It isn't safe(such as bch_data_verify()) to let bcache deal with more than 1M bio from multipage bvec, so set this flag and size of incoming bio won't be bigger than BIO_SP_MAX_SECTORS. Signed-off-by: Ming Lei <tom.leiming@xxxxxxxxx> --- drivers/md/bcache/super.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 52876fcf2b36..fca023a1a026 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -821,6 +821,12 @@ static int bcache_device_init(struct bcache_device *d, unsigned block_size, blk_queue_write_cache(q, true, true); + /* + * Once bcache is audited that it is ready to deal with big + * incoming bio with multipage bvecs, we can remove the flag. + */ + set_bit(QUEUE_FLAG_SPLIT_MP, &d->disk->queue->queue_flags); + return 0; } -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
