From e0690a04530619b339c9ec42c8fff05aecb7c66f Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Sat, 7 Nov 2020 10:59:54 -0500 Subject: bcachefs: Use get_random_bytes_arch() for hash seed These random bytes aren't used for keying, just seeds for hash tables, and the RNG used by get_random_bytes() unfortunately isn't percpu so on certain workloads we see a fair amount of lock contention. Signed-off-by: Kent Overstreet --- fs/bcachefs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/bcachefs/inode.c b/fs/bcachefs/inode.c index bf1c7319669c..e1823c0c3881 100644 --- a/fs/bcachefs/inode.c +++ b/fs/bcachefs/inode.c @@ -418,7 +418,7 @@ void bch2_inode_init_early(struct bch_fs *c, /* ick */ inode_u->bi_flags |= str_hash << INODE_STR_HASH_OFFSET; - get_random_bytes(&inode_u->bi_hash_seed, + get_random_bytes_arch(&inode_u->bi_hash_seed, sizeof(inode_u->bi_hash_seed)); } -- cgit v1.2.3