *bio,
unsigned int cache_mode, bool would_skip)
{
@@ -60,7 +68,10 @@
if (cache_mode != CACHE_MODE_WRITEBACK ||
test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags) ||
- in_use > CUTOFF_WRITEBACK_SYNC)
+ in_use > bch_cutoff_writeback_sync)
+ return false;
+
+ if (bio_op(bio) == REQ_OP_DISCARD)
return false;
if (dc->partial_stripes_expensive &&
@@ -73,7 +84,7 @@
return (op_is_sync(bio->bi_opf) ||
bio->bi_opf & (REQ_META|REQ_PRIO) ||
- in_use <= CUTOFF_WRITEBACK);
+ in_use <= bch_cutoff_writeback);
}
static inline void bch_writeback_queue(struct cached_dev *dc)