diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-09-24 09:51:38 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-09-24 22:43:39 +0300 |
| commit | 1cb039f3dc1619eb795c54aad0a98fdb379b4237 (patch) | |
| tree | f2fbc89b26bd404d4f31b66b258e5ca08a5d9070 /drivers/nvme | |
| parent | 5115db10a8e0a525edf8a65b2ed4eac5c8253095 (diff) | |
| download | linux-1cb039f3dc1619eb795c54aad0a98fdb379b4237.tar.xz | |
bdi: replace BDI_CAP_STABLE_WRITES with a queue and a sb flag
The BDI_CAP_STABLE_WRITES is one of the few bits of information in the
backing_dev_info shared between the block drivers and the writeback code.
To help untangling the dependency replace it with a queue flag and a
superblock flag derived from it. This also helps with the case of e.g.
a file system requiring stable writes due to its own checksumming, but
not forcing it on other users of the block device like the swap code.
One downside is that we an't support the stable_pages_required bdi
attribute in sysfs anymore. It is replaced with a queue attribute which
also is writable for easier testing.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/core.c | 3 | ||||
| -rw-r--r-- | drivers/nvme/host/multipath.c | 10 |
2 files changed, 4 insertions, 9 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 741c9bfa8e14..c190c56bf702 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -3926,8 +3926,7 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid) goto out_free_ns; if (ctrl->opts && ctrl->opts->data_digest) - ns->queue->backing_dev_info->capabilities - |= BDI_CAP_STABLE_WRITES; + blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, ns->queue); blk_queue_flag_set(QUEUE_FLAG_NONROT, ns->queue); if (ctrl->ops->flags & NVME_F_PCI_P2PDMA) diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index d4ba736c6c89..74896be40c17 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -673,13 +673,9 @@ void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id) nvme_mpath_set_live(ns); } - if (bdi_cap_stable_pages_required(ns->queue->backing_dev_info)) { - struct gendisk *disk = ns->head->disk; - - if (disk) - disk->queue->backing_dev_info->capabilities |= - BDI_CAP_STABLE_WRITES; - } + if (blk_queue_stable_writes(ns->queue) && ns->head->disk) + blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, + ns->head->disk->queue); } void nvme_mpath_remove_disk(struct nvme_ns_head *head) |