From: Jason Gunthorpe <jgg@ziepe.ca>
To: Li Zhijian <lizhijian@cn.fujitsu.com>
Cc: linux-rdma@vger.kernel.org, zyjzyj2000@gmail.com,
aharonl@nvidia.com, leon@kernel.org,
linux-kernel@vger.kernel.org, mbloch@nvidia.com,
liweihang@huawei.com, liangwenpeng@huawei.com,
yangx.jy@cn.fujitsu.com, rpearsonhpe@gmail.com,
y-goto@fujitsu.com
Subject: Re: [RFC PATCH rdma-next 01/10] RDMA: mr: Introduce is_pmem
Date: Wed, 5 Jan 2022 20:21:30 -0400 [thread overview]
Message-ID: <20220106002130.GP6467@ziepe.ca> (raw)
In-Reply-To: <20211228080717.10666-2-lizhijian@cn.fujitsu.com>
On Tue, Dec 28, 2021 at 04:07:08PM +0800, Li Zhijian wrote:
> We can use it to indicate whether the registering mr is associated with
> a pmem/nvdimm or not.
>
> Currently, we only assign it in rxe driver, for other device/drivers,
> they should implement it if needed.
>
> RDMA FLUSH will support the persistence feature for a pmem/nvdimm.
>
> Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
> drivers/infiniband/sw/rxe/rxe_mr.c | 47 ++++++++++++++++++++++++++++++
> include/rdma/ib_verbs.h | 1 +
> 2 files changed, 48 insertions(+)
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c
> index 7c4cd19a9db2..bcd5e7afa475 100644
> +++ b/drivers/infiniband/sw/rxe/rxe_mr.c
> @@ -162,6 +162,50 @@ void rxe_mr_init_dma(struct rxe_pd *pd, int access, struct rxe_mr *mr)
> mr->type = IB_MR_TYPE_DMA;
> }
>
> +// XXX: the logic is similar with mm/memory-failure.c
> +static bool page_in_dev_pagemap(struct page *page)
> +{
> + unsigned long pfn;
> + struct page *p;
> + struct dev_pagemap *pgmap = NULL;
> +
> + pfn = page_to_pfn(page);
> + if (!pfn) {
> + pr_err("no such pfn for page %p\n", page);
> + return false;
> + }
> +
> + p = pfn_to_online_page(pfn);
> + if (!p) {
> + if (pfn_valid(pfn)) {
> + pgmap = get_dev_pagemap(pfn, NULL);
> + if (pgmap)
> + put_dev_pagemap(pgmap);
> + }
> + }
> +
> + return !!pgmap;
You need to get Dan to check this out, but I'm pretty sure this should
be more like this:
if (is_zone_device_page(page) && page->pgmap->type == MEMORY_DEVICE_FS_DAX)
> +static bool iova_in_pmem(struct rxe_mr *mr, u64 iova, int length)
> +{
> + struct page *page = NULL;
> + char *vaddr = iova_to_vaddr(mr, iova, length);
> +
> + if (!vaddr) {
> + pr_err("not a valid iova %llu\n", iova);
> + return false;
> + }
> +
> + page = virt_to_page(vaddr);
And obviously this isn't uniform for the entire umem, so I don't even
know what this is supposed to mean.
> diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
> index 6e9ad656ecb7..822ebb3425dc 100644
> +++ b/include/rdma/ib_verbs.h
> @@ -1807,6 +1807,7 @@ struct ib_mr {
> unsigned int page_size;
> enum ib_mr_type type;
> bool need_inval;
> + bool is_pmem;
Or why it is being stored in the global struct?
Jason
next prev parent reply other threads:[~2022-01-06 0:22 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-28 8:07 [RFC PATCH rdma-next 00/10] RDMA/rxe: Add RDMA FLUSH operation Li Zhijian
2021-12-28 8:07 ` [RFC PATCH rdma-next 01/10] RDMA: mr: Introduce is_pmem Li Zhijian
2022-01-06 0:21 ` Jason Gunthorpe [this message]
2022-01-06 6:12 ` lizhijian
2022-01-14 8:10 ` Li, Zhijian
2022-01-27 22:30 ` Jeff Moyer
2022-01-16 18:11 ` Dan Williams
2022-01-18 8:55 ` lizhijian
2022-01-18 15:28 ` Dan Williams
2022-01-19 2:01 ` lizhijian
2021-12-28 8:07 ` [RFC PATCH rdma-next 02/10] RDMA: Allow registering MR with flush access flags Li Zhijian
2021-12-28 8:07 ` [RFC PATCH rdma-next 03/10] RDMA/rxe: Allow registering FLUSH flags for supported device only Li Zhijian
2022-01-06 0:22 ` Jason Gunthorpe
2022-01-06 6:20 ` lizhijian
2022-01-13 6:43 ` lizhijian
2021-12-28 8:07 ` [RFC PATCH rdma-next 04/10] RDMA/rxe: Enable IB_DEVICE_RDMA_FLUSH for rxe device Li Zhijian
2022-01-06 0:22 ` Jason Gunthorpe
2022-01-06 6:26 ` lizhijian
2021-12-28 8:07 ` [RFC PATCH rdma-next 05/10] RDMA/rxe: Allow registering persistent flag for pmem MR only Li Zhijian
2021-12-30 22:25 ` Tom Talpey
2021-12-31 3:34 ` lizhijian
2021-12-31 14:40 ` Tom Talpey
2022-01-04 1:32 ` lizhijian
2021-12-28 8:07 ` [RFC PATCH rdma-next 06/10] RDMA/rxe: Implement RC RDMA FLUSH service in requester side Li Zhijian
2021-12-28 8:07 ` [RFC PATCH rdma-next 07/10] RDMA/rxe: Set BTH's SE to zero for FLUSH packet Li Zhijian
2021-12-28 8:07 ` [RFC PATCH rdma-next 08/10] RDMA/rxe: Implement flush execution in responder side Li Zhijian
2021-12-30 22:18 ` Tom Talpey
2021-12-31 1:37 ` lizhijian
2021-12-31 2:32 ` Tom Talpey
2022-01-04 8:51 ` lizhijian
2022-01-04 16:02 ` Tom Talpey
2022-01-06 0:35 ` Jason Gunthorpe
2022-01-04 16:40 ` Tom Talpey
2022-01-05 1:43 ` lizhijian
2022-01-06 0:28 ` Jason Gunthorpe
2022-01-06 6:42 ` lizhijian
2022-01-06 17:33 ` Jason Gunthorpe
2022-01-10 5:45 ` lizhijian
2022-01-10 14:34 ` Jason Gunthorpe
2022-01-11 5:34 ` lizhijian
2022-01-11 20:48 ` Jason Gunthorpe
2022-01-12 9:50 ` lizhijian
2022-01-12 13:12 ` Jason Gunthorpe
2022-01-13 6:29 ` lizhijian
2021-12-28 8:07 ` [RFC PATCH rdma-next 09/10] RDMA/rxe: Implement flush completion Li Zhijian
2021-12-28 8:07 ` [RFC PATCH rdma-next 10/10] RDMA/rxe: Add RD FLUSH service support Li Zhijian
2021-12-29 8:49 ` [RFC PATCH rdma-next 00/10] RDMA/rxe: Add RDMA FLUSH operation Gromadzki, Tomasz
2021-12-29 14:35 ` Tom Talpey
2021-12-31 1:10 ` lizhijian
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220106002130.GP6467@ziepe.ca \
--to=jgg@ziepe.ca \
--cc=aharonl@nvidia.com \
--cc=leon@kernel.org \
--cc=liangwenpeng@huawei.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rdma@vger.kernel.org \
--cc=liweihang@huawei.com \
--cc=lizhijian@cn.fujitsu.com \
--cc=mbloch@nvidia.com \
--cc=rpearsonhpe@gmail.com \
--cc=y-goto@fujitsu.com \
--cc=yangx.jy@cn.fujitsu.com \
--cc=zyjzyj2000@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).