Re: [PATCH V4 0/3] md/nvme: Enable PCI P2PDMA support for RAID0 and NVMe Multipath
Jens Axboe <[email protected]>
| Newsgroups | gmane.linux.raid,gmane.linux.block |
|---|---|
| Message-ID | <177983234828.663325.17778666619930426072.b4-ty@b4> |
On Wed, 13 May 2026 11:51:50 -0700, Chaitanya Kulkarni wrote:
> This patch series extends PCI peer-to-peer DMA (P2PDMA) support to enable
> direct data transfers between PCIe devices through RAID and NVMe multipath
> block layers.
>
> Current Linux kernel P2PDMA infrastructure supports direct peer-to-peer
> transfers, but this support is not propagated through certain storage
> stacks like MD RAID and NVMe multipath. This adds two patches for
> MD RAID 0/1/10 and NVMe to propogate P2PDMA support through the
> storage stack.
>
> [...]
Applied, thanks!
[1/3] block: clear BLK_FEAT_PCI_P2PDMA in blk_stack_limits() for non-supporting devices
commit: 7882834048f110931275357db60dccff906dc96a
[2/3] md: propagate BLK_FEAT_PCI_P2PDMA from member devices to RAID device
commit: 02666132403aec8fc5de315002894f713ef17dbc
[3/3] nvme-multipath: enable PCI P2PDMA for multipath devices
commit: fb0eeeed91f3236133383445fee5cc8f20330e6e
Best regards,
--
Jens Axboe