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On Tue, Feb 01, 2022 at 01:33:47PM -0500, Mikulas Patocka wrote:
> This patch adds a new driver "nvme-debug". It uses memory as a backing
> store and it is used to test the copy offload functionality.
>
We have looked at something similar to create a null nvme driver to test
interfaces poking
On Thu, Jan 27, 2022 at 12:51 PM Chaitanya Kulkarni
wrote:
>
> Hi,
>
> * Background :-
> ---
>
> Copy offload is a feature that allows file-systems or storage devices
> to be instructed to copy files/logical blocks without
On Tue, 1 Feb 2022, Bart Van Assche wrote:
> On 2/1/22 10:33, Mikulas Patocka wrote:
> > +static inline blk_status_t nvme_setup_read_token(struct nvme_ns *ns, struct
> > request *req)
> > +{
> > + struct bio *bio = req->bio;
> > + struct nvme_copy_token *token =
> >
On 2/1/22 10:32, Mikulas Patocka wrote:
/**
+ * blk_queue_max_copy_sectors - set maximum copy offload sectors for the queue
+ * @q: the request queue for the device
+ * @size: the maximum copy offload sectors
+ */
+void blk_queue_max_copy_sectors(struct request_queue *q, unsigned int size)
On 2/1/22 10:33, Mikulas Patocka wrote:
+static inline blk_status_t nvme_setup_read_token(struct nvme_ns *ns, struct
request *req)
+{
+ struct bio *bio = req->bio;
+ struct nvme_copy_token *token = page_to_virt(bio->bi_io_vec[0].bv_page) +
bio->bi_io_vec[0].bv_offset;
Hmm ...
This patch adds a new driver "nvme-debug". It uses memory as a backing
store and it is used to test the copy offload functionality.
Signed-off-by: Mikulas Patocka
---
drivers/nvme/host/Kconfig | 13
drivers/nvme/host/Makefile |1
drivers/nvme/host/nvme-debug.c | 838
This patch adds copy offload support to the nvme host driver.
The function nvme_setup_read_token stores namespace and location in the
token and the function nvme_setup_write_token retrieves information from
the token and submits the copy command to the device.
Signed-off-by: Mikulas Patocka
Add generic copy offload support to the block layer.
We add two new bio types: REQ_OP_COPY_READ_TOKEN and
REQ_OP_COPY_WRITE_TOKEN. Their bio vector has one entry - a page
containing the token.
When we need to copy data, we send REQ_OP_COPY_READ_TOKEN to the source
device and then we send
Hi
Here I'm submitting the first version of NVMe copy offload patches as a
request for comment. They use the token-based approach as we discussed on
the phone call.
The first patch adds generic copy offload support to the block layer - it
adds two new bio types (REQ_OP_COPY_READ_TOKEN and
On Tue 01 Feb 2022 09:40, Martin Wilck wrote:
> On Mon, 2022-01-31 at 14:33 +0100, Peter Rajnoha wrote:
> > (just discussed this with Zdenek too)
> >
> > The patch makes sense to me!
> >
> > We added all the DM_UDEV_PRIMARY_SOURCE_FLAG and related for exactly
> > such cases where we need to take
Dne 01. 02. 22 v 9:40 Martin Wilck napsal(a):
On Mon, 2022-01-31 at 14:33 +0100, Peter Rajnoha wrote:
(just discussed this with Zdenek too)
The patch makes sense to me!
We added all the DM_UDEV_PRIMARY_SOURCE_FLAG and related for exactly
such cases where we need to take the existing values
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