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| author | Kiran Kumar Modukuri <kmodukuri@nvidia.com> | 2026-05-13 21:51:53 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-05-27 00:51:48 +0300 |
| commit | fb0eeeed91f3236133383445fee5cc8f20330e6e (patch) | |
| tree | 725f0948d6138a5993fea76cb13732dc69accf91 | |
| parent | 02666132403aec8fc5de315002894f713ef17dbc (diff) | |
| download | linux-fb0eeeed91f3236133383445fee5cc8f20330e6e.tar.xz | |
nvme-multipath: enable PCI P2PDMA for multipath devices
NVMe multipath does not expose BLK_FEAT_PCI_P2PDMA on the head disk
even when all underlying controllers support it.
Set BLK_FEAT_PCI_P2PDMA unconditionally in nvme_mpath_alloc_disk()
alongside the other features. nvme_update_ns_info_block() already
calls queue_limits_stack_bdev() to stack each path's limits onto the
head disk, which routes through blk_stack_limits(). The core now
clears BLK_FEAT_PCI_P2PDMA automatically if any path (e.g., FC) does
not support it, consistent with how BLK_FEAT_NOWAIT and BLK_FEAT_POLL
are handled.
Tested-by: Pranjal Shrivastava <praan@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Nitesh Shetty <nj.shetty@samsung.com>
Signed-off-by: Kiran Kumar Modukuri <kmodukuri@nvidia.com>
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Tested=by: Pranjal Shrivastava <praan@google.com>
Link: https://patch.msgid.link/20260513185153.95552-4-kch@nvidia.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | drivers/nvme/host/multipath.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index 263161cb8ac0..ff442bbf2937 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -730,7 +730,7 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head) blk_set_stacking_limits(&lim); lim.dma_alignment = 3; lim.features |= BLK_FEAT_IO_STAT | BLK_FEAT_NOWAIT | - BLK_FEAT_POLL | BLK_FEAT_ATOMIC_WRITES; + BLK_FEAT_POLL | BLK_FEAT_ATOMIC_WRITES | BLK_FEAT_PCI_P2PDMA; if (head->ids.csi == NVME_CSI_ZNS) lim.features |= BLK_FEAT_ZONED; |