forked from Minki/linux
nvme-multipath: set bdi capabilities once
The queues' backing device info capabilities don't change with each namespace revalidation. Set it only when each path's request_queue is initially added to a multipath queue. Signed-off-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -1909,13 +1909,6 @@ static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
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if (ns->head->disk) {
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nvme_update_disk_info(ns->head->disk, ns, id);
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blk_queue_stack_limits(ns->head->disk->queue, ns->queue);
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if (bdi_cap_stable_pages_required(ns->queue->backing_dev_info)) {
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struct backing_dev_info *info =
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ns->head->disk->queue->backing_dev_info;
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info->capabilities |= BDI_CAP_STABLE_WRITES;
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}
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revalidate_disk(ns->head->disk);
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}
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#endif
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@ -3,6 +3,7 @@
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* Copyright (c) 2017-2018 Christoph Hellwig.
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*/
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#include <linux/backing-dev.h>
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#include <linux/moduleparam.h>
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#include <trace/events/block.h>
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#include "nvme.h"
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@ -666,6 +667,13 @@ void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id)
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nvme_mpath_set_live(ns);
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mutex_unlock(&ns->head->lock);
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}
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if (bdi_cap_stable_pages_required(ns->queue->backing_dev_info)) {
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struct backing_dev_info *info =
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ns->head->disk->queue->backing_dev_info;
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info->capabilities |= BDI_CAP_STABLE_WRITES;
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}
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}
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void nvme_mpath_remove_disk(struct nvme_ns_head *head)
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