summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorKent Overstreet <kent.overstreet@gmail.com>2016-11-30 18:04:03 -0900
committerKent Overstreet <kent.overstreet@gmail.com>2016-11-30 18:04:03 -0900
commit802a9ab5e16373b279d3f6371f2e2e221d0f6200 (patch)
treeb17b2652e7b4c4c017538f4eaa9fa7667fc31fec
parent36bd5bfe43496f6bb9ab512af46c95b8d152ee99 (diff)
downloadlinux-bcache-bcache-vmalloc-fallback.tar.zst
bcache: add a vmalloc fallback for bucket size allocationsbcache-vmalloc-fallback
-rw-r--r--drivers/md/bcache/super.c30
1 files changed, 23 insertions, 7 deletions
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 849ad441cd76..1ff9130ea68b 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -59,6 +59,25 @@ struct workqueue_struct *bcache_wq;
#define BTREE_MAX_PAGES (256 * 1024 / PAGE_SIZE)
+static void bucket_buf_free(void *p, unsigned bucket_sectors)
+{
+ size_t bytes = bucket_sectors << 9;
+
+ if (is_vmalloc_addr(p))
+ vfree(p);
+ else
+ free_pages((unsigned long) p, get_order(bytes));
+}
+
+static void *bucket_buf_alloc(unsigned bucket_sectors)
+{
+ size_t bytes = bucket_sectors << 9;
+
+ return (void *) __get_free_pages(__GFP_NOWARN|__GFP_ZERO|GFP_KERNEL,
+ get_order(bytes)) ?:
+ vzalloc(bytes);
+}
+
/* Superblock */
static const char *read_super(struct cache_sb *sb, struct block_device *bdev,
@@ -1343,7 +1362,7 @@ static void cache_set_free(struct closure *cl)
}
bch_bset_sort_state_free(&c->sort);
- free_pages((unsigned long) c->uuids, ilog2(bucket_pages(c)));
+ bucket_buf_free(c->uuids, c->sb.bucket_size);
if (c->moving_gc_wq)
destroy_workqueue(c->moving_gc_wq);
@@ -1447,9 +1466,6 @@ void bch_cache_set_unregister(struct cache_set *c)
bch_cache_set_stop(c);
}
-#define alloc_bucket_pages(gfp, c) \
- ((void *) __get_free_pages(__GFP_ZERO|gfp, ilog2(bucket_pages(c))))
-
struct cache_set *bch_cache_set_alloc(struct cache_sb *sb)
{
int iter_size;
@@ -1519,7 +1535,7 @@ struct cache_set *bch_cache_set_alloc(struct cache_sb *sb)
bucket_pages(c))) ||
!(c->fill_iter = mempool_create_kmalloc_pool(1, iter_size)) ||
!(c->bio_split = bioset_create(4, offsetof(struct bbio, bio))) ||
- !(c->uuids = alloc_bucket_pages(GFP_KERNEL, c)) ||
+ !(c->uuids = bucket_buf_alloc(c->sb.bucket_size)) ||
!(c->moving_gc_wq = alloc_workqueue("bcache_gc",
WQ_MEM_RECLAIM, 0)) ||
bch_journal_alloc(c) ||
@@ -1786,7 +1802,7 @@ void bch_cache_release(struct kobject *kobj)
ca->set->cache[ca->sb.nr_this_dev] = NULL;
}
- free_pages((unsigned long) ca->disk_buckets, ilog2(bucket_pages(ca)));
+ bucket_buf_free(ca->disk_buckets, ca->sb.bucket_size);
kfree(ca->prio_buckets);
vfree(ca->buckets);
@@ -1830,7 +1846,7 @@ static int cache_alloc(struct cache *ca)
ca->sb.nbuckets)) ||
!(ca->prio_buckets = kzalloc(sizeof(uint64_t) * prio_buckets(ca) *
2, GFP_KERNEL)) ||
- !(ca->disk_buckets = alloc_bucket_pages(GFP_KERNEL, ca)))
+ !(ca->disk_buckets = bucket_buf_alloc(ca->sb.bucket_size)))
return -ENOMEM;
ca->prio_last_buckets = ca->prio_buckets + prio_buckets(ca);