From: Jens Axboe axboe@kernel.dk
commit de1b0ee490eafdf65fac9eef9925391a8369f2dc upstream.
If a driver leaves the limit settings as the defaults, then we don't initialize bdi->io_pages. This means that file systems may need to work around bdi->io_pages == 0, which is somewhat messy.
Initialize the default value just like we do for ->ra_pages.
Cc: stable@vger.kernel.org Fixes: 9491ae4aade6 ("mm: don't cap request size based on read-ahead setting") Reported-by: OGAWA Hirofumi hirofumi@mail.parknet.co.jp Reviewed-by: Christoph Hellwig hch@lst.de Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- block/blk-core.c | 1 + 1 file changed, 1 insertion(+)
--- a/block/blk-core.c +++ b/block/blk-core.c @@ -502,6 +502,7 @@ struct request_queue *blk_alloc_queue_no goto fail_stats;
q->backing_dev_info->ra_pages = VM_READAHEAD_PAGES; + q->backing_dev_info->io_pages = VM_READAHEAD_PAGES; q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK; q->backing_dev_info->name = "block"; q->node = node_id;